Wifi Intermittent on Samsung Series 9 laptop

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gtj
Level 1
Level 1
Posts: 9
Joined: Wed Oct 18, 2017 6:30 pm

Wifi Intermittent on Samsung Series 9 laptop

Postby gtj » Fri Oct 20, 2017 2:32 pm

Hello.

There are a few days since I installed Linux Mint 18.2 on my laptop which is a Samsung Series 9 900x3c.
It's an i5 3517u with 4gb RAM and an Intel Centrino 6235 PCI-e Wireless card.

These specific laptops were notorious for having wifi problems in their early days but the last few years and after a few updates by Microsoft and Intel, I hadn't had any problems with connection drops running Windows.

After I installed Mint there are connection drops almost every 20 minutes when I'm connected to the University network (guest or eduroam). I haven't noticed any similar behavior when I'm at home though but I might be wrong as the laptop does not get much use when I'm at home.

What I tried:
- I set power saving to off for the wireless adapter and even reloaded the iwlwifi kernel module with option 11n_disable set to 1, in order to disable 802.11N, as I've read there are problems with a broken ''N'' driver.

-I also tried an external USB network adapter with no success.

A

Code: Select all

service network-manager restart
will fix the problem temporarily until of course it drops again.. I thought about uninstalling network manager and install WICD instead but there are conflicting information with regards to uninstalling network manager on mint, saying that doing so it also uninstalls the Cinamon desktop, rendering the system inoperable.

I even thought about upgrading my network card to something newer like Intel's 7260 Plus.

Could anyone please be so kind and advise if there's anything else I should try? I love my new OS/computer which fulfills my needs but, obviously, that's a dealbreaker for me and I will sadly have to revert to Windows if I don't find a viable solution. :(

gtj
Level 1
Level 1
Posts: 9
Joined: Wed Oct 18, 2017 6:30 pm

Re: Wifi Intermittent on Samsung Series 9 laptop

Postby gtj » Fri Oct 20, 2017 4:15 pm

Code: Select all

########## wireless info START ##########

Report from: 20 Oct 2017 20:14 BST +0100

Booted last: 20 Oct 2017 00:00 BST +0100

Script from: 25 Mar 2017 07:04 UTC +0000

##### release ###########################

Distributor ID:   LinuxMint
Description:   Linux Mint 18.2 Sonya
Release:   18.2
Codename:   sonya

##### kernel ############################

Linux 4.10.0-37-generic #41~16.04.1-Ubuntu SMP Fri Oct 6 22:42:59 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

Parameters: ro, quiet, splash, vt.handoff=7

##### desktop ###########################

Cinnamon

##### lspci #############################

01:00.0 Network controller [0280]: Intel Corporation Centrino Advanced-N 6235 [8086:088e] (rev 24)
   Subsystem: Intel Corporation Centrino Advanced-N 6235 AGN [8086:4060]
   Kernel driver in use: iwlwifi

02:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 06)
   Subsystem: Samsung Electronics Co Ltd RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [144d:c0d3]
   Kernel driver in use: r8169

##### lsusb #############################

Bus 001 Device 005: ID 2232:1024 Silicon Motion
Bus 001 Device 004: ID 8087:07da Intel Corp.
Bus 001 Device 003: ID 062a:4101 Creative Labs Wireless Keyboard/Mouse
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

##### PCMCIA card info ##################

##### rfkill ############################

0: samsung-wlan: Wireless LAN
   Soft blocked: no
   Hard blocked: no
1: samsung-bluetooth: Bluetooth
   Soft blocked: no
   Hard blocked: no
3: hci0: Bluetooth
   Soft blocked: no
   Hard blocked: no
5: phy0: Wireless LAN
   Soft blocked: no
   Hard blocked: no

##### lsmod #############################

iwldvm                233472  0
mac80211              782336  1 iwldvm
iwlwifi               225280  1 iwldvm
cfg80211              602112  3 iwlwifi,mac80211,iwldvm
wmi                    16384  0

##### interfaces ########################

auto lo
iface lo inet loopback

##### ifconfig ##########################

enp2s0    Link encap:Ethernet  HWaddr <MAC 'enp2s0' [IF1]> 
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

lo        Link encap:Local Loopback 
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:5798 errors:0 dropped:0 overruns:0 frame:0
          TX packets:5798 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:567947 (567.9 KB)  TX bytes:567947 (567.9 KB)

wlp1s0    Link encap:Ethernet  HWaddr <MAC 'wlp1s0' [IF2]> 
          inet addr:10.16.191.7  Bcast:10.16.191.255  Mask:255.255.252.0
          inet6 addr: fe80::9121:168c:d44b:41b1/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:216023 errors:0 dropped:0 overruns:0 frame:0
          TX packets:124022 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:282733193 (282.7 MB)  TX bytes:13826992 (13.8 MB)

##### iwconfig ##########################

enp2s0    no wireless extensions.

lo        no wireless extensions.

wlp1s0    IEEE 802.11  ESSID:"UoN-guest" 
          Mode:Managed  Frequency:5.22 GHz  Access Point: <MAC 'UoN-guest' [AC1]>   
          Bit Rate=12 Mb/s   Tx-Power=15 dBm   
          Retry short limit:7   RTS thr:off   Fragment thr:off
          Power Management:off
          Link Quality=58/70  Signal level=-52 dBm 
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:7  Invalid misc:18   Missed beacon:0

##### route #############################

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         10.16.188.1     0.0.0.0         UG    600    0        0 wlp1s0
10.16.188.0     0.0.0.0         255.255.252.0   U     600    0        0 wlp1s0
169.254.0.0     0.0.0.0         255.255.0.0     U     1000   0        0 wlp1s0
192.0.2.1       10.16.188.1     255.255.255.255 UGH   600    0        0 wlp1s0

##### resolv.conf #######################

nameserver 127.0.1.1

##### network managers ##################

Installed:

   NetworkManager
   Wicd

Running:

root     11750     1  0 19:45 ?        00:00:00 /usr/sbin/NetworkManager --no-daemon

