Hey all,

I have this problem as well. I'm running Ubuntu Feisty.

When it's not working the way I want, you don't hear system sounds, sound 
comming from my regular music player XMMS nor is there sound in flash. I do 
have sound in Rhytmbox though.
It works on random, rebooting or a cold start appear to have the same chance of 
working.

When the sound is working the way it should and I call alsamix in the command 
line, I get the right sound card: C-Media PCI CMI8738-MC6
calling alsamix -c 1 shows the other card: SiS SI7012. (the latter btw is a 
device on my mainboard, the first (right) one is a PCI card I installed).

When the sound is not working correctly, the results are switched:
alsamix shows the card on the mainboard and alsamix -c 1 the PCI card.

I did some testing, cold starting and rebooting Ubuntu, booting Windows
XP in between a couple of times. I can't find a pattern in it though:
whether the sound works or not appears to be random.

I'll post the outputs of dmsg in both situation too, I hope they'll be
usefull.

Thanx and good luck!


** Attachment added: "The dmsg output when it works correctly."
   http://librarian.launchpad.net/7504451/fine.txt

-- 
Sound doesn't work after restart, only works on cold boot
https://bugs.launchpad.net/bugs/57141
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