No Sound since latest updates.

[Nigel Henry]

On Sunday 18 January 2009 23:21, Roger Benham wrote:
> 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,s
>nd_rawmidi,snd_seq,snd_timer,snd_seq_device soundcore              15328  1
> snd
> snd_page_alloc         16136  2 snd_intel8x0,snd_pcm
>


Hi Roger.

I don't see any problems with the output you've posted above, and sound should 
be working.

Try running speaker-test as user, and post the output.

Also run the following commands to see what may be grabbing the soundcard, and 
preventing you hearing sounds. I ask because of this line from your lsmod 
output.
snd_intel8x0           37532  4  (the 4 may be a problem)

lsof -n | grep /dev/dsp
lsof | grep /dev/snd

All the best.

Nigel.