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userlander

Member

Registered: 2008-08-23

Posts: 413

[SOLVED] Lost Sound After Upgrade

Solved (for now at least). The problem appears to be a bug with alsa. Alsaconf writes a file called /etc/modprobe.d/50-sound.conf, which contains the aliases for the sound card. But for some reason it then wasn't reading the file. Copying the alias entries to /etc/modprobe.d/modprobe.conf to read directly from there seems to have worked.

Now to fix the frequency scaling.

===================== solved ===========================

I lost all sound after the last upgrade. I just rebooted because frequency scaling is also not working, and no sound.

all drivers seem to be there:

08:50 AM:~ $ lsmod |grep snd
snd_mpu401_uart         9264  0 
snd_hda_codec_realtek   278132  1 
snd_cs46xx             96800  1 
snd_seq_dummy           3540  0 
gameport               13760  2 snd_cs46xx
snd_hda_intel          31208  3 
snd_hda_codec          82128  2 snd_hda_codec_realtek,snd_hda_intel
snd_hwdep               9976  1 snd_hda_codec
snd_rawmidi            26592  2 snd_mpu401_uart,snd_cs46xx
snd_ac97_codec        133560  1 snd_cs46xx
snd_seq_oss            36224  0 
snd_seq_midi_event      8592  1 snd_seq_oss
snd_seq                64640  5 snd_seq_dummy,snd_seq_oss,snd_seq_midi_event
snd_seq_device          8324  4 snd_seq_dummy,snd_rawmidi,snd_seq_oss,snd_seq
snd_pcm_oss            47328  0 
snd_pcm                90872  5 snd_cs46xx,snd_hda_intel,snd_hda_codec,snd_ac97_codec,snd_pcm_oss
snd_timer              25344  2 snd_seq,snd_pcm
snd_page_alloc         10784  3 snd_cs46xx,snd_hda_intel,snd_pcm
snd_mixer_oss          20976  2 snd_pcm_oss
snd                    76744  21 snd_mpu401_uart,snd_hda_codec_realtek,snd_cs46xx,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_rawmidi,snd_ac97_codec,snd_seq_oss,snd_seq,snd_seq_device,snd_pcm_oss,snd_pcm,snd_timer,snd_mixer_oss
soundcore               8576  2 snd
ac97_bus                2160  1 snd_ac97_codec

I don't see anything in the updated packages that might cause this:

[2009-08-09 18:09] upgraded gawk (3.1.6-3 -> 3.1.7-1)
[2009-08-09 18:09] upgraded gimp (2.6.6-2 -> 2.6.6-3)
[2009-08-09 18:09] upgraded imagemagick (6.5.4.5-1 -> 6.5.4.8-1)
[2009-08-09 18:09] upgraded kdelibs3 (3.5.10-5 -> 3.5.10-7)
[2009-08-09 18:09] upgraded mkinitcpio (0.5.25-1 -> 0.5.26-1)
[2009-08-09 18:09] upgraded polkit-qt (0.9.2-1 -> 0.9.2-2)
[2009-08-09 18:09] upgraded psmisc (22.7-1 -> 22.8-1)
[2009-08-09 18:09] upgraded python-pygame (1.9.0-1 -> 1.9.1-1)
[2009-08-09 18:09] upgraded python-pysqlite (2.4.1-2 -> 2.5.5-1)
[2009-08-09 18:09] upgraded readline (6.0.003-3 -> 6.0.004-1)
[2009-08-09 18:09] Fixing gshadow file ...
[2009-08-09 18:09] upgraded shadow (4.1.4.1-1 -> 4.1.4.2-1)

I tried firefox, xine, mythfrontend, avidemux2, xmms and mpg123 - there's no sound in any app. If I play something where there are indicators, like in xmms, the eq indicator levels jump, the song progresses like it's playing, but no sound. I reran alsaconf, it seems to be configured properly. The mixer sliders work and aren't muted. It doesn't work either as root or as user.

I have another computer hooked up through the line out and the sound still works fine there, so it doesn't appear to be a hardware problem.

I'm completely stumped at this point. If it's a bug somewhere, what's it a bug in to cause global sound loss? Is there anything else I'm overlooking? All I can think is that it must be muted somewhere, but I can't find it. Or else it has something to do with the cpu and cpu freq scaling that's also broken now.

===================== solved ===========================

Last edited by userlander (2009-08-10 15:04:45)