[alsa-devel] model needed for Clevo P150HM (Realtek ALC892)

Takashi Iwai tiwai at suse.de
Mon Jul 18 13:19:42 CEST 2011

At Mon, 18 Jul 2011 13:15:14 +0200,
Julian Sikorski wrote:
> W dniu 18.07.2011 10:52, Takashi Iwai pisze:
> > And I can't reproduce your problem with the alsa-info.sh output above.
> > Give more exact information what you did and what is the problem.
> >
> >
> > thanks,
> >
> > Takashi
> I'm sorry for the confusion - let me sum up the current situation. With 
> the fixes you pushed to sound-2.6/master I was able to get 5.1 sound out 
> of my laptop. The only missing bit was the 7.1 sound. And the last 
> channel goes via a jack/optical spdif hybrid. The problem is that the 
> BIOS does not announce that and as such alsa is unaware of the side 
> surround channel.
> Using Raymond's advice, I was able to make the sound come out of the 
> last jack, by changing some values for pin 0x17 (described as sidesurr 
> in the datasheet), diff is attached. I basically checked what was the 
> difference in alsa-info.sh output when I was changing number of channels 
> with alsamixer, and then did the same for pin 0x17.
> Since, from what I understood, you wanted me to figure out which pin is 
> connected to the last jack [1], I thought this information would be 
> useful to fix BIOS shortcomings.

Yes, and note that you can set up the initial pin configurations
dynamically via sysfs, too.

> Other problem is that the volume on that jack is controlled by center 
> and lfe sliders (in alsamixer), which is probably caused by the fact 
> that alsa is unaware of the 7.1 sound.

And this is not what I can't reproduce.

> If more information is needed, please let me know what do you need in 
> addition to alsa-info.sh output.

First off, double-check whether the CLFE mixer really changes the pin
amp.  At best, take alsa-info.sh output snapshot before and after
changing the mixer state, and compare the files (better give both
files in the mail).


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