Issues with Intel AC 7265

[LeTigre]

Hello,

i currently got a new Acer Aspire V 13 - v3-371-58DJ

and the WLan gives me a lot of trouble:
I can connect - and the NIC / wlan seems to be connected to the routers all the time. I don't seem to loose connection to the router (can see the device on the router management page) from the perspective of my Linux Mint Network Indicator (telling me I am at 90% and connected) everything seems to be fine too.

The issue I have, is that all of a sudden the transmission rate collapses to zero - even if everything seems to be fine. A friend of mine told me, that this could either be a NIC issue or a problem with the energy saving settings from the chipset.

What I did so far:
I installed newer kernels, as I read that there where issues with the intel 7265 drivers - as well as the newest driver from https://wireless.wiki.kernel.org/en/use ... rs/iwlwifi

I followed the steps from here too:
http://forums.linuxmint.com/viewtopic.php?f=53&t=188696

Still no luck!

Any help would be very appreciated!

Here is some of the often requested console output:

uname -r

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3.18.6-031806-generic

lspci -nnk | grep -iA2 net

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	Parse_Rendering * ] 3:55 
	01:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 0c)
		Subsystem: Acer Incorporated [ALI] Device [1025:0918]
		Kernel driver in use: r8169
	02:00.0 Network controller [0280]: Intel Corporation Wireless 7265 [8086:095a] (rev 48)
		Subsystem: Intel Corporation Dual Band Wireless-AC 7265 [8086:5010]
		Kernel driver in use: iwlwifi

sudo /usr/lib/linuxmint/mintWifi/mintWifi.py:

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	-------------------------
	* I. scanning WIFI PCI devices...
	  -- Intel Corporation Wireless 7265 (rev 48)
	      ==> PCI ID = 8086:095a (rev 48)
	-------------------------
	* II. querying ndiswrapper...
	-------------------------
	* III. querying iwconfig...
	eth0      no wireless extensions.

	wlan0     IEEE 802.11abgn  ESSID:"SandrasBox"  
	          Mode:Managed  Frequency:2.462 GHz  Access Point: 00:24:FE:A9:01:B2   
	          Bit Rate=1 Mb/s   Tx-Power=20 dBm   
	          Retry short limit:7   RTS thr:off   Fragment thr:off
	          Encryption key:off
	          Power Management:on
	          Link Quality=51/70  Signal level=-59 dBm  
	          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
	          Tx excessive retries:0  Invalid misc:4   Missed beacon:0

	lo        no wireless extensions.

	-------------------------
	* IV. querying ifconfig...
	eth0      Link encap:Ethernet  HWaddr 20:6a:8a:a8:55:12  
	          inet addr:192.168.178.25  Bcast:192.168.178.255  Mask:255.255.255.0
	          inet6 addr: fe80::226a:8aff:fea8:5512/64 Scope:Link
	          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
	          RX packets:23340 errors:0 dropped:0 overruns:0 frame:0
	          TX packets:15074 errors:0 dropped:0 overruns:0 carrier:0
	          collisions:0 txqueuelen:1000 
	          RX bytes:28701214 (28.7 MB)  TX bytes:1775943 (1.7 MB)

	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:1520 errors:0 dropped:0 overruns:0 frame:0
	          TX packets:1520 errors:0 dropped:0 overruns:0 carrier:0
	          collisions:0 txqueuelen:0 
	          RX bytes:138606 (138.6 KB)  TX bytes:138606 (138.6 KB)

	wlan0     Link encap:Ethernet  HWaddr 60:57:18:1c:3e:e6  
	          inet addr:192.168.178.31  Bcast:192.168.178.255  Mask:255.255.255.0
	          inet6 addr: fe80::6257:18ff:fe1c:3ee6/64 Scope:Link
	          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
	          RX packets:29283 errors:0 dropped:0 overruns:0 frame:0
	          TX packets:13797 errors:0 dropped:0 overruns:0 carrier:0
	          collisions:0 txqueuelen:1000 
	          RX bytes:39590652 (39.5 MB)  TX bytes:1633142 (1.6 MB)

	-------------------------
	* V. querying DHCP...
	RTNETLINK answers: File exists
	-------------------------
	* VI. querying nslookup google.com...
	Server:		192.168.178.1
	Address:	192.168.178.1#53

	Non-authoritative answer:
	Name:	google.com
	Address: 173.194.44.64
	Name:	google.com
	Address: 173.194.44.66
	Name:	google.com
	Address: 173.194.44.69
	Name:	google.com
	Address: 173.194.44.73
	Name:	google.com
	Address: 173.194.44.68
	Name:	google.com
	Address: 173.194.44.70
	Name:	google.com
	Address: 173.194.44.78
	Name:	google.com
	Address: 173.194.44.71
	Name:	google.com
	Address: 173.194.44.72
	Name:	google.com
	Address: 173.194.44.67
	Name:	google.com
	Address: 173.194.44.65

[JeremyB]

So what parameters are available to iwlwifi with that kernel?

