Red Hat Bugzilla – Bug 432859
snd_hda_intel fails after suspend/resume
Last modified: 2008-11-26 14:35:10 EST
Description of problem:
When I suspend my Thinkpad T61 laptop to disk, and then resume it, sometimes the
snd_hda_intel driver becomes wedged in some way. I need to rmmod/modprobe the
snd_hda_intel module to get sound working again.
Version-Release number of selected component (if applicable):
Not always, but probably 80% of the time.
Steps to Reproduce:
1. Have a computer which uses snd_hda_intel for sound.
2. Suspend it to disk (haven't experimented with suspend to RAM) and resume it.
3. Try 'paplay /path/to/a.wav'
Actual results: No sound.
Expected results: Sound.
The output of the PulseAudio daemon at times like this looks like:
ALSA lib confmisc.c:768:(parse_card) cannot find card '0'
ALSA lib conf.c:3510:(_snd_config_evaluate) function snd_func_card_driver
returned error: No such device
ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings
ALSA lib conf.c:3510:(_snd_config_evaluate) function snd_func_concat returned
error: No such device
ALSA lib confmisc.c:1251:(snd_func_refer) error evaluating name
ALSA lib conf.c:3510:(_snd_config_evaluate) function snd_func_refer returned
error: No such device
ALSA lib conf.c:3982:(snd_config_expand) Evaluate error: No such device
ALSA lib pcm.c:2145:(snd_pcm_open_noupdate) Unknown PCM front:0
E: module-alsa-sink.c: Error opening PCM device front:0: No such device
When the sound device dies, it causes problems for the PulseAudio daemon, but
the underlying problem seems to be snd_hda_intel. This seems to be conventional
wisdom among some people at least (cf the linked Novell bug report).
Actually, Novell 2813045 is a better bug report reference. The OpenSUSE team
marked this particular bug as a WONTFIX, pending on the reporter trying things
on a post-2.6.22 kernel, but I'm using 126.96.36.199 and have the same issue.
I have a similar problem. However this time it's 188.8.131.52-18.fc9.x86_64.
reloading snd_hda_intel fixes the problem. Also in my case, it happens all the
time so I can supply necessary debugging info. On resume, everything related
with sound seems working (ie. rhythmbox keeps progressing etc.) but no sound
comes from the speakers and a buzz sound comes same sound comes when my computer
is powered off.
I used to see this problem too with this machine when it was running F8 and F9.
I have since upgraded to rawhide and with it's current
kernel-2.6.27-0.180.rc0.git11.fc10.i686 the problem is gone.
(Note: I am not suggesting that you should upgrade your production machines to
rawhide! Just that the bug will probably be gone as soon as F10 is released)
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On the latest Fedora 9 kernel, I think I may occasionally see this problem, but most of the time the sound works. I'll assume this bug is fixed.