Hello,
I have a Toshiba Satellite C655D with Mageia 2 and I have a problem where the internal speakers eventually stop producing sound, but the headphones still work. After doing a bit of research and running alsa-info (attached) I figured out that one of the parts of the sound card had gone into a D3 power state.
Removing and then reloading the snd_hda_intel module fixed the problem, but then the sound would turn off again. I was able to find a post in alsa-users where someone else came up with a better solution using hda-verb to reset the power state: http://www.mail-archive.com/alsa-user@lists.sourceforge.net/msg28769.html
I also found a thread in the gentoo forums where other people are having the same problem. One of them has kernel 3.5.0: http://forums.gentoo.org/viewtopic-t-932038.html?sid=2bee6543c63f2342057c71b...
I'm open to compiling my own alsa and helping out in any way I can. Please let me know what I can do.
Mageia bug report for completeness: https://bugs.mageia.org/show_bug.cgi?id=7292
Thank you,
Jeff