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modinfo -p iwlwifi

[LeTigre]

Hey,
thx for your help:

the output of modinfo -p iwlwifi is:

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swcrypto:using crypto in software (default 0 [hardware]) (int)
11n_disable:disable 11n functionality, bitmap: 1: full, 2: disable agg TX, 4: disable agg RX, 8 enable agg TX (uint)
amsdu_size_8K:enable 8K amsdu size (default 0) (int)
fw_restart:restart firmware in case of error (default true) (bool)
antenna_coupling:specify antenna coupling in dB (default: 0 dB) (int)
wd_disable:Disable stuck queue watchdog timer 0=system default, 1=disable (default: 1) (int)
nvm_file:NVM file name (charp)
uapsd_disable:disable U-APSD functionality (default: N) (bool)
bt_coex_active:enable wifi/bt co-exist (default: enable) (bool)
led_mode:0=system default, 1=On(RF On)/Off(RF Off), 2=blinking, 3=Off (default: 0) (int)
power_save:enable WiFi power management (default: disable) (bool)
power_level:default power save level (range from 1 - 5, default: 1) (int)
fw_monitor:firmware monitor - to debug FW (default: false - needs lots of memory) (bool)

[JeremyB]

We will start with

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echo "options iwlwifi 11n_disable=8" | sudo tee -a /etc/modprobe.d/iwlwifi.conf

reboot and see how it works but power management is enabled for wifi and this might help

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sudo iwconfig wlan0 power off

[LeTigre]

Ok,

this actually did it. Connecting is awesomely fast and it seems that I have a very stable connection. Tested a bit and there where no flaws as far as I can tell. Thank you very very much JeremyB!
The power will drain faster now I guess. If you have a hint on how to deal with that I would be very thankfull. But even if not, this is already is a huge step forward for me!

Output of less /etc/modprobe.d/iwlwifi.conf

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# /etc/modprobe.d/iwlwifi.conf
# iwlwifi will dyamically load either iwldvm or iwlmvm depending on the
# microcode file installed on the system.  When removing iwlwifi, first
# remove the iwl?vm module and then iwlwifi.
remove iwlwifi \
(/sbin/lsmod | grep -o -e ^iwlmvm -e ^iwldvm -e ^iwlwifi | xargs /sbin/rmmod) \
&& /sbin/modprobe -r mac80211
options iwlwifi 11n_disable=8

Strange thing is: I did this (following your remark from here: http://forums.linuxmint.com/viewtopic.p ... 96#p977212)
Does this get whiped out with a kernel update? Or with a driver update?


So here a short writeup of what I did in case someone else is hitting the wall too:
1) Kernel Update to 3.18
http://www.yourownlinux.com/2015/02/how ... linux.html

2)
i run:

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sudo apt-get install linux-firmware-nonfree

3) i installed
https://wireless.wiki.kernel.org/en/use ... rs/iwlwifi

4) I set the country code:
(First thx to JeremyB here - for more information see link: http://forums.linuxmint.com/viewtopic.php?f=53&t=188696 if you want to know what happens here)
4.1: check if country is set correctly:

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iw reg get

Output:

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[b]country OO:[/b]   <<<< WRONG!!!
	(2400 - 2483 @ 40), (N/A, 20)
	(5150 - 5250 @ 40), (N/A, 20), NO-OUTDOOR
	(5250 - 5350 @ 40), (N/A, 20), NO-OUTDOOR, DFS
	(5470 - 5725 @ 40), (N/A, 26), DFS
	(57240 - 65880 @ 2160), (N/A, 40), NO-OUTDOOR

4.2: set it: (my country code is DE - so the following DE has obviously be replaced, if you are not from germany)

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sudo iw reg set DE
sudo sed -i 's/^REG.*=$/&DE/' /etc/default/crda

5. Followed the advice of JeremyB (see above)
5.1 Enable enable agg tx for the iwlwifi driver

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echo "options iwlwifi 11n_disable=8" | sudo tee -a /etc/modprobe.d/iwlwifi.conf

reboot
5.2 Disabled power management: << I only think this is what is happening!

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sudo iwconfig wlan0 power off

[JeremyB]

The .conf files in /etc/modprobe.d/ are not affected by new kernels

[niubboxp]

Hi all i have the same issue, i run with 17.2 i think to have the last kernel, should i follow the instruction or something is changed? I m a newbie so pls explain me in the easy way thanks

[niubboxp]

i've tryed but doesent worked for me, i hope this issue will disappear with the next release of mint :/

[ckayte]

I'm having problems with the same thing. Is it proper to create a new post or should this be kept here? I am also using the Intel AC 7265 with the same iwlwifi driver. I have set ipv6 to ignore and tried the suggestions here as well and my internet still keeps dropping. I typed up an introduction to post in the newbie forum here and when I clicked to post it, it was gone (my internet dropped in that short a period of time.) I just can't keep this thing going... the internet works fine in Windows 10 (I dual boot but I only use Windows now when I have to.... I don't want something as simple as the internet being a reason to have to boot into Windows.)

Please help. Thanks.

~ckayte

[JeremyB]

Post

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iwconfig; dpkg -l | grep -i tlp

[ckayte]

Thanks JeremyB. After I posted this message, I continued reading forum posts and found this link https://sites.google.com/site/easylinux ... eless-card . I followed the instructions for disabling power management there, after realizing that following a computer restart the power management was reset to "on." This seems to be keeping power management "off" but I haven't had a lot of time to test if this worked long term (I had to go out for several hours.) In case this didn't work, the results from:

iwconfig; dpkg -l | grep -i tlp

eth0 no wireless extensions.

wlan0 IEEE 802.11abgn ESSID:"DVW326.7BC6C0-2.4G"
Mode:Managed Frequency:2.462 GHz Access Point: EC:0E:C4:7B:C6:C0
Bit Rate=144.4 Mb/s Tx-Power=22 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:off
Link Quality=45/70 Signal level=-65 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:7 Invalid misc:1871 Missed beacon:0

lo no wireless extensions.

Thanks again.