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2010-04-25 - No sound after upgrading to Ubuntu 9.10 (Karmic Koala)
This affected my EEE 901. The symptoms were:
- No sound output on the laptop's built-in device (snd-hda-intel)
- When I plugged in a USB sound device (snd-usb-audio), it also didn't produce any sound
- Pulseaudio showed only a "dummy" output device. No hardware devices shown
- "cat /proc/asound/cards" showed the sound cards were recognised by the kernel
The problem turned out to be with my $HOME/.asoundrc and $HOME/.asoundrc.asoundconf files.
I found this:
- "alsamixer" failed to run, complaining of problems with the above files
Solution:
- I removed .asoundrc and .asoundrc.asoundconf
- I killed and restarted pulseaudio
- pulseaudio -k
- pulseaudio --start
Then sound worked. I assume that pulseaudio couldn't get the ALSA device information due
to the problems with the config file(s). It was probably only .asoundrc.asoundconf with
a problem but I had nothing special in the other file so I removed that too.