Hi,
On my System76 Gazelle Pro (gazp9) laptop, internal audio broke after
upgrading to kernel 5.10.
The laptop's speakers produce no sound. Audio from headphones still
works fine. A quick test is to visit GNOME System Settings -> Sound ->
Output, select Test, click Front Left or Front Right and notice there
is no sound. I tested a mainline kernel revision from yesterday
(5.11-rc5+) and the regression is not yet fixed. I bisected the
regression to "ALSA: HDA: Early Forbid of runtime PM":
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a0645daf16101bb9a6d87598c17e9a8b7bd60ea7
I created a downstream bug report here, including some bits from dmesg
that may or may not be relevant in comment #2:
https://bugzilla.redhat.com/show_bug.cgi?id=1918933
Audio devices:
$ lspci | grep -i audio
00:03.0 Audio device: Intel Corporation Xeon E3-1200 v3/4th Gen Core
Processor HD Audio Controller (rev 06)
00:1b.0 Audio device: Intel Corporation 8 Series/C220 Series Chipset
High Definition Audio Controller (rev 05)
OS: Fedora 33
I'm happy to provide any additional required info or test patches if
you CC me, since I'm not a kernel developer and am not subscribed to
these lists. Thanks.
