no sound cards found afer kernel update from 6.2.0-26 to 6.2.0-32

[Lars W]

After the update from kernel 6.2.0-26 to 6.2.0-32 under Ubuntu 22.04 LTS, there are no more sound cards found. I can reliably reproduce this by switching in the grub boot menu between the kernel versions.

I used sound over HDMI of the NVIDIA Corporation GP108 [GeForce GT 1030] and it used to use the module snd_hda_intel. Now, a symptom is that `aplay -l` reports "no soundcards found", and neither does any other program.

I had similar problems after the Ubuntu update from 5.19.0-43 to 5.19.0-45.

I reported this to the offical linux kernel mailinglist yesterday ( https://bugzilla.kernel.org/show_bug.cgi?id=217917 ). They have sent me here. Indeed, I now tried the vanilla "mainline" kernels 6.2.0-rc8 and 6.5.3 - and there the sound cards are correctly found.

I am attaching logfiles and info from /proc for the different tried kernel version that are hopefully useful. Please let me know if there is more info I can provide or things I could try to narrow down the problem.

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: linux-image-6.2.0-32-generic (not installed)
ProcVersionSignature: Ubuntu 6.2.0-26.26~22.04.1-generic 6.2.13
Uname: Linux 6.2.0-26-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu82.5
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: KDE
Date: Sun Sep 17 09:52:19 2023
InstallationDate: Installed on 2023-04-16 (153 days ago)
InstallationMedia: Kubuntu 22.04.2 LTS "Jammy Jellyfish" - Release amd64 (20230223)
SourcePackage: linux-signed-hwe-6.2
UpgradeStatus: No upgrade log present (probably fresh install)

[Juerg Haefliger (juergh)]

Hm. Is this the only thing that's not working after the upgrade? What about bluetooth and wifi?

[Lars W (lavs)]

It resolved itself. Sorry to bother you.

I listed all installed Linux kernel packages (dpkg -l | grep "linux\-[a-z]*\-") and kept only the 6.2.0-26 versions. Then I removed unused packages (sudo apt autoremove) and afterwards reinstalled 6.2.0-32 (sudo apt install linux-image-6.2.0-32-generic linux-modules-6.2.0-32-generic linux-modules-extra-6.2.0-32-generic linux-modules-nvidia-525-6.2.0-32-generic linux-objects-nvidia-525-6.2.0-32-generic linux-signatures-nvidia-6.2.0-32-generic). Now sounds works again! (I don't know if WiFi was affected, but it works now.)

For reference, I attach the dmesg logs without timestamps (sed 's/^\[ *[0-9]*\.[0-9]*\] //') from the original problematic 6.2.0-32 kernel and again after reinstall. The first substantial difference I could spot is after "PM: Magic number" it no longer says "acpi AMDI0020:02: hash matches".