ath11k_pci sometimes crashes on suspend/resume on Dell XPS 13 9310

[Matt Austin]

Sometimes when my Dell XPS 13 9310 resumes from suspend, the display fails to show anything for a short while. When the display does show, the wireless network is no longer working.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-modules-5.10.0-1045-oem 5.10.0-1045.47
ProcVersionSignature: Ubuntu 5.10.0-1045.47-oem 5.10.46
Uname: Linux 5.10.0-1045-oem x86_64
ApportVersion: 2.20.11-0ubuntu27.20
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: GNOME
Date: Sat Sep 18 12:04:49 2021
Dependencies:

InstallationDate: Installed on 2021-09-13 (4 days ago)
InstallationMedia: Ubuntu 20.04.3 LTS "Focal Fossa" - Release amd64 (20210819)
SourcePackage: linux-oem-5.10
UpgradeStatus: No upgrade log present (probably fresh install)

[Matt Austin (mattaustin)]

Adding log snippet form kernel.log - where the following is repeated:

Sep 18 11:46:57 perseverance kernel: [314619.796128] ath11k_pci 0000:72:00.0: wmi command 16387 timeout
Sep 18 11:46:57 perseverance kernel: [314619.796134] ath11k_pci 0000:72:00.0: failed to send WMI_PDEV_SET_PARAM cmd
Sep 18 11:46:57 perseverance kernel: [314619.796139] ath11k_pci 0000:72:00.0: failed to enable PMF QOS: (-11

[Matt Austin (mattaustin)]

I should also note that after this happens, attempting to "rmmod ath11k_pci" results in a wait of several minutes before then getting a segmentation fault error.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Nigini (nigini)]

It seems there is a patch for the 5.13 kernel: https://bugzilla.kernel.org/show_bug.cgi?id=215103

This is a very annoying bug that makes one re-start the machine every couple of days because, as Matt said above, you cannot manually restart the module.

[Matt Austin (mattaustin)]

It appears installing linux-oem-20.04c resolves this issue for me (it installs kernel 5.13).

[Nigini (nigini)]

Matt, double-thank you for pointing out the OEM kernel versioning system I had no idea existed. Plus, I have been testing the C kernel for two weeks now and had no issues with the WIFI waking up.

(I had, though, an issue with the Bluetooth not reconnecting my devices correctly a couple of times -- a different issue that may be related to the current patch(?) -- but it can be solved with turning BT off and on again.)