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): kernel-2.6.23.15-137.fc8 How reproducible: 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. Additional info: 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 2.6.23.15 and have the same issue.
I have a similar problem. However this time it's 2.6.25.3-18.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.