22.04, wifi keeps disconnecting for a few seconds frequently

My wifi connection keeps disconnecting frequently (say once in a couple of minutes) sometimes it gets back and sometimes I need to activate and deactivate aeroplane mode. I tried to change my network provider to make sure it is this laptop problem and not the internet I use. The same happened with ADSL connection, android hotspot, and TD LTE modem. Really annoying. Some info: output of lspci -knn | grep Net -A2:

02:00.0 Network controller [0280]: Qualcomm Atheros AR9485 Wireless Network Adapter [168c:0032] (rev 01) Subsystem: Lite-On Communications Inc AR9485 Wireless Network Adapter [11ad:6628] Kernel driver in use: ath9k Kernel modules: ath9k

and out put of grep wlan /var/log/kern.log:

Apr 17 21:26:24 mb-X202E kernel: [ 18.970719] ath9k 0000:02:00.0 wlp2s0: renamed from wlan0
Apr 17 23:49:29 mb-X202E kernel: [ 19.312256] ath9k 0000:02:00.0 wlp2s0: renamed from wlan0
Apr 18 00:30:25 mb-X202E kernel: [ 18.915112] ath9k 0000:02:00.0 wlp2s0: renamed from wlan0
Apr 18 12:26:07 mb-X202E kernel: [ 21.278385] ath9k 0000:02:00.0 wlp2s0: renamed from wlan0
Apr 18 22:21:55 mb-X202E kernel: [ 19.425881] ath9k 0000:02:00.0 wlp2s0: renamed from wlan0
Apr 21 19:56:26 mb-X202E kernel: [ 18.985724] ath9k 0000:02:00.0 wlp2s0: renamed from wlan0

Ubuntu 22.04

Gnome 42

Asus X202E

4 Answers

Similar behavior, wifi keeps disconnecting and malfunction

my hardware : laptop Asus N751JK Network controller: Qualcomm Atheros AR9462 Wireless Network Adapter (rev 01) Subsystem: AzureWave AR9462 Wireless Network Adapter

I was runing Ubuntu 20.10, 21.04 up to Ubuntu 21.10 with Kernel 5.13.0 without any problem. I migrated to Ubuntu 22.04 which installs Kernel 5.15 then the problems started. I upgraded and tested unsuccessfully the following Kernels : 5.15.28, 5.15.36, 5.16.14, 5.16.20, 5.17.4, 5.17.5

I disabled the power save as explained without improvement in any of the Kernels tested. Also the "intel_iommu=off" mentioned at Bug#994590 didn't help.

I downgraded and currently running without any problem using the Kernel 5.13.19-051319-generic.

There is no problem in my airpoint (router) nor my internet access, I have other different computers and devices working correctly on wifi. In addition the N751JK works correctly when using the Ethernet adapter for the physical cable.

more on this

Using the solution mentioned in @chili555 comment, I tried disabling Power saving and it worked sofar (at least for the recent 20 minutes which is a record):

sudo sed -i 's/3/2/' /etc/NetworkManager/conf.d/*

P.S: By the way, when I have set power mode to balanced in power settings, why there must be a power saving setting like that enabled?

Try:

sudo nano /etc/NetworkManager/conf.d/default-wifi-powersave-on.conf

And change wifi.powersave to 2

I tried most of the answers above, some of them worked but the problem started again after a couple of hours. Finally I installed a fresh Ubuntu and get rid of the disconnection syndrome but the same thing started to happen the day before yesterday.

At last my searches led to a bug with the 5.15 kernel and I found that there are many people facing the same problem with 5.15 and 5.16 kernels. I just updated to the latest kernel (5.17.7) and it has solved the problem for two days now.

I tried this solution to update to the latest kernel