no sound after upgrade to Feisty

Please mute 'External Amplifier'.

Muted External Amplifer via KMix (i.e. turned the little yellow light off), no change.

Rebooted, no change.

Checked that External Amplifier was muted on both KMix and ALSA Mixer (alsamixergui), no change.

Is sound audible after executing ``sudo /etc/init.d/alsa-utils reset'' ?

executed reset, no change; rebooted and re-executed reset, no change.

is it possible that a hardware problem coincided with the upgrade?

It's possible but statistically improbable (particularly for most IBM hardware).

Please attempt the following sequential commands in a Terminal:

kill $(lsof -t /dev/dsp* /dev/audio* /dev/mixer* /dev/snd/*)
sudo modprobe -r $(lsof |grep ^snd |awk '{print $1}'
sudo rm -f /var/lib/alsa/asound.state
sudo modprobe snd-intel8x0

After executing the above four commands, please adjust the mixer controls as necessary, and attempt to play an audio file.

Sorry, there's a missing ')' in the second command above. It should instead read:

sudo modprobe -r $(lsof |grep ^snd |awk '{print $1}')

unfortunately, no change.

Please attach the output from ``amixer'' in a Konsole.

Are you using ``aplay /usr/share/sounds/*up.wav'' to test whether audio is audible? If not, please use this method, and attach any output in the Konsole that is displayed as a result of executing that aplay command.

Well... last night I was running my battery down, and when the computer beeped to give me the low-battery warning, sound came back for the 1/2 second it took to play the beep.

Shut down, restarted this morning, we've got sound again.

Thank you for working on this during finals week, by the way.

Well... last night I was running my battery down, and when the computer beeped to give me the low-battery warning, sound came back for the 1/2 second it took to play the beep.

Shut down, restarted this morning, we've got sound again.

Thank you for working on this during finals week, by the way.

...and after coming out of hibernation, sound is gone again.

Attached is output of amixer after coming out of hibernation.

That's bug 80893.

Feisty is now out of support, sound has improved considerably in the later releases and we would recommend the new 9.04 (Jaunty Jackalope) release. If this issue appears in a currently supported release please reopen this bug by moving this task to New.