[alsa-devel] Problem and dirty Fix for hda-intel on ALC892

David Henningsson david.henningsson at canonical.com
Mon Mar 21 22:44:15 CET 2011

On 2011-03-21 12:37, Jan Losinski wrote:
> Hello,
> Since last week I compiled 2.6.38 on my Desktop. After booting I noticed
> a regression at the sound stuff. The surround speaker where no longer
> controlled by the master volume control. I can control it separately,
> but not with the master control that controls the front, center and
> LFE volume.
> After some debugging I found some differencies at module-loading output
> in the kernel log and in the output from alsactl store command. The
> dