[alsa-devel] Problem and workaround for Intel HDA

[Takashi Iwai]

At Thu, 19 Jul 2007 18:58:42 +0200,
Yann Le Brech wrote:
> 
> The problem : missing controls of the sound cards for an Intel HDA,
> Toshiba Satellite Pro U200
> 
> Full description :
> I was using the kernel 2.6.19 for a while, and I got some interesting
> functions like controlling the sound level on headphones or speakers
> separately. Then I upgraded to the kernel 2.6.21.1 and suddently the
> level controls changed, to useless level controls, like Master and PCM
> only (and some other useless). I wanted to get back to the previous
> control set, and I've found a solution by checking what was done in
> debugging mode. The previous kernel was not detecting the model
> config, but the new one did. So I simply strapped the detection
> routine by a return -1 and it did the trick. I know its not the best
> thing to do, but it was the simplest thing I thought about.

2.6.21 is way too old version for hda-intel, thus not worth to debug.
Please try the latest ALSA HG tree at first (instead of 1.0.14
release).  Tons of fixes have been done there.


Takashi