Kernel v5.17.8 disabled my wifi

[devnulljp]

Lenovo Thinkpad P1 gen 3. Been running Kubuntu 22.04 since it became available with no problems. Been updating the kernel as they reach stable designation from here: https://kernel.ubuntu.com/~kernel-ppa/mainline/

Currently running 5.17.7-051707-generic

Upgraded to stable 5.17.8 and noticed the addition of iwlwifi modlue this time.
This completely disabled my wifi so I had to go back to 5.17.7 kernel.

Network controller [0280]: Intel Corporation Comet Lake PCH CNVi WiFi [8086:06f0]
Subsystem: Intel Corporation Comet Lake PCH CNVi WiFi [8086:0070]
Kernel driver in use: iwlwifi

Any idea what to do for future updates? What's wrong with the new module that it doesn't like my wifi card?

EDIT: Just tried it with the latest 5.17.9 from here: https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.17.9/
And same deal. IT disables my wifi.

Output of sudo nmcli dev with the 5.17.7 kernel

DEVICE TYPE STATE CONNECTION

wlp0s20f3wificonnected<my wifi network SSID>
tun0tunconnected (externally)tun0
p2p-dev-wlp0s20f3wifi-p2pdisconnected--
enx0050b68eb10aethernetunavailable--
loloopbackunmanaged--
gpd0tununmanaged--

Output with 5.17.9 kernel

DEVICE TYPE STATE CONNECTION

enx0050b68eb10a ethernet unavailable --
lo loopback unmanaged --
gpd0 tun unmanaged --

So it just doesn't see the wifi adapter

[rab0171610]

Upgraded to stable 5.17.8 and noticed the addition of iwlwifi modlue this time.
This completely disabled my wifi so I had to go back to 5.17.7 kernel.

What module was it using before? The same driver or a different one?

[rab0171610]

Stable in terms of kernel releases and stable everywhere else are not the same thing. You are using unsupported upstream Mainline kernels at your own risk. I use the liquorix kernels (zen kernels) in kubuntu with no issues so far. You could try that and see if the problem is still present. I need a newer kernel for my wifi drivers to work properly, otherwise I wouldnt be using a newer kernel than what is in the repos. Unless there is some advanced feature in the newer kernel versions, just stick with the one that works for your hardware. And do not continue to update unless you need to. If it hurts when you poke yourself in the eye, do not poke yourself in the eye is all I am saying. The newest kernel does not mean it is better. Every new kernel version released, although called stable, can contain experimental features and newer driver patches that may not always work with some hardware. If you want to help with the kernel development, please file a bug against the newer kernels so they can be made aware of the situation. We are not able to do that here.
Your subsystem info:
Main ; PCI Devices ; Vendor 8086 ; Device 8086:02f0 ; Subsystem 8086:02f0:8086 0070, (Vendor 8086)
Detailed info on how to file a bug report for your subsystem listed above can be found here:
https://wiki.ubuntu.com/Kernel/Bugs
It suggests using the mainline kernels first to see if there is still an issue, but that already applies to you. They ask that people consider filing a bug report in this case also to upstream. Filing a bug report can help them to fix it.
That link is at the bottom of the above page:
https://wiki.ubuntu.com/Bugs/Upstream/kernel

[claydoh]

Do note that Mainline kernels are not built with any modifications or extra modules that normal Ubuntu kernels are, and third party, external driver modules can break sometimes, and need modifications so they compile.

You can see info about the device: sudo lshw -C network
I imagine it will be missing the driver info, but it should still give useful info.