##### NetworkManager info ###############

GENERAL.DEVICE:                         wlp1s0
GENERAL.TYPE:                           wifi
GENERAL.NM-TYPE:                        NMDeviceWifi
GENERAL.VENDOR:                         Intel Corporation
GENERAL.PRODUCT:                        Centrino Advanced-N 6235 (AGN)
GENERAL.DRIVER:                         iwlwifi
GENERAL.DRIVER-VERSION:                 4.10.0-37-generic
GENERAL.FIRMWARE-VERSION:               18.168.6.1
GENERAL.HWADDR:                         <MAC 'wlp1s0' [IF2]>
GENERAL.MTU:                            0
GENERAL.STATE:                          100 (connected)
GENERAL.REASON:                         0 (No reason given)
GENERAL.UDI:                            /sys/devices/pci0000:00/0000:00:1c.0/0000:01:00.0/net/wlp1s0
GENERAL.IP-IFACE:                       wlp1s0
GENERAL.IS-SOFTWARE:                    no
GENERAL.NM-MANAGED:                     yes
GENERAL.AUTOCONNECT:                    yes
GENERAL.FIRMWARE-MISSING:               no
GENERAL.NM-PLUGIN-MISSING:              no
GENERAL.PHYS-PORT-ID:                   --
GENERAL.CONNECTION:                     UoN-guest
GENERAL.CON-UUID:                       921198f5-dca5-4111-a4df-9334a640c234
GENERAL.CON-PATH:                       /org/freedesktop/NetworkManager/ActiveConnection/0
GENERAL.METERED:                        no (guessed)
CAPABILITIES.CARRIER-DETECT:            no
CAPABILITIES.SPEED:                     54 Mb/s
CAPABILITIES.IS-SOFTWARE:               no
WIFI-PROPERTIES.WEP:                    yes
WIFI-PROPERTIES.WPA:                    yes
WIFI-PROPERTIES.WPA2:                   yes
WIFI-PROPERTIES.TKIP:                   yes
WIFI-PROPERTIES.CCMP:                   yes
WIFI-PROPERTIES.AP:                     yes
WIFI-PROPERTIES.ADHOC:                  yes
WIFI-PROPERTIES.2GHZ:                   yes
WIFI-PROPERTIES.5GHZ:                   yes
CONNECTIONS.AVAILABLE-CONNECTION-PATHS: /org/freedesktop/NetworkManager/Settings/{6}
CONNECTIONS.AVAILABLE-CONNECTIONS[1]:   921198f5-dca5-4111-a4df-9334a640c234 | UoN-guest
IP4.ADDRESS[1]:                         10.16.191.7/22
IP4.GATEWAY:                            10.16.188.1
IP4.ROUTE[1]:                           dst = 192.0.2.1/32, nh = 10.16.188.1, mt = 600
IP4.ROUTE[2]:                           dst = 169.254.0.0/16, nh = 0.0.0.0, mt = 1000
IP4.DNS[1]:                             8.8.4.4
IP4.DNS[2]:                             8.8.8.8
DHCP4.OPTION[1]:                        requested_routers = 1
DHCP4.OPTION[2]:                        requested_domain_search = 1
DHCP4.OPTION[3]:                        requested_time_offset = 1
DHCP4.OPTION[4]:                        requested_domain_name = 1
DHCP4.OPTION[5]:                        requested_rfc3442_classless_static_routes = 1
DHCP4.OPTION[6]:                        requested_broadcast_address = 1
DHCP4.OPTION[7]:                        requested_netbios_scope = 1
DHCP4.OPTION[8]:                        requested_wpad = 1
DHCP4.OPTION[9]:                        next_server = 0.0.0.0
DHCP4.OPTION[10]:                       expiry = 1508528831
DHCP4.OPTION[11]:                       requested_interface_mtu = 1
DHCP4.OPTION[12]:                       requested_subnet_mask = 1
DHCP4.OPTION[13]:                       dhcp_lease_time = 3600
DHCP4.OPTION[14]:                       dhcp_message_type = 5
DHCP4.OPTION[15]:                       ip_address = 10.16.191.7
DHCP4.OPTION[16]:                       requested_static_routes = 1
DHCP4.OPTION[17]:                       requested_domain_name_servers = 1
DHCP4.OPTION[18]:                       routers = 10.16.188.1
DHCP4.OPTION[19]:                       broadcast_address = 10.16.191.255
DHCP4.OPTION[20]:                       requested_ntp_servers = 1
DHCP4.OPTION[21]:                       requested_netbios_name_servers = 1
DHCP4.OPTION[22]:                       domain_name_servers = 8.8.4.4 8.8.8.8
DHCP4.OPTION[23]:                       requested_ms_classless_static_routes = 1
DHCP4.OPTION[24]:                       subnet_mask = 255.255.252.0
DHCP4.OPTION[25]:                       network_number = 10.16.188.0
DHCP4.OPTION[26]:                       requested_host_name = 1
DHCP4.OPTION[27]:                       dhcp_server_identifier = 192.0.2.1
IP6.ADDRESS[1]:                         fe80::9121:168c:d44b:41b1/64
IP6.GATEWAY:                           

GENERAL.DEVICE:                         enp2s0
GENERAL.TYPE:                           ethernet
GENERAL.NM-TYPE:                        NMDeviceEthernet
GENERAL.VENDOR:                         Realtek Semiconductor Co., Ltd.
GENERAL.PRODUCT:                        RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
GENERAL.DRIVER:                         r8169
GENERAL.DRIVER-VERSION:                 2.3LK-NAPI
GENERAL.FIRMWARE-VERSION:               rtl8168e-3_0.0.4 03/27/12
GENERAL.HWADDR:                         <MAC 'enp2s0' [IF1]>
GENERAL.MTU:                            1500
GENERAL.STATE:                          20 (unavailable)
GENERAL.REASON:                         2 (Device is now managed)
GENERAL.UDI:                            /sys/devices/pci0000:00/0000:00:1c.3/0000:02:00.0/net/enp2s0
GENERAL.IP-IFACE:                       
GENERAL.IS-SOFTWARE:                    no
GENERAL.NM-MANAGED:                     yes
GENERAL.AUTOCONNECT:                    yes
GENERAL.FIRMWARE-MISSING:               no
GENERAL.NM-PLUGIN-MISSING:              no
GENERAL.PHYS-PORT-ID:                   --
GENERAL.CONNECTION:                     --
GENERAL.CON-UUID:                       --
GENERAL.CON-PATH:                       --
GENERAL.METERED:                        unknown
CAPABILITIES.CARRIER-DETECT:            yes
CAPABILITIES.SPEED:                     unknown
CAPABILITIES.IS-SOFTWARE:               no
WIRED-PROPERTIES.CARRIER:               off
CONNECTIONS.AVAILABLE-CONNECTION-PATHS:

