Home WiFi became unusable

Questions about Wi-Fi and other network devices, file sharing, firewalls, connection sharing etc
Forum rules
Before you post read how to get help. Topics in this forum are automatically closed 6 months after creation.
Locked
Yaroslav_P
Level 1
Level 1
Posts: 2
Joined: Thu Jun 17, 2021 8:33 am

Home WiFi became unusable

Post by Yaroslav_P »

Dear community,
My home WiFi from TP-LINK became unusable for my ThinkPad laptop with Linux Mint Tina after returning from the trip.
Perhaps some networks where I connected during the trip triggered some changes in setting on my laptop.
It is expressed in big delays of packages, random stalls etc.
When I initiate connecting to my home WiFi, first half a minute it even can't resolve DNS, for example, ping youtube.com results in Name or service not known.
After some time the command starts to bring packages but randomly stalls for a long time.

This home network worked fine previously with my laptop.
It still does for smartphone (no delays for Internet) and the router works fine for desktop with cable connection.
The laptop still works fast with other WiFi networks - the hotspot from the smartphone unfreezes the routing on the laptop.
I've read other topics here, regarding the power management setting, but I have an impression that the problem is not in that area.
Looks like some conflicting subnetworks, sorry if such suggestions sound lame.

I also noticed that Network Manager sometimes doesn't show all networks available or even hides the current network where it is connected too, but I'm not sure if such behavior is a new one.

I'll be grateful for any suggestions on how to troubleshoot. Below is the output from several commands found in parallel topic.