[devnulljp]

Thanks for input.
Yes, it's using the same iwlwifi driver. Previous kernel builds had a modules bundle that included the driver, while it's included as a separate module in 5.17.8 and 9
sudo lshw -C network shows the driver but it's missing a bunch of info in 5.17.8/9
In 5.17.7 (working)
*-network
description: Wireless interface
product: Comet Lake PCH CNVi WiFi
vendor: Intel Corporation
physical id: 14.3
bus info: pci@0000:00:14.3
logical name: wlp0s20f3
version: 00
serial: <my MAC address>
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlwifi driverversion=5.17.7-051707-generic firmware=68.01d30b0c.0 QuZ-a0-hr-b0-68.u ip=10.0.0.136 latency=0 link=
yes multicast=yes wireless=IEEE 802.11
resources: iomemory:400-3ff irq:16 memory:404011c000-404011ffff



In 5.17.8

*-network
description: Network controller
product: Comet Lake PCH CNVi WiFi
vendor: Intel Corporation
physical id: 14.3
bus info: pci@0000:00:14.3
version: 00
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix bus_master cap_list
configuration: driver=iwlwifi latency=0
resources: iomemory:400-3ff irq:16 memory:404011c000-404011ffff

Big differences highlighted.

But you're right, think I'm going to leave the kernel well enough alone and just stick with what's working.

[rab0171610]

I keep letting the kernel update and so far no problems. You could research the liquorix kernel for ubuntu. It is always updated to a new version. See if you have the same problem with that kernel. If so, you can always uninstall it.
https://liquorix.net/
There is also a xanmod kernel, but I have never used it because the liquorix kernel works for me so far.
https://xanmod.org/#install_via_apturl
Both kernels are said to be tweaked for better scheduling and responsiveness.
Easy to install and uninstall if they do not solve your problem. They could give you a chance to try the newest kernels if Mainline is not working properly on your hardware.

[rab0171610]

Anyway, If you decide to give the above a try, please post back about whether or not it has the same module issue with your wifi card. I am very cutrious to know if it is just an issue with the Mainline kernel or the newerupstream versions in general. If it does work, it gives other users an alternative to try if they want to keep trying out the latest kernel releases. If not, then they would know not to bother.

[TWPonKubuntu]

Kernel 5.17.x works well enough on my 64bit laptop, but it has a Broadcom wireless module bcm43142 which is no longer supported (word to the devs, bring this support back, please). I use an external USB wireless adapter now.

[rab0171610]

word to the devs

Please consider that this is not the place to send messages to the devs. It will not be seen. Devs do not troll user forums looking for possible bugs to fix for dissatisfied users. They have hundreds if not thousands of emails and bug reports to prioritize and sift through that were submitted through the proper channels. Keeping that in mind, please seek out the right place to file a bug report for your kernel and specific hardware so that the issue can be addressed properly. To avoid hijacking threads, I would also recommend that you start your own thread next time as your issue has nothing to do with the OP's issue.

[Snowhog]

devnulljp Do you have the dkms package installed?

[TWPonKubuntu]

Please consider that this is not the place to send messages to the devs. It will not be seen. Devs do not troll user forums looking for possible bugs to fix for dissatisfied users. They have hundreds if not thousands of emails and bug reports to prioritize and sift through that were submitted through the proper channels. Keeping that in mind, please seek out the right place to file a bug report for your kernel and specific hardware so that the issue can be addressed properly. To avoid hijacking threads, I would also recommend that you start your own thread next time as your issue has nothing to do with the OP's issue.

Please accept my apology, even if it is off topic.

[rab0171610]

Please accept my apology, even if it is off topic.

Apologies not necessary!!! I just want to make sure you get the best use of the forum. Start a thread about your issue and your specific driver involved and see what responses you get. You might get your issue solved. Also, if you don't get a resolution that works, please file a bug report so that they can be made aware of the situation upstream. In an ideal world, devs would see everything we post here and take heart, but it just isn't so. Make sure to put "bcm43142" in your title.

[devnulljp]

Yes to dkms, *but* looks like it's fixed as of 5.17.11 (and I notice they don't have the separate wifi module any more).

[rab0171610]

looks like it's fixed as of 5.17.11 (and I notice they don't have the separate wifi module any more)

Awesome!!!