SSID       BSSID              MODE   CHAN  FREQ      RATE       SIGNAL  BARS  SECURITY     ACTIVE  *
UoN-guest  <MAC 'UoN-guest' [AN1]>  Infra  11    2462 MHz  54 Mbit/s  77      ▂▄▆_  --           no       
eduroam    <MAC 'eduroam' [AC3]>  Infra  44    5220 MHz  54 Mbit/s  74      ▂▄▆_  WPA2 802.1X  no       
UoN-guest  <MAC 'UoN-guest' [AC1]>  Infra  44    5220 MHz  54 Mbit/s  68      ▂▄▆_  --           yes     *
UoN-guest  <MAC 'UoN-guest' [AC5]>  Infra  132   5660 MHz  54 Mbit/s  42      ▂▄__  --           no       
eduroam    <MAC 'eduroam' [AC6]>  Infra  132   5660 MHz  54 Mbit/s  40      ▂▄__  WPA2 802.1X  no       
eduroam    <MAC 'eduroam' [AN6]>  Infra  1     2412 MHz  54 Mbit/s  34      ▂▄__  WPA2 802.1X  no       
eduroam    <MAC 'eduroam' [AC4]>  Infra  100   5500 MHz  54 Mbit/s  27      ▂___  WPA2 802.1X  no       
eduroam    <MAC 'eduroam' [AN8]>  Infra  1     2412 MHz  54 Mbit/s  25      ▂___  WPA2 802.1X  no       
eduroam    <MAC 'eduroam' [AC9]>  Infra  11    2462 MHz  54 Mbit/s  22      ▂___  WPA2 802.1X  no       

##### NetworkManager.state ##############

[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true

##### NetworkManager.conf ###############

[main]
plugins=ifupdown,keyfile,ofono
dns=dnsmasq

[ifupdown]
managed=false

##### NetworkManager profiles ###########

[[/etc/NetworkManager/system-connections/Auto TALISMAN -2G]] (600 root)
[connection] id=Auto TALISMAN -2G | type=wifi | permissions=
[wifi] mac-address=<MAC address> | mac-address-blacklist= | ssid=TALISMAN -2G
[ipv4] method=auto
[ipv6] method=auto

[[/etc/NetworkManager/system-connections/Auto TALISMAN -2G-6dc2fdd0-17b3-4111-8db6-8a1efd8152e3]] (600 root)
[connection] id=Auto TALISMAN -2G | type=wifi | permissions=
[wifi] mac-address=<MAC address> | mac-address-blacklist= | ssid=TALISMAN -2G
[ipv4] method=auto
[ipv6] method=auto

[[/etc/NetworkManager/system-connections/Auto TALISMAN -2G-0ba5b2c4-f1fe-4734-8277-6147295f878a]] (600 root)
[connection] id=Auto TALISMAN -2G | type=wifi | permissions=
[wifi] mac-address=<MAC 'wlp1s0' [IF2]> | mac-address-blacklist= | ssid=TALISMAN -2G
[ipv4] method=manual
[ipv6] method=auto

[[/etc/NetworkManager/system-connections/Auto UoN-guest]] (600 root)
[connection] id=Auto UoN-guest | type=wifi | permissions=
[wifi] mac-address=<MAC address> | mac-address-blacklist= | ssid=UoN-guest
[ipv4] method=auto
[ipv6] method=auto

[[/etc/NetworkManager/system-connections/UoN-guest]] (600 root)
[connection] id=UoN-guest | type=wifi | permissions=
[wifi] mac-address=<MAC 'wlp1s0' [IF2]> | mac-address-blacklist= | ssid=UoN-guest
[ipv4] method=auto
[ipv6] method=ignore

##### iw reg get ########################

Region: Europe/London (based on set time zone)

country GB: DFS-ETSI
   (2402 - 2482 @ 40), (N/A, 20), (N/A)
   (5170 - 5250 @ 80), (N/A, 20), (N/A)
   (5250 - 5330 @ 80), (N/A, 20), (0 ms), DFS
   (5490 - 5710 @ 160), (N/A, 27), (0 ms), DFS
   (57000 - 66000 @ 2160), (N/A, 40), (N/A)

##### iwlist channels ###################

enp2s0    no frequency information.

lo        no frequency information.

wlp1s0    32 channels in total; available frequencies :
          Channel 01 : 2.412 GHz
          Channel 02 : 2.417 GHz
          Channel 03 : 2.422 GHz
          Channel 04 : 2.427 GHz
          Channel 05 : 2.432 GHz
          Channel 06 : 2.437 GHz
          Channel 07 : 2.442 GHz
          Channel 08 : 2.447 GHz
          Channel 09 : 2.452 GHz
          Channel 10 : 2.457 GHz
          Channel 11 : 2.462 GHz
          Channel 12 : 2.467 GHz
          Channel 13 : 2.472 GHz
          Channel 36 : 5.18 GHz
          Channel 40 : 5.2 GHz
          Channel 44 : 5.22 GHz
          Channel 48 : 5.24 GHz
          Channel 52 : 5.26 GHz
          Channel 56 : 5.28 GHz
          Channel 60 : 5.3 GHz
          Channel 64 : 5.32 GHz
          Channel 100 : 5.5 GHz
          Channel 104 : 5.52 GHz
          Channel 108 : 5.54 GHz
          Channel 112 : 5.56 GHz
          Channel 116 : 5.58 GHz
          Channel 120 : 5.6 GHz
          Channel 124 : 5.62 GHz
          Channel 128 : 5.64 GHz
          Channel 132 : 5.66 GHz
          Channel 136 : 5.68 GHz
          Channel 140 : 5.7 GHz
          Current Frequency:5.22 GHz (Channel 44)

##### iwlist scan #######################

enp2s0    Interface doesn't support scanning.

lo        Interface doesn't support scanning.

Channel occupancy:

      2   APs on   Frequency:2.412 GHz (Channel 1)
      1   APs on   Frequency:2.437 GHz (Channel 6)
      1   APs on   Frequency:2.462 GHz (Channel 11)
      2   APs on   Frequency:5.22 GHz (Channel 44)
      1   APs on   Frequency:5.5 GHz (Channel 100)
      2   APs on   Frequency:5.66 GHz (Channel 132)