inxi -Fxpmrz

Code: Select all

System:    Host: iaroslav-ThinkPad-T440 Kernel: 4.15.0-54-generic x86_64 bits: 64 compiler: gcc v: 7.4.0 
           Desktop: Cinnamon 4.2.3 Distro: Linux Mint 19.2 Tina base: Ubuntu 18.04 bionic 
Machine:   Type: Laptop System: LENOVO product: 20B7S24H00 v: ThinkPad T440 serial: <filter> 
           Mobo: LENOVO model: 20B7S24H00 v: SDK0E50510 WIN serial: <filter> UEFI [Legacy]: LENOVO v: GJET79WW (2.29 ) 
           date: 09/03/2014 
Battery:   ID-1: BAT0 charge: 15.6 Wh condition: 16.2/23.2 Wh (70%) model: SANYO 45N1773 status: Unknown 
           ID-2: BAT1 charge: 17.3 Wh condition: 19.9/23.2 Wh (86%) model: SANYO 45N1775 status: Discharging 
Memory:    RAM: total: 11.43 GiB used: 2.99 GiB (26.2%) 
           RAM Report: permissions: Unable to run dmidecode. Root privileges required. 
CPU:       Topology: Dual Core model: Intel Core i5-4300U bits: 64 type: MT MCP arch: Haswell rev: 1 L2 cache: 3072 KiB 
           flags: lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 19952 
           Speed: 2635 MHz min/max: 800/2900 MHz Core speeds (MHz): 1: 2052 2: 1948 3: 2130 4: 2165 
Graphics:  Device-1: Intel Haswell-ULT Integrated Graphics vendor: Lenovo driver: i915 v: kernel bus ID: 00:02.0 
           Display: x11 server: X.Org 1.19.6 driver: modesetting unloaded: fbdev,vesa tty: N/A 
           OpenGL: renderer: Mesa DRI Intel Haswell Mobile v: 4.5 Mesa 19.0.2 direct render: Yes 
Audio:     Device-1: Intel Haswell-ULT HD Audio vendor: Lenovo driver: snd_hda_intel v: kernel bus ID: 00:03.0 
           Device-2: Intel 8 Series HD Audio vendor: Lenovo driver: snd_hda_intel v: kernel bus ID: 00:1b.0 
           Sound Server: ALSA v: k4.15.0-54-generic 
Network:   Device-1: Intel Ethernet I218-LM vendor: Lenovo ThinkPad X240 driver: e1000e v: 3.2.6-k port: 3080 bus ID: 00:19.0 
           IF: enp0s25 state: down mac: <filter> 
           Device-2: Intel Wireless 7260 driver: iwlwifi v: kernel port: efa0 bus ID: 03:00.0 
           IF: wlp3s0 state: up mac: <filter> 
           IF-ID-1: br-1e126edd0017 state: down mac: <filter> 
           IF-ID-2: br-25cb0ad59d4f state: down mac: <filter> 
           IF-ID-3: br-7394bc4bcf1c state: down mac: <filter> 
           IF-ID-4: br-ca51a1b7c651 state: down mac: <filter> 
           IF-ID-5: br-e6aab8bbd626 state: down mac: <filter> 
           IF-ID-6: docker0 state: down mac: <filter> 
Drives:    Local Storage: total: 465.76 GiB used: 102.87 GiB (22.1%) 
           ID-1: /dev/sda vendor: Western Digital model: WD5000BEVT-22A0RT0 size: 465.76 GiB 
Partition: ID-1: / size: 28.71 GiB used: 2.42 GiB (8.4%) fs: ext4 dev: /dev/sda4 
           ID-2: /boot size: 503.9 MiB used: 75.8 MiB (15.0%) fs: ext2 dev: /dev/sda2 
           ID-3: /home size: 350.84 GiB used: 73.59 GiB (21.0%) fs: ext4 dev: /dev/sda5 
           ID-4: /snap/core/11081 raw size: 99.0 MiB size: <root required> used: <root required> fs: squashfs dev: /dev/loop8 
           ID-5: /snap/core/11167 raw size: 99.2 MiB size: <root required> used: <root required> fs: squashfs dev: /dev/loop5 
           ID-6: /snap/core18/1997 raw size: 55.4 MiB size: <root required> used: <root required> fs: squashfs 
           dev: /dev/loop11 
           ID-7: /snap/core18/2066 raw size: 55.4 MiB size: <root required> used: <root required> fs: squashfs dev: /dev/loop1 
           ID-8: /snap/gnome-3-28-1804/145 raw size: 162.9 MiB size: <root required> used: <root required> fs: squashfs 
           dev: /dev/loop12 
           ID-9: /snap/gtk-common-themes/1514 raw size: 64.8 MiB size: <root required> used: <root required> fs: squashfs 
           dev: /dev/loop10 
           ID-10: /snap/gtk-common-themes/1515 raw size: 65.1 MiB size: <root required> used: <root required> fs: squashfs 
           dev: /dev/loop0 
           ID-11: /snap/intellij-idea-community/299 raw size: 714.1 MiB size: <root required> used: <root required> 
           fs: squashfs dev: /dev/loop9 
