I just tried patching and building alsa as specified here:
https://bugs.launchpad.net/ubuntu/+source/linux-
source-2.6.22/+bug/116326/comments/75

No joy with either internal speakers or headphones. I can change volume
as before, and this apparently works. Everything appears to see the
card, and attempts to play normally. I just don't get any sound. Note
that under windows (Vista) the mixer arrangement for this machine is a
bit complicated, with separate controls for the front panel and main
speakers. I only see two volume settings under Ubuntu: Master and PCM.

I should also mention that whenever I rmmod and then modprobe snd_hda_intel 
from the command-line, I get this sort of thing:
[   23.984000] si3054: cannot initialize. EXT MID = 0000
This message also appears in the boot-up dmesg output.

My laptop is nearly identical to matheuu's.

-- 
Feisty Sound not working at all on a toshiba a200 satellite has intel HDA
https://bugs.launchpad.net/bugs/120302
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