wlp1s0    Scan completed :
          Cell 01 - Address: <MAC 'UoN-guest' [AC1]>
                    Channel:44
                    Frequency:5.22 GHz (Channel 44)
                    Quality=53/70  Signal level=-57 dBm 
                    Encryption key:off
                    ESSID:"UoN-guest"
                    Bit Rates:12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s; 48 Mb/s
                              54 Mb/s
                    Mode:Master
                    Extra:tsf=0000063ff378a9f1
                    Extra: Last beacon: 164ms ago
          Cell 02 - Address: <MAC 'UoN-guest' [AC2]>
                    Channel:1
                    Frequency:2.412 GHz (Channel 1)
                    Quality=62/70  Signal level=-48 dBm 
                    Encryption key:off
                    ESSID:"UoN-guest"
                    Bit Rates:12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s; 48 Mb/s
                              54 Mb/s
                    Mode:Master
                    Extra:tsf=0000063ff3151824
                    Extra: Last beacon: 11004ms ago
          Cell 03 - Address: <MAC 'eduroam' [AC3]>
                    Channel:44
                    Frequency:5.22 GHz (Channel 44)
                    Quality=53/70  Signal level=-57 dBm 
                    Encryption key:on
                    ESSID:"eduroam"
                    Bit Rates:12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s; 48 Mb/s
                              54 Mb/s
                    Mode:Master
                    Extra:tsf=0000063ff377ecee
                    Extra: Last beacon: 3456ms ago
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : CCMP
                        Pairwise Ciphers (1) : CCMP
                        Authentication Suites (1) : 802.1x
          Cell 04 - Address: <MAC 'eduroam' [AC4]>
                    Channel:100
                    Frequency:5.5 GHz (Channel 100)
                    Quality=26/70  Signal level=-84 dBm 
                    Encryption key:on
                    ESSID:"eduroam"
                    Bit Rates:12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s; 48 Mb/s
                              54 Mb/s
                    Mode:Master
                    Extra:tsf=0000063ff415b024
                    Extra: Last beacon: 8696ms ago
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : CCMP
                        Pairwise Ciphers (1) : CCMP
                        Authentication Suites (1) : 802.1x
          Cell 05 - Address: <MAC 'UoN-guest' [AC5]>
                    Channel:132
                    Frequency:5.66 GHz (Channel 132)
                    Quality=38/70  Signal level=-72 dBm 
                    Encryption key:off
                    ESSID:"UoN-guest"
                    Bit Rates:12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s; 48 Mb/s
                              54 Mb/s
                    Mode:Master
                    Extra:tsf=0000063ff4a1f222
                    Extra: Last beacon: 568ms ago
          Cell 06 - Address: <MAC 'eduroam' [AC6]>
                    Channel:132
                    Frequency:5.66 GHz (Channel 132)
                    Quality=37/70  Signal level=-73 dBm 
                    Encryption key:on
                    ESSID:"eduroam"
                    Bit Rates:12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s; 48 Mb/s
                              54 Mb/s
                    Mode:Master
                    Extra:tsf=0000063ff4a2cc5f
                    Extra: Last beacon: 568ms ago
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : CCMP
                        Pairwise Ciphers (1) : CCMP
                        Authentication Suites (1) : 802.1x
          Cell 07 - Address: <MAC 'UoN-guest' [AC7]>
                    Channel:1
                    Frequency:2.412 GHz (Channel 1)
                    Quality=23/70  Signal level=-87 dBm 
                    Encryption key:off
                    ESSID:"UoN-guest"
                    Bit Rates:12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s; 48 Mb/s
                              54 Mb/s
                    Mode:Master
                    Extra:tsf=000000d27b77a024
                    Extra: Last beacon: 4648ms ago
          Cell 08 - Address: <MAC 'eduroam' [AC8]>
                    Channel:6
                    Frequency:2.437 GHz (Channel 6)
                    Quality=32/70  Signal level=-78 dBm 
                    Encryption key:on
                    ESSID:"eduroam"
                    Bit Rates:12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s; 48 Mb/s
                              54 Mb/s
                    Mode:Master
                    Extra:tsf=0000063ff5d8b824
                    Extra: Last beacon: 4592ms ago
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : CCMP
                        Pairwise Ciphers (1) : CCMP
                        Authentication Suites (1) : 802.1x
          Cell 09 - Address: <MAC 'eduroam' [AC9]>
                    Channel:11
                    Frequency:2.462 GHz (Channel 11)
                    Quality=24/70  Signal level=-86 dBm 
                    Encryption key:on
                    ESSID:"eduroam"
                    Bit Rates:12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s; 48 Mb/s
                              54 Mb/s
                    Mode:Master
                    Extra:tsf=000000d27b562824
                    Extra: Last beacon: 4392ms ago
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : CCMP
                        Pairwise Ciphers (1) : CCMP
                        Authentication Suites (1) : 802.1x

##### module infos ######################

[iwldvm]
filename:       /lib/modules/4.10.0-37-generic/kernel/drivers/net/wireless/intel/iwlwifi/dvm/iwldvm.ko
license:        GPL
author:         Copyright(c) 2003- 2015 Intel Corporation <linuxwifi@intel.com>
description:    Intel(R) Wireless WiFi Link AGN driver for Linux
srcversion:     62AB06F76928D08BDC96CD5
depends:        mac80211,iwlwifi,cfg80211
intree:         Y
vermagic:       4.10.0-37-generic SMP mod_unload
parm:           force_cam:force continuously aware mode (no power saving at all) (bool)

[mac80211]
filename:       /lib/modules/4.10.0-37-generic/kernel/net/mac80211/mac80211.ko
license:        GPL
description:    IEEE 802.11 subsystem
srcversion:     309C9ACED540FCAA1DE7422
depends:        cfg80211
intree:         Y
vermagic:       4.10.0-37-generic SMP mod_unload
parm:           minstrel_vht_only:Use only VHT rates when VHT is supported by sta. (bool)
parm:           max_nullfunc_tries:Maximum nullfunc tx tries before disconnecting (reason 4). (int)
parm:           max_probe_tries:Maximum probe tries before disconnecting (reason 4). (int)
parm:           beacon_loss_count:Number of beacon intervals before we decide beacon was lost. (int)
parm:           probe_wait_ms:Maximum time(ms) to wait for probe response before disconnecting (reason 4). (int)
parm:           ieee80211_default_rc_algo:Default rate control algorithm for mac80211 to use (charp)

