[alsa-devel] kernel oops related to the new HDA audio handling for DP MST

[Takashi Iwai]

On Wed, 27 Nov 2019 15:26:37 +0100,
Michał Matysiak wrote:
> 
> Hi
> 
> Recently I've encountered this error and as Hans de Goede's request I'm
> reporting this back to you. This happens while booting my laptop
> connected to docking station and without using one.
> 
> kernel: WARNING: CPU: 1 PID: 330 at sound/hda/hdac_component.c:290 snd_hdac_acomp_init+0xde/0x130 [snd_hda_core]
> There are 2 more "cut here", but they're almost identical so I've only
> included one in this email.
> 
> Don't know what will be valuable to you, but I'm willing to help test
> this and do what I'm told. So, how can I help?
> 
> More info about this particular kernel and issue, that led to this is at:
> https://bugzilla.redhat.com/show_bug.cgi?id=1757891
> 
> dmesg output:
> 
> Nov 26 18:05:45 kernel: microcode: microcode updated early to revision 0x2f, date = 2019-02-17
> Nov 26 18:05:45 kernel: Linux version 5.4.0-0.rc8.git0.1.rhbz1757891.fc31.x86_64 (mockbuild at buildhw-10.phx2.fedoraproject.org) (gcc version 9.2.1 20190827 (Red Hat 9.2.1-1) (GCC)) #1 SMP Wed Nov 20 14:50:34 UTC 2019
> Nov 26 18:05:45 kernel: Command line: BOOT_IMAGE=(hd0,gpt2)/vmlinuz-5.4.0-0.rc8.git0.1.rhbz1757891.fc31.x86_64 root=/dev/mapper/fedora-root ro resume=/dev/mapper/fedora-swap rd.lvm.lv=fedora/root rd.luks.uuid=luks-efd8b438-8f56-405a-8cea-88f83ca38d2b rd.lvm.lv=fedora/swap rhgb quiet
> ...
> ...
> ...
> Nov 26 18:06:16 kernel: ------------[ cut here ]------------
> Nov 26 18:06:16 kernel: WARNING: CPU: 0 PID: 461 at sound/hda/hdac_component.c:290 snd_hdac_acomp_init+0xde/0x130 [snd_hda_core]

This should have been already fixed by the recent commit
5a858e79c911330678b5a9be91a24830e94a0dc9
    ALSA: hda - Disable audio component for legacy Nvidia HDMI codecs
which is already included in Linus tree.  Please check it.


thanks,

Takashi