           ID-12: /snap/intellij-idea-community/302 raw size: 712.6 MiB size: <root required> used: <root required> 
           fs: squashfs dev: /dev/loop7 
           ID-13: /snap/notepad-plus-plus/258 raw size: 5.5 MiB size: <root required> used: <root required> fs: squashfs 
           dev: /dev/loop16 
           ID-14: /snap/notepad-plus-plus/260 raw size: 5.5 MiB size: <root required> used: <root required> fs: squashfs 
           dev: /dev/loop4 
           ID-15: /snap/tusk/29 raw size: 123.8 MiB size: <root required> used: <root required> fs: squashfs dev: /dev/loop17 
           ID-16: /snap/wine-platform-3-stable/10 raw size: 74.0 MiB size: <root required> used: <root required> fs: squashfs 
           dev: /dev/loop14 
           ID-17: /snap/wine-platform-3-stable/11 raw size: 99.5 MiB size: <root required> used: <root required> fs: squashfs 
           dev: /dev/loop15 
           ID-18: /snap/wine-platform-5-stable/13 raw size: 215.5 MiB size: <root required> used: <root required> fs: squashfs 
           dev: /dev/loop13 
           ID-19: /snap/wine-platform-5-stable/16 raw size: 303.1 MiB size: <root required> used: <root required> fs: squashfs 
           dev: /dev/loop3 
           ID-20: /snap/wine-platform-runtime/216 raw size: 337.7 MiB size: <root required> used: <root required> fs: squashfs 
           dev: /dev/loop2 
           ID-21: /snap/wine-platform-runtime/220 raw size: 337.7 MiB size: <root required> used: <root required> fs: squashfs 
           dev: /dev/loop6 
           ID-22: /usr size: 47.94 GiB used: 7.13 GiB (14.9%) fs: ext4 dev: /dev/sda6 
           ID-23: /var size: 28.91 GiB used: 19.66 GiB (68.0%) fs: ext4 dev: /dev/sda7 
           ID-24: swap-1 size: 24.0 MiB used: 0 KiB (0.0%) fs: swap dev: /dev/sda3 
Sensors:   System Temperatures: cpu: 56.0 C mobo: N/A 
           Fan Speeds (RPM): cpu: 2985 
Repos:     Active apt repos in: /etc/apt/sources.list 
           1: deb [arch=amd64] https://download.virtualbox.org/virtualbox/debian 'bionic' contribakvilon
           Active apt repos in: /etc/apt/sources.list.d/additional-repositories.list 
           1: deb [arch=amd64] https://download.docker.com/linux/ubuntu bionic stable
           Active apt repos in: /etc/apt/sources.list.d/addtional-repositories.list 
           1: deb [arch=amd64] https://download.docker.com/linux/ubuntu bionic stable
           Active apt repos in: /etc/apt/sources.list.d/google-chrome.list 
           1: deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main
           Active apt repos in: /etc/apt/sources.list.d/inkscape_dev-stable-bionic.list 
           1: deb http://ppa.launchpad.net/inkscape.dev/stable/ubuntu bionic main
           Active apt repos in: /etc/apt/sources.list.d/official-package-repositories.list 
           1: deb http://packages.linuxmint.com tina main upstream import backport #id:linuxmint_main
           2: deb http://archive.ubuntu.com/ubuntu bionic main restricted universe multiverse
           3: deb http://archive.ubuntu.com/ubuntu bionic-updates main restricted universe multiverse
           4: deb http://archive.ubuntu.com/ubuntu bionic-backports main restricted universe multiverse
           5: deb http://security.ubuntu.com/ubuntu/ bionic-security main restricted universe multiverse
           6: deb http://archive.canonical.com/ubuntu/ bionic partner
           Active apt repos in: /etc/apt/sources.list.d/openvpn3.list 
           1: deb https://swupdate.openvpn.net/community/openvpn3/repos bionic main
           Active apt repos in: /etc/apt/sources.list.d/sbt.list 
           1: deb https://dl.bintray.com/sbt/debian /
           Active apt repos in: /etc/apt/sources.list.d/skype-stable.list 
           1: deb [arch=amd64] https://repo.skype.com/deb stable main
           Active apt repos in: /etc/apt/sources.list.d/slack.list 
           1: deb https://packagecloud.io/slacktechnologies/slack/debian/ jessie main
Info:      Processes: 354 Uptime: 21h 07m Init: systemd runlevel: 5 Compilers: gcc: 7.5.0 Shell: bash v: 4.4.19 inxi: 3.0.32
iwconfig