[iwlwifi]
filename:       /lib/modules/4.10.0-37-generic/kernel/drivers/net/wireless/intel/iwlwifi/iwlwifi.ko
license:        GPL
author:         Copyright(c) 2003- 2015 Intel Corporation <linuxwifi@intel.com>
description:    Intel(R) Wireless WiFi driver for Linux
firmware:       iwlwifi-100-5.ucode
firmware:       iwlwifi-1000-5.ucode
firmware:       iwlwifi-135-6.ucode
firmware:       iwlwifi-105-6.ucode
firmware:       iwlwifi-2030-6.ucode
firmware:       iwlwifi-2000-6.ucode
firmware:       iwlwifi-5150-2.ucode
firmware:       iwlwifi-5000-5.ucode
firmware:       iwlwifi-6000g2b-6.ucode
firmware:       iwlwifi-6000g2a-6.ucode
firmware:       iwlwifi-6050-5.ucode
firmware:       iwlwifi-6000-6.ucode
firmware:       iwlwifi-7265D-26.ucode
firmware:       iwlwifi-7265-17.ucode
firmware:       iwlwifi-3168-26.ucode
firmware:       iwlwifi-3160-17.ucode
firmware:       iwlwifi-7260-17.ucode
firmware:       iwlwifi-8265-26.ucode
firmware:       iwlwifi-8000C-26.ucode
firmware:       iwlwifi-9000-pu-a0-lc-a0--26.ucode
firmware:       iwlwifi-9260-th-a0-jf-a0--26.ucode
firmware:       iwlwifi-9000-pu-a0-jf-a0--26.ucode
firmware:       iwlwifi-Qu-a0-jf-b0--26.ucode
srcversion:     F8F4E503BE16838CB3C1ADC
depends:        cfg80211
intree:         Y
vermagic:       4.10.0-37-generic SMP mod_unload
parm:           swcrypto:using crypto in software (default 0 [hardware]) (int)
parm:           11n_disable:disable 11n functionality, bitmap: 1: full, 2: disable agg TX, 4: disable agg RX, 8 enable agg TX (uint)
parm:           amsdu_size:amsdu size 0: 12K for multi Rx queue devices, 4K for other devices 1:4K 2:8K 3:12K (default 0) (int)
parm:           fw_restart:restart firmware in case of error (default true) (bool)
parm:           antenna_coupling:specify antenna coupling in dB (default: 0 dB) (int)
parm:           nvm_file:NVM file name (charp)
parm:           d0i3_disable:disable d0i3 functionality (default: Y) (bool)
parm:           lar_disable:disable LAR functionality (default: N) (bool)
parm:           uapsd_disable:disable U-APSD functionality bitmap 1: BSS 2: P2P Client (default: 3) (uint)
parm:           bt_coex_active:enable wifi/bt co-exist (default: enable) (bool)
parm:           led_mode:0=system default, 1=On(RF On)/Off(RF Off), 2=blinking, 3=Off (default: 0) (int)
parm:           power_save:enable WiFi power management (default: disable) (bool)
parm:           power_level:default power save level (range from 1 - 5, default: 1) (int)
parm:           fw_monitor:firmware monitor - to debug FW (default: false - needs lots of memory) (bool)
parm:           d0i3_timeout:Timeout to D0i3 entry when idle (ms) (uint)
parm:           disable_11ac:Disable VHT capabilities (default: false) (bool)

[cfg80211]
filename:       /lib/modules/4.10.0-37-generic/kernel/net/wireless/cfg80211.ko
description:    wireless configuration support
license:        GPL
author:         Johannes Berg
srcversion:     D77C8F93375950F3BA95B16
depends:       
intree:         Y
vermagic:       4.10.0-37-generic SMP mod_unload
parm:           bss_entries_limit:limit to number of scan BSS entries (per wiphy, default 1000) (int)
parm:           ieee80211_regdom:IEEE 802.11 regulatory domain code (charp)
parm:           cfg80211_disable_40mhz_24ghz:Disable 40MHz support in the 2.4GHz band (bool)

##### module parameters #################

[iwldvm]
force_cam: Y

[mac80211]
beacon_loss_count: 7
ieee80211_default_rc_algo: minstrel_ht
max_nullfunc_tries: 2
max_probe_tries: 5
minstrel_vht_only: Y
probe_wait_ms: 500

[iwlwifi]
11n_disable: 1
amsdu_size: 0
antenna_coupling: 0
bt_coex_active: Y
d0i3_disable: Y
d0i3_timeout: 1000
disable_11ac: N
fw_monitor: N
fw_restart: Y
lar_disable: N
led_mode: 0
nvm_file: (null)
power_level: 0
power_save: N
swcrypto: 0
uapsd_disable: 3

[cfg80211]
bss_entries_limit: 1000
cfg80211_disable_40mhz_24ghz: N
ieee80211_regdom: 00

##### /etc/modules ######################

##### modprobe options ##################

[/etc/modprobe.d/blacklist-ath_pci.conf]
blacklist ath_pci

[/etc/modprobe.d/blacklist.conf]
blacklist evbug
blacklist usbmouse
blacklist usbkbd
blacklist eepro100
blacklist de4x5
blacklist eth1394
blacklist snd_intel8x0m
blacklist snd_aw2
blacklist i2c_i801
blacklist prism54
blacklist bcm43xx
blacklist garmin_gps
blacklist asus_acpi
blacklist snd_pcsp
blacklist pcspkr
blacklist amd76x_edac

[/etc/modprobe.d/blacklist-rare-network.conf]
alias net-pf-3 off
alias net-pf-6 off
alias net-pf-9 off
alias net-pf-11 off
alias net-pf-12 off
alias net-pf-19 off
alias net-pf-21 off
alias net-pf-36 off

[/etc/modprobe.d/intel-microcode-blacklist.conf]
blacklist microcode

[/etc/modprobe.d/iwlwifi.conf]
remove iwlwifi \
(/sbin/lsmod | grep -o -e ^iwlmvm -e ^iwldvm -e ^iwlwifi | xargs /sbin/rmmod) \
&& /sbin/modprobe -r mac80211

[/etc/modprobe.d/mlx4.conf]
softdep mlx4_core post: mlx4_en

##### rc.local ##########################

exit 0

##### pm-utils ##########################

[/etc/pm/power.d/disable_wol] (777 root)
CONFFILE=/etc/default/tlp
LIBDIR='/usr/lib/pm-utils'
if [ -d "$LIBDIR/power.d" ]; then
    # pm-utils script dir exists
    blocked="$LIBDIR/power.d/${0##*/}"
    if [ -x "$blocked" ]; then
        # overridable pm-utils script exists --> check if TLP enabled
        if [ -e "$CONFFILE" ] && . "$CONFFILE" && [ "$TLP_ENABLE" = '1' ]; then
            # TLP is enabled --> disable $blocked
            echo "Notice: '${blocked}' disabled by TLP."
        else
            exec "$blocked" $*
        fi
    fi # else: nothing to disable -> don't read $CONFFILE
fi
exit 0

[/etc/pm/power.d/laptop-mode] (777 root)
CONFFILE=/etc/default/tlp
LIBDIR='/usr/lib/pm-utils'
if [ -d "$LIBDIR/power.d" ]; then
    # pm-utils script dir exists
    blocked="$LIBDIR/power.d/${0##*/}"
    if [ -x "$blocked" ]; then
        # overridable pm-utils script exists --> check if TLP enabled
        if [ -e "$CONFFILE" ] && . "$CONFFILE" && [ "$TLP_ENABLE" = '1' ]; then
            # TLP is enabled --> disable $blocked
            echo "Notice: '${blocked}' disabled by TLP."
        else
            exec "$blocked" $*
        fi
    fi # else: nothing to disable -> don't read $CONFFILE
fi
exit 0

