No Sound since latest updates.

[Roger Benham]

Thanks for your help. Here is what I got: 


As an update to all this:
Using a Zen live CD I found that my sound
worked fine. I now have inserted my Ubuntu 8.10 .iso CD and installed
it as a live CD (I know it was as the desktop reverted to the
installation desktop). Again the sound works fine. I'm now back on my
updated 8.10 and once again I have no sound.
Obviously an update has knocked it out. Thanks a lot Ubuntu.
Hi Roger.

I usually go for pulseaudio as the usual suspect, but it appears to be 
behaving itself on my Ubuntu Intrepid 8.10 install, on a machine using hda 
intel soundcard.

Have a go at opening alsamixer on Gnomes terminal, as user, as below. there 
was a problem where the PCM control was either being muted, or set back to 
zero when rebooting. I believe that was fixed with a kernel update, but you 
never know.

alsamixer -D hw:0

AlsaMixer v1.0.17 (Press Escape to quit)]──────────────────┐
│ Card: NVidia CK804                                                           │
│ Chip: Realtek ALC850 rev 0                                                   │
│ View: [Playback] Capture  All                                                │
│ Item: Master [dB gain=-3.00, -3.00]                                          │
│                                                                              │
│    ┌──┐     ┌──┐      ┌──┐     ┌──┐               ┌──┐     ┌──┐     ┌──┐     │
│    │▒▒│     │  │      │  │     │  │               │▒▒│     │  │     │  │     │
│    │▒▒│     │  │      │  │     │  │               │▒▒│     │  │     │▒▒│     │
│    │▒▒│     │▒▒│      │▒▒│     │  │               │▒▒│     │  │     │▒▒│     >
│    │▒▒│     │▒▒│      │▒▒│     │  │               │▒▒│     │  │     │▒▒│     >
│    │▒▒│     │▒▒│      │▒▒│     │  │               │▒▒│     │  │     │▒▒│     >
│    │▒▒│     │▒▒│      │▒▒│     │  │               │▒▒│     │  │     │▒▒│     >
│    │▒▒│     │▒▒│      │▒▒│     │  │               │▒▒│     │  │     │▒▒│     >
│    │▒▒│     │▒▒│      │▒▒│     │  │               │▒▒│     │  │     │▒▒│     >
│    │▒▒│     │▒▒│      │▒▒│     │  │               │▒▒│     │  │     │▒▒│     │
│    │▒▒│     │▒▒│      │▒▒│     │  │               │▒▒│     │  │     │▒▒│     │
│    │▒▒│     │▒▒│      │▒▒│     │  │    Shared     │▒▒│     │  │     │▒▒│     │
│    ├──┤     ├──┤      ├──┤     ├──┤               ├──┤     ├──┤     ├──┤     │
│    │OO│     │OO│      │OO│     │MM│               │MM│     │MM│     │OO│     │
│    └──┘     └──┘      └──┘     └──┘               └──┘     └──┘     └──┘     │
│   94<>94     81      81<>81    0<>0                100       0     84<>84    │
│ < Master >Master M    PCM    Surround Surround   Center    LFE      Line     

Perhaps you'd also post the output from the following commands.

cat /proc/asound/cards
grep ^Codec /proc/asound/card?/codec*
lsmod | grep snd

Don't give up. Most sound problems are resolvable.

Nigel.


roger at roger-desktop:~$ cat /proc/asound/cards
 0 [CK804          ]: NFORCE - NVidia CK804
                      NVidia CK804 with ALC850 at irq 22
roger at roger-desktop:~$ grep ^Codec /proc/asound/card?/codec*
roger at roger-desktop:~$ lsmod | grep snd
snd_intel8x0           37532  4 
snd_ac97_codec        111652  1 snd_intel8x0
ac97_bus                9856  1 snd_ac97_codec
snd_pcm_oss            46848  0 
snd_mixer_oss          22784  1 snd_pcm_oss
snd_pcm                83204  4 snd_intel8x0,snd_ac97_codec,snd_pcm_oss
snd_seq_dummy          10884  0 
snd_seq_oss            38528  0 
snd_seq_midi           14336  0 
snd_rawmidi            29824  1 snd_seq_midi
snd_seq_midi_event     15232  2 snd_seq_oss,snd_seq_midi
snd_seq                57776  7 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_seq_midi_event
snd_timer              29960  2 snd_pcm,snd_seq
snd_seq_device         15116  5 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_rawmidi,snd_seq
snd                    63268  18 snd_intel8x0,snd_ac97_codec,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_seq_oss,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
soundcore              15328  1 snd
snd_page_alloc         16136  2 snd_intel8x0,snd_pcm






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