Code: Select all

wlp3s0    IEEE 802.11  ESSID:"AkvilonYaryk"  
          Mode:Managed  Frequency:2.462 GHz  Access Point: E8:94:F6:4C:DC:1E   
          Bit Rate=150 Mb/s   Tx-Power=22 dBm   
          Retry short limit:7   RTS thr:off   Fragment thr:off
          Power Management:on
          Link Quality=70/70  Signal level=-23 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:158   Missed beacon:0

enp0s25   no wireless extensions.
br-7394bc4bcf1c  no wireless extensions.
br-e6aab8bbd626  no wireless extensions.
br-ca51a1b7c651  no wireless extensions.
br-25cb0ad59d4f  no wireless extensions.
lo        no wireless extensions.
docker0   no wireless extensions.
br-1e126edd0017  no wireless extensions.
lsusb

Code: Select all

Bus 001 Device 002: ID 8087:8000 Intel Corp. 
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 005: ID 5986:0268 Acer, Inc 
Bus 002 Device 003: ID 138a:0017 Validity Sensors, Inc. Fingerprint Reader
Bus 002 Device 002: ID 093a:2510 Pixart Imaging, Inc. Optical Mouse
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
lspci

Code: Select all

00:00.0 Host bridge: Intel Corporation Haswell-ULT DRAM Controller (rev 0b)
00:02.0 VGA compatible controller: Intel Corporation Haswell-ULT Integrated Graphics Controller (rev 0b)
00:03.0 Audio device: Intel Corporation Haswell-ULT HD Audio Controller (rev 0b)
00:14.0 USB controller: Intel Corporation 8 Series USB xHCI HC (rev 04)
00:16.0 Communication controller: Intel Corporation 8 Series HECI #0 (rev 04)
00:16.3 Serial controller: Intel Corporation 8 Series HECI KT (rev 04)
00:19.0 Ethernet controller: Intel Corporation Ethernet Connection I218-LM (rev 04)
00:1b.0 Audio device: Intel Corporation 8 Series HD Audio Controller (rev 04)
00:1c.0 PCI bridge: Intel Corporation 8 Series PCI Express Root Port 6 (rev e4)
00:1c.1 PCI bridge: Intel Corporation 8 Series PCI Express Root Port 3 (rev e4)
00:1d.0 USB controller: Intel Corporation 8 Series USB EHCI #1 (rev 04)
00:1f.0 ISA bridge: Intel Corporation 8 Series LPC Controller (rev 04)
00:1f.2 SATA controller: Intel Corporation 8 Series SATA Controller 1 [AHCI mode] (rev 04)
00:1f.3 SMBus: Intel Corporation 8 Series SMBus Controller (rev 04)
02:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS5227 PCI Express Card Reader (rev 01)
03:00.0 Network controller: Intel Corporation Wireless 7260 (rev 83)
Last edited by LockBot on Wed Dec 28, 2022 7:16 am, edited 1 time in total.
Reason: Topic automatically closed 6 months after creation. New replies are no longer allowed.
Top
sleeper12
Level 21
Level 21
Posts: 14558
Joined: Thu May 25, 2017 3:22 pm

Re: Home WiFi became unusable

Post by sleeper12 »

Turn power management off & see it if helps any:

Code: Select all

 sudo sed -i 's/3/2/' /etc/NetworkManager/conf.d/default-wifi-powersave-on.conf
Reboot

You could also update your kernel to 4.15.0-144. The 4.15.0-54 kernel you have is quite old.
Top
Yaroslav_P
Level 1
Level 1
Posts: 2
Joined: Thu Jun 17, 2021 8:33 am

Re: Home WiFi became unusable

Post by Yaroslav_P »

Hello,
I tried to boot from several flesh drives: Mint, Ubuntu, Puppy Linux.
In all cases, the pattern was the same: quick Internet with hotspot and handicapped work with the router.
This morning the laptop stopped working with the hotspot as well and refused to connect to router wifi at all.
Those were bad signs, perhaps the hardware started to malfunction.
I turned power management off, rebooted.
For some time there were difficulties with connecting to wifi, but in few minutes it connected, and the speed is awesome!
I rebooted to check if the connection persists, - it does.
So I don't know what happened, likely the hardware is gradually declining.
I don't attribute it to Linux malfunction.
So far wifi is working, but I will keep this topic to monitor the status for a while.
It's good if the power management settings did the miracle, but it was weird.
Top
Locked

Return to “Networking”