[/etc/pm/power.d/pci_devices] (777 root)
CONFFILE=/etc/default/tlp
LIBDIR='/usr/lib/pm-utils'
if [ -d "$LIBDIR/power.d" ]; then
    # pm-utils script dir exists
    blocked="$LIBDIR/power.d/${0##*/}"
    if [ -x "$blocked" ]; then
        # overridable pm-utils script exists --> check if TLP enabled
        if [ -e "$CONFFILE" ] && . "$CONFFILE" && [ "$TLP_ENABLE" = '1' ]; then
            # TLP is enabled --> disable $blocked
            echo "Notice: '${blocked}' disabled by TLP."
        else
            exec "$blocked" $*
        fi
    fi # else: nothing to disable -> don't read $CONFFILE
fi
exit 0

[/etc/pm/power.d/pcie_aspm] (777 root)
CONFFILE=/etc/default/tlp
LIBDIR='/usr/lib/pm-utils'
if [ -d "$LIBDIR/power.d" ]; then
    # pm-utils script dir exists
    blocked="$LIBDIR/power.d/${0##*/}"
    if [ -x "$blocked" ]; then
        # overridable pm-utils script exists --> check if TLP enabled
        if [ -e "$CONFFILE" ] && . "$CONFFILE" && [ "$TLP_ENABLE" = '1' ]; then
            # TLP is enabled --> disable $blocked
            echo "Notice: '${blocked}' disabled by TLP."
        else
            exec "$blocked" $*
        fi
    fi # else: nothing to disable -> don't read $CONFFILE
fi
exit 0

[/etc/pm/power.d/sched-powersave] (777 root)
CONFFILE=/etc/default/tlp
LIBDIR='/usr/lib/pm-utils'
if [ -d "$LIBDIR/power.d" ]; then
    # pm-utils script dir exists
    blocked="$LIBDIR/power.d/${0##*/}"
    if [ -x "$blocked" ]; then
        # overridable pm-utils script exists --> check if TLP enabled
        if [ -e "$CONFFILE" ] && . "$CONFFILE" && [ "$TLP_ENABLE" = '1' ]; then
            # TLP is enabled --> disable $blocked
            echo "Notice: '${blocked}' disabled by TLP."
        else
            exec "$blocked" $*
        fi
    fi # else: nothing to disable -> don't read $CONFFILE
fi
exit 0

[/etc/pm/power.d/usb_bluetooth] (777 root)
CONFFILE=/etc/default/tlp
LIBDIR='/usr/lib/pm-utils'
if [ -d "$LIBDIR/power.d" ]; then
    # pm-utils script dir exists
    blocked="$LIBDIR/power.d/${0##*/}"
    if [ -x "$blocked" ]; then
        # overridable pm-utils script exists --> check if TLP enabled
        if [ -e "$CONFFILE" ] && . "$CONFFILE" && [ "$TLP_ENABLE" = '1' ]; then
            # TLP is enabled --> disable $blocked
            echo "Notice: '${blocked}' disabled by TLP."
        else
            exec "$blocked" $*
        fi
    fi # else: nothing to disable -> don't read $CONFFILE
fi
exit 0

[/etc/pm/power.d/wireless] (777 root)
CONFFILE=/etc/default/tlp
LIBDIR='/usr/lib/pm-utils'
if [ -d "$LIBDIR/power.d" ]; then
    # pm-utils script dir exists
    blocked="$LIBDIR/power.d/${0##*/}"
    if [ -x "$blocked" ]; then
        # overridable pm-utils script exists --> check if TLP enabled
        if [ -e "$CONFFILE" ] && . "$CONFFILE" && [ "$TLP_ENABLE" = '1' ]; then
            # TLP is enabled --> disable $blocked
            echo "Notice: '${blocked}' disabled by TLP."
        else
            exec "$blocked" $*
        fi
    fi # else: nothing to disable -> don't read $CONFFILE
fi
exit 0

[/etc/pm/power.d/xfs_buffer] (777 root)
CONFFILE=/etc/default/tlp
LIBDIR='/usr/lib/pm-utils'
if [ -d "$LIBDIR/power.d" ]; then
    # pm-utils script dir exists
    blocked="$LIBDIR/power.d/${0##*/}"
    if [ -x "$blocked" ]; then
        # overridable pm-utils script exists --> check if TLP enabled
        if [ -e "$CONFFILE" ] && . "$CONFFILE" && [ "$TLP_ENABLE" = '1' ]; then
            # TLP is enabled --> disable $blocked
            echo "Notice: '${blocked}' disabled by TLP."
        else
            exec "$blocked" $*
        fi
    fi # else: nothing to disable -> don't read $CONFFILE
fi
exit 0

