[LAU] lost sound (it had been working)

[Nigel Henry]

On Monday 19 January 2009 16:51, Reid Vail wrote:
> Hello Group -
>
> I'm really confused about what's gone wrong with my sound.  Total
> Silence even though it was working less than two weeks ago after an
> upgrade to 8.10.  User error?, or a bad patch maybe...can you help?
>
> I'm running ubuntu 8.10 on a 64-bit machine
>
> _______________________________________________________________________
>
> I have done some research and have been following the steps I found at
> this posting:
>
> http://ubuntuforums.org/showthread.php?t=205449&highlight=comprehensive+sou
>nd
>
> First step is this:
> results appear normal.
>
> reid at linux-rv:~$ aplay -l
> **** List of PLAYBACK Hardware Devices ****
> card 0: V8237 [VIA 8237], device 0: VIA 8237 [VIA 8237]
>   Subdevices: 4/4
>   Subdevice #0: subdevice #0
>   Subdevice #1: subdevice #1
>   Subdevice #2: subdevice #2
>   Subdevice #3: subdevice #3
> card 0: V8237 [VIA 8237], device 1: VIA 8237 [VIA 8237]
>   Subdevices: 1/1
>   Subdevice #0: subdevice #0
> reid at linux-rv:~$
>
> ___________________________________________________________________________
>__
>
> Second step:
> reid at linux-rv:~$ lspci -v
>
>
> 00:11.5 Multimedia audio controller: VIA Technologies, Inc.
> VT8233/A/8235/8237 AC97 Audio Controller (rev 60)
>     Subsystem: ASUSTeK Computer Inc. Device 80b0
>     Flags: medium devsel, IRQ 22
>     I/O ports at c800 [size=256]
>     Capabilities: <access denied>
>     Kernel driver in use: VIA 82xx Audio
>     Kernel modules: snd-via82xx
>
> Looks Ok, I think
>
> ______________________________________________________________________
>
> Third step:
>
>
> reid at linux-rv:~$ sudo modprobe snd-via-82xx
> [sudo] password for reid:
> FATAL: Module snd_via_82xx not found.
> reid at linux-rv:~$
>
> That's not good, or expected.
>
> Fourth step (sorry about the screwy formatting):
>
>
>
> reid at linux-rv:~$  lsmod|grep snd
> snd_via82xx            36904  3
> snd_via82xx_modem      21900  0
> gameport               21776  1 snd_via82xx
> snd_seq_dummy          11524  0
> snd_ac97_codec        133080  2 snd_via82xx,snd_via82xx_modem
> ac97_bus               10368  1 snd_ac97_codec
> snd_pcm_oss            52608  0
> snd_mixer_oss          25088  1 snd_pcm_oss
> snd_pcm                99208  4
> snd_via82xx,snd_via82xx_modem,snd_ac97_codec,snd_pcm_oss
> snd_seq_oss            42368  0
> snd_mpu401_uart        16768  1 snd_via82xx
> snd_seq_midi           15872  0
> snd_rawmidi            34176  2 snd_mpu401_uart,snd_seq_midi
> snd_seq_midi_event     16768  2 snd_seq_oss,snd_seq_midi
> snd_seq                67168  6
> snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_seq_midi_event
> snd_timer              34320  2 snd_pcm,snd_seq
> snd_seq_device         16404  5
> snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_rawmidi,snd_seq
> snd                    79432  18
> snd_via82xx,snd_via82xx_modem,snd_ac97_codec,snd_pcm_oss,snd_mixer_oss,snd_
>pcm,snd_seq_oss,snd_mpu401_uart,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
> snd_page_alloc         17680  3 snd_via82xx,snd_via82xx_modem,snd_pcm
> soundcore              16800  1 snd
>
> So...I'm not sure what to look for here....
>
> Any thoughts would be appreciated.
>
> Reid

Hi Reid.

The first thing I'd check out is alsamixer, as all the modules appear to be 
loaded. There is a typo on your 3rd step. Module should be snd-via82xx, not 
snd-via-82xx. That aside, open alsamixer as user, as below, and check for 
sliders that may be down at zero, or may be muted since the updates. Typical 
controls are, Master, PCM, Front, CD. "M" key toggles the mute/unmute.

alsamixer -D hw:0

All the best.

Nigel.