Bug#1027483: linux-image-5.10.0-20-amd64: sound with firmware-sof-intel on Intel Lake stops working with newer kernel

[Malvin Gattinger <malvin@w4eg.eu>]

Package: linux-image-5.10.0-20-amd64
Version: 5.10.158-2
Severity: normal
X-Debbugs-Cc: malvin@w4eg.eu

Dear Maintainer,

I am unsure if this problem belongs to linux-image-amd64 as a regression or is actually a but in firmware-sof-intel.

On an HP ProBook with this sound card (from lspci):

00:1f.3 Multimedia audio controller: Intel Corporation Tiger Lake-LP Smart Sound Technology Audio Controller (rev 20)

Updating from linux-image-5.10.0-19-amd64 to linux-image-5.10.0-20-amd64 breaks sound.

Sound output from VLC works fine immediately after boot, but using the microphone or other audio use cases later disables all output. Unfortunately the only reproducible example on this laptop was to open the proprietary zoom video-conferencing software which immediately stops all output, but other symptoms are discussed here:

https://forums.debian.net/viewtopic.php?t=153585

https://forums.debian.net/viewtopic.php?p=764594

PulseAudio claims that the output is still running, i.e. pavucontrol and KDE audio settings still show a moving bar for the output.

The only workaround for now is to use the older kernel from linux-image-5.10.0-19-amd64.

kind regards and happy new year,
Malvin Gattinger



-- System Information:
Debian Release: 11.6
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 5.10.0-19-amd64 (SMP w/8 CPU threads)
Kernel taint flags: TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages linux-image-5.10.0-20-amd64 depends on:
ii  initramfs-tools [linux-initramfs-tool]  0.140
ii  kmod                                    28-1
ii  linux-base                              4.6

Versions of packages linux-image-5.10.0-20-amd64 recommends:
ii  apparmor             2.13.6-10
ii  firmware-linux-free  20200122-1

Versions of packages linux-image-5.10.0-20-amd64 suggests:
pn  debian-kernel-handbook  <none>
ii  grub-efi-amd64          2.06-3~deb11u5
pn  linux-doc-5.10          <none>