##### udev rules ########################

##### dmesg #############################

[ 1944.674879] iwlwifi 0000:01:00.0: CONFIG_IWLWIFI_DEVICE_TRACING enabled
[ 1944.674882] iwlwifi 0000:01:00.0: Detected Intel(R) Centrino(R) Advanced-N 6235 AGN, REV=0xB0
[ 1944.677025] iwlwifi 0000:01:00.0: L1 Enabled - LTR Disabled
[ 1944.699382] ieee80211 phy0: Selected rate control algorithm 'iwl-agn-rs'
[ 1944.707131] iwlwifi 0000:01:00.0 wlp1s0: renamed from wlan0
[ 1944.735000] IPv6: ADDRCONF(NETDEV_UP): wlp1s0: link is not ready
[ 1944.737213] iwlwifi 0000:01:00.0: L1 Enabled - LTR Disabled (repeated 2 times)
[ 1944.744055] iwlwifi 0000:01:00.0: Radio type=0x2-0x1-0x0
[ 1945.027787] iwlwifi 0000:01:00.0: L1 Enabled - LTR Disabled (repeated 2 times)
[ 1945.034699] iwlwifi 0000:01:00.0: Radio type=0x2-0x1-0x0
[ 1945.119088] IPv6: ADDRCONF(NETDEV_UP): wlp1s0: link is not ready (repeated 2 times)
[ 1947.583733] iwlwifi 0000:01:00.0: L1 Enabled - LTR Disabled (repeated 2 times)
[ 1947.590606] iwlwifi 0000:01:00.0: Radio type=0x2-0x1-0x0
[ 1947.877075] iwlwifi 0000:01:00.0: L1 Enabled - LTR Disabled (repeated 2 times)
[ 1947.883972] iwlwifi 0000:01:00.0: Radio type=0x2-0x1-0x0
[ 1947.971308] IPv6: ADDRCONF(NETDEV_UP): wlp1s0: link is not ready
[ 1948.276465] r8169 0000:02:00.0 enp2s0: link down
[ 1948.276702] IPv6: ADDRCONF(NETDEV_UP): enp2s0: link is not ready
[ 1958.742243] IPv6: ADDRCONF(NETDEV_UP): wlp1s0: link is not ready
[ 1958.748615] IPv6: ADDRCONF(NETDEV_UP): enp2s0: link is not ready
[ 1958.892904] IPv6: ADDRCONF(NETDEV_UP): wlp1s0: link is not ready
[ 1963.651081] wlp1s0: authenticate with <MAC 'UoN-guest' [AC1]>
[ 1963.654190] wlp1s0: send auth to <MAC 'UoN-guest' [AC1]> (try 1/3)
[ 1963.730656] wlp1s0: authenticated
[ 1963.733391] wlp1s0: associate with <MAC 'UoN-guest' [AC1]> (try 1/3)
[ 1963.735937] wlp1s0: RX AssocResp from <MAC 'UoN-guest' [AC1]> (capab=0x101 status=0 aid=1)
[ 1963.738553] wlp1s0: associated
[ 1963.738666] IPv6: ADDRCONF(NETDEV_CHANGE): wlp1s0: link becomes ready
[ 1963.833978] wlp1s0: Limiting TX power to 17 dBm as advertised by <MAC 'UoN-guest' [AC1]>
[ 3773.680343] wlp1s0: disassociated from <MAC 'UoN-guest' [AC1]> (Reason: 1)
[ 3773.861187] wlp1s0: authenticate with <MAC 'UoN-guest' [AC5]>
[ 3773.863475] wlp1s0: send auth to <MAC 'UoN-guest' [AC5]> (try 1/3)
[ 3773.940331] wlp1s0: authenticated
[ 3773.942624] wlp1s0: associate with <MAC 'UoN-guest' [AC5]> (try 1/3)
[ 3774.046608] wlp1s0: associate with <MAC 'UoN-guest' [AC5]> (try 2/3)
[ 3774.053673] wlp1s0: RX AssocResp from <MAC 'UoN-guest' [AC5]> (capab=0x101 status=0 aid=1)
[ 3774.056240] wlp1s0: associated
[ 3774.148214] wlp1s0: Limiting TX power to 17 dBm as advertised by <MAC 'UoN-guest' [AC5]>
[ 3841.609529] wlp1s0: disconnect from AP <MAC 'UoN-guest' [AC5]> for new auth to <MAC address>
[ 3841.611881] wlp1s0: authenticate with <MAC address>
[ 3841.613982] wlp1s0: send auth to <MAC address> (try 1/3)
[ 3841.615768] wlp1s0: authenticated
[ 3841.618522] wlp1s0: associate with <MAC address> (try 1/3)
[ 3841.622139] wlp1s0: RX AssocResp from <MAC address> (capab=0x421 status=0 aid=2)
[ 3841.625803] wlp1s0: associated
[ 3841.686373] wlp1s0: Limiting TX power to 14 dBm as advertised by <MAC address>
[ 3866.701138] wlp1s0: deauthenticating from <MAC address> by local choice (Reason: 3=DEAUTH_LEAVING)
[ 3867.012108] IPv6: ADDRCONF(NETDEV_UP): wlp1s0: link is not ready
[ 3867.018050] IPv6: ADDRCONF(NETDEV_UP): enp2s0: link is not ready
[ 3867.161284] IPv6: ADDRCONF(NETDEV_UP): wlp1s0: link is not ready
[ 3871.834075] iwlwifi 0000:01:00.0: L1 Enabled - LTR Disabled (repeated 2 times)
[ 3871.840964] iwlwifi 0000:01:00.0: Radio type=0x2-0x1-0x0
[ 3872.126311] iwlwifi 0000:01:00.0: L1 Enabled - LTR Disabled (repeated 2 times)
[ 3872.133216] iwlwifi 0000:01:00.0: Radio type=0x2-0x1-0x0
[ 3872.220350] IPv6: ADDRCONF(NETDEV_UP): wlp1s0: link is not ready
[ 3872.510703] r8169 0000:02:00.0 enp2s0: link down
[ 3872.510823] IPv6: ADDRCONF(NETDEV_UP): enp2s0: link is not ready
[ 3921.123005] IPv6: ADDRCONF(NETDEV_UP): wlp1s0: link is not ready
[ 3921.128123] IPv6: ADDRCONF(NETDEV_UP): enp2s0: link is not ready
[ 3921.284751] IPv6: ADDRCONF(NETDEV_UP): wlp1s0: link is not ready
[ 3925.947275] wlp1s0: authenticate with <MAC 'UoN-guest' [AC1]>
[ 3925.949954] wlp1s0: send auth to <MAC 'UoN-guest' [AC1]> (try 1/3)
[ 3925.999521] wlp1s0: authenticated
[ 3926.001291] wlp1s0: associate with <MAC 'UoN-guest' [AC1]> (try 1/3)
[ 3926.105286] wlp1s0: associate with <MAC 'UoN-guest' [AC1]> (try 2/3)
[ 3926.111755] wlp1s0: RX AssocResp from <MAC 'UoN-guest' [AC1]> (capab=0x101 status=0 aid=1)
[ 3926.114332] wlp1s0: associated
[ 3926.114473] IPv6: ADDRCONF(NETDEV_CHANGE): wlp1s0: link becomes ready
[ 3926.207404] wlp1s0: Limiting TX power to 17 dBm as advertised by <MAC 'UoN-guest' [AC1]>
[ 4661.815911] wlp1s0: deauthenticating from <MAC 'UoN-guest' [AC1]> by local choice (Reason: 3=DEAUTH_LEAVING)
[ 4665.858025] iwlwifi 0000:01:00.0: L1 Enabled - LTR Disabled (repeated 2 times)
[ 4665.864844] iwlwifi 0000:01:00.0: Radio type=0x2-0x1-0x0
[ 4666.160070] iwlwifi 0000:01:00.0: L1 Enabled - LTR Disabled (repeated 2 times)
[ 4666.166952] iwlwifi 0000:01:00.0: Radio type=0x2-0x1-0x0
[ 4666.253765] IPv6: ADDRCONF(NETDEV_UP): wlp1s0: link is not ready
[ 4666.518413] r8169 0000:02:00.0 enp2s0: link down
[ 4666.518513] IPv6: ADDRCONF(NETDEV_UP): enp2s0: link is not ready
[ 4748.161399] IPv6: ADDRCONF(NETDEV_UP): wlp1s0: link is not ready
[ 4748.166635] IPv6: ADDRCONF(NETDEV_UP): enp2s0: link is not ready
[ 4748.298447] IPv6: ADDRCONF(NETDEV_UP): wlp1s0: link is not ready
[ 4851.153481] wlp1s0: authenticate with <MAC 'UoN-guest' [AC1]>
[ 4851.154514] wlp1s0: send auth to <MAC 'UoN-guest' [AC1]> (try 1/3)
[ 4851.155605] wlp1s0: authenticated
[ 4851.157196] wlp1s0: associate with <MAC 'UoN-guest' [AC1]> (try 1/3)
[ 4851.159765] wlp1s0: RX AssocResp from <MAC 'UoN-guest' [AC1]> (capab=0x101 status=0 aid=1)
[ 4851.162017] wlp1s0: associated
[ 4851.162084] IPv6: ADDRCONF(NETDEV_CHANGE): wlp1s0: link becomes ready
[ 4851.256283] wlp1s0: Limiting TX power to 17 dBm as advertised by <MAC 'UoN-guest' [AC1]>

