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I've followed this :

Howto - Resolve no sound problem on Ubuntu 12.10, 12.04 and Older

In addition, I've disabled auto-mute in alsamixer. If I play a sound under VLC, I can see in pavu, that there's something playing - that the volume is registered - yet I hear nothing.

I recall my sound working prior to about a week ago, but it seems to have abruptly stopped on its own.

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closed as off topic by Jorge Castro, qbi, gertvdijk, Eric Carvalho, Tom Brossman Jan 15 '13 at 21:35

Questions on Ask Ubuntu are expected to relate to Ubuntu within the scope defined by the community. Consider editing the question or leaving comments for improvement if you believe the question can be reworded to fit within the scope. Read more about reopening questions here.If this question can be reworded to fit the rules in the help center, please edit the question.

After doing a lot of experimenting today, I think this is related to the latest kernels, as on -18 and had no nvidia driver but had sound. As soon as I manually installed the headers and manually installed nvidia-current, I now have no sound. Any ideas on how to restore? – steorra Nov 19 '12 at 3:41
You can try removing NVidia drivers and re-checking the results. – VedVals Nov 19 '12 at 7:55
I've done that, and have sound then. Coincidentally, I also loaded Linux Mint 14 RC and had the same experience out of the box. – steorra Nov 21 '12 at 1:40
Update : Now I lost my sound! Fiddled with alsamixer as per link. Now only one earphone slot works. No sound from speakers. – VedVals Nov 21 '12 at 7:13

Reloading the sound driver has a very good chance of solving your problem:

sudo /sbin/alsa force-reload
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