Score:1

22.04 unstable wifi Intel Corporation Alder Lake-P PCH CNVi WiFi [8086:51f0] (rev 01) kernel 5.19

td flag

My wifi connection keeps disconnecting frequently. It's pretty exhausting during meetings. I've searched how to resolve this bug and I found that it can be related to the kernel version (22-04-wifi-keeps-disconnecting-for-a-few-seconds-frequently). The actual kernel version is 5.19.0 :

(base) claire@claire:~$ uname -r
5.19.0-32-generic

I keep trying to downgrade the kernel (5.17.5 ?) with Ubuntu Mainline Kernel Installer following this tutorial How to downgrade the Ubuntu kernel.

However I have a problem during the step 3 :

Step 3: When you’ve finished installing the kernel, reboot. Then, on the Grub boot screen, choose “Advanced Options for Ubuntu” and load the downgraded kernel.

While I chose the kernel with Grub, I've got the error : error you need to load the kernel first.

Is it the right thing to do ?

Here the output of lspci -knn | grep Net -A3 :

0000:00:14.3 Network controller [0280]: Intel Corporation Alder Lake-P PCH CNVi WiFi [8086:51f0] (rev 01)
    DeviceName: Onboard - Ethernet
    Subsystem: Intel Corporation Device [8086:0094]
    Kernel driver in use: iwlwifi
Pilot6 avatar
cn flag
Please [edit] your question and add output of `lspci -knn | grep Net -A3` terminal command. This will show your wireless device. Installing an unsupported mainline kernel is not a good choice if even don't know what the problem is. The post you refer to is suggesting to install a newer kernel than it was used at that time in Ubuntu. And the question was about a specific wireless device. It is not a solution for each and every Wi-Fi in any case.
Makk Claire avatar
td flag
Thanks for your answer @Pilot6 , I edit my question with the output :)
Pilot6 avatar
cn flag
It should work OK. Disconnections way be related to something else, like too many neighbors, etc.
Makk Claire avatar
td flag
But my colleague, using the same version of ubuntu, next to me in the office, doesn't have this problem at all
Pilot6 avatar
cn flag
It could be a hardware problem too.
Makk Claire avatar
td flag
I had the problem with my previous computer, which was dying. I have a new one now. And I have still the problem.
Pilot6 avatar
cn flag
It is unfortunate. The device is a bit too new now.
Makk Claire avatar
td flag
What do you mean ? That I can't use ubuntu 22.04 with my laptop ?
Pilot6 avatar
cn flag
I mean that it is a new device, kernel support may be not perfect.
Score:2
pl flag

Some have reported success in editing /etc/modprobe.d/iwlwifi.conf and adding the following line.

options iwlwifi 11n_disable=1 swcrypto=1

You'll need to unload/reload the driver - or more simply restart the system - for the change to take effect.

Makk Claire avatar
td flag
I've done this. I'll let you know if the connection is less unstable :)
Makk Claire avatar
td flag
I did that but my wifi keep disconnecting often..
in flag
This works on Fedora. The file does not exist, but that's ok.
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