########## wireless info END ############

JeremyB
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Re: Wifi Intermittent on Samsung Series 9 laptop

Postby JeremyB » Fri Oct 20, 2017 4:58 pm

There is no conflict about removing network manager if you are using Cinnamon, it will remove Cinnamon.
Did you disable wifi powermanagement with a command similar to

Code: Select all

sudo sed -i 's/wifi.powersave = .*/wifi.powersave = 2/' /etc/NetworkManager/conf.d/default-wifi-powersave-on.conf

I would also try setting the iwlwifi 11n_disable parameter to 8
This might be a issue with 5Ghz rather than 2.4 Ghz as I have seen the signal strength have very wide swings using 5Ghz where 2.4 Ghz is stable
If you want to disable network manager to use wicd, do

Code: Select all

systemctl disable network-manager.service

reboot if you need to use network manager in the future

Code: Select all

systemctl enable network-manager.service

You may have to enter your password twice after running the command

gtj
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Re: Wifi Intermittent on Samsung Series 9 laptop

Postby gtj » Sat Oct 21, 2017 5:56 am

Thank you so much for your detailed response.

Code: Select all

sudo sed -i 's/wifi.powersave = .*/wifi.powersave = 2/' /etc/NetworkManager/conf.d/default-wifi-powersave-on.conf


reruns an error. However, I can see in /etc/NetworkManager/conf.d that powersave is set to ''2''.

I also tried disabling parameter 8 on iwlwifi 11n driver but did not help while WICD does not work at all. It scans and finds available networks but when I connect to them, there's no internet.

Should I buy and install an Intel 7260 plus? Will it help being that a newer hardware device as opposed to my old 6235?

I don't know what else I should try...

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catweazel
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Re: Wifi Intermittent on Samsung Series 9 laptop

Postby catweazel » Sat Oct 21, 2017 6:03 am

gtj wrote:I don't know what else I should try...

You might try telling us what the error is.
If your problem is fixed, please mark your thread as [SOLVED] by editing the title of the first message in the thread.

gtj
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Re: Wifi Intermittent on Samsung Series 9 laptop

Postby gtj » Sat Oct 21, 2017 6:07 am

catweazel wrote:
gtj wrote:I don't know what else I should try...

You might try telling us what the error is.


Thanks for your reply.
The error I was getting was probably due to ''sudo''. I re-run it as root and did not return any errors.
However, the powersave option hasn't changed. It was and still is set to 2.

gtj
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Re: Wifi Intermittent on Samsung Series 9 laptop

Postby gtj » Sat Oct 21, 2017 5:18 pm

I just found a very cheap ($5) Atheros AR5B22 on Ebay which works in Linux with the well supported ath9k driver.

I bought it. I will check if it fixes the problem and will report back.

gtj
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Re: Wifi Intermittent on Samsung Series 9 laptop

Postby gtj » Tue Oct 24, 2017 5:55 pm

Just an update on this.
Today I installed the Atheros AR5B22 and my laptop's behavior has not changed with regards to unreliable network connection.

This means that the problem either lies on the network(not possible as I didn't have issues with windows previously) or on the OS itself.

Next thing I'm going to try is another distro as I want to take all my chances to stay Linux before returning to Windows...

JeremyB
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Re: Wifi Intermittent on Samsung Series 9 laptop

Postby JeremyB » Tue Oct 24, 2017 5:59 pm

I would suspect issues with the wireless router at this point. I would at least restart the router

gtj
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Re: Wifi Intermittent on Samsung Series 9 laptop

Postby gtj » Tue Oct 24, 2017 6:02 pm

JeremyB wrote:I would suspect issues with the wireless router at this point. I would at least restart the router


I thought about that but I can't obviously as I'm having to do with Uni's guest network. Therefore, there is no access to such settings and also the possibility of it having an issue is quite thin. At the time I write this, my Android phone is also connected to the same network with no problems.

JeremyB
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Re: Wifi Intermittent on Samsung Series 9 laptop

Postby JeremyB » Tue Oct 24, 2017 6:18 pm

The alternative might be to turn off cell data on the phone and use it to USB tether to the computer

gtj
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Re: Wifi Intermittent on Samsung Series 9 laptop

Postby gtj » Tue Oct 24, 2017 6:22 pm

Yes that's not a bad idea. I might try it.

For the time being, I applied another possible fix and will see how it goes
https://askubuntu.com/questions/85214/how-can-i-prevent-iwconfig-power-management-from-being-turned-on

JeremyB
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Re: Wifi Intermittent on Samsung Series 9 laptop

Postby JeremyB » Tue Oct 24, 2017 6:34 pm

gtj wrote:Yes that's not a bad idea. I might try it.

For the time being, I applied another possible fix and will see how it goes
https://askubuntu.com/questions/85214/how-can-i-prevent-iwconfig-power-management-from-being-turned-on

My first post in this thread should have disabled power management on wifi, similar to https://askubuntu.com/a/860754/300665 but easier to do for new users

gtj
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Re: Wifi Intermittent on Samsung Series 9 laptop

Postby gtj » Tue Oct 24, 2017 6:41 pm

JeremyB wrote:
gtj wrote:Yes that's not a bad idea. I might try it.

For the time being, I applied another possible fix and will see how it goes
https://askubuntu.com/questions/85214/how-can-i-prevent-iwconfig-power-management-from-being-turned-on

My first post in this thread should have disabled power management on wifi, similar to https://askubuntu.com/a/860754/300665 but easier to do for new users


Yes, I did it as you suggested but thought about applying that one even it being surplus just in case the wifi power management is being (re)enabled somehow. I'm just trying all possible reasons for the issue.

For the time being, I haven't had a drop for almost half an hour now. Let's see how it goes.

Thank you very much for all your help and support!


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