wifi stopped working on killer ax500 xps 9500 with kernel upgrade to 5.11.0-40

[Laurenz]

Hi all,

after upgrading my kernel to 5.11.0-40 my wifi card (AX500 killer wifi) is no longer recognized on my xps 15 9500. When I boot into the old kernel, 5.11.0-38 it is still working.
I found that this issue has been reported here:

https://bugzilla.kernel.org/show_bug.cgi?id=214455

and it could be traced back to commit:

3f38cc1ba1e289306f52cb7238406f38ecbfa21a net: qrtr: make checks in qrtr_endpoint_post() stricter

which was also in the patchset:

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1946788

for the 5.11.0-40 release. in the bugzilla link a solution was mentioned and it generally doesn't seem too big a problem, would be awesome if someone could look into this.

Thanks a lot!
---
ProblemType: Bug
ApportVersion: 2.20.11-0ubuntu27.21
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: laurenz 2209 F.... pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: GNOME
DistroRelease: Ubuntu 20.04
InstallationDate: Installed on 2021-04-16 (207 days ago)
InstallationMedia: Ubuntu 20.04.2.0 LTS "Focal Fossa" - Release amd64 (20210209.1)
MachineType: Dell Inc. XPS 15 9500
NonfreeKernelModules: nvidia_modeset nvidia
Package: linux (not installed)
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.11.0-38-generic root=UUID=3c4f468c-c47a-4a25-b8f2-20610c9437b2 ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 5.11.0-38.42~20.04.1-generic 5.11.22
RelatedPackageVersions:
 linux-restricted-modules-5.11.0-38-generic N/A
 linux-backports-modules-5.11.0-38-generic N/A
 linux-firmware 1.187.20
Tags: focal
Uname: Linux 5.11.0-38-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 08/11/2021
dmi.bios.release: 1.9
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.9.1
dmi.board.name: 0XWT2F
dmi.board.vendor: Dell Inc.
dmi.board.version: A02
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvr1.9.1:bd08/11/2021:br1.9:svnDellInc.:pnXPS159500:pvr:sku097D:rvnDellInc.:rn0XWT2F:rvrA02:cvnDellInc.:ct10:cvr:
dmi.product.family: XPS
dmi.product.name: XPS 15 9500
dmi.product.sku: 097D
dmi.sys.vendor: Dell Inc.

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1950448

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Laurenz (laurenz0908)]

I do not have access to internet when the mentioned kernel version is used. Therefore changed to "confirmed" without running the command apport-collect as requested by Kernel Bot.
Also all required information shoud be in the bugzilla link.

[Chris Guiver (guiverc)]

Thanks for your last comment.

It would be more useful if you ran the `apport-collect` using the last good kernel (5.11.0-38 you mention) that worked; instead of not running apport-collect.

You can just note it was run using a different kernel due to this issue. Currently no architecture, release details, etc have been provided, ie. details usually collected by apport-collect. As a result the issue risks being missed due to missing details.

Thank you especially for providing the link to commit & reason for the issue. That is appreciated.

[Laurenz (laurenz0908)]

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[Laurenz (laurenz0908)]

Thanks Chris, as requested I ran apport-collect it with the last working kernel.

[Barry WIlks (forge7)]

The bug referred to above (https://bugzilla.kernel.org/show_bug.cgi?id=214455) is marked as RESOLVED CODE_FIX. When should we expect to be getting this in Ubuntu?

[Laurenz (laurenz0908)]

Works with upgrade to 5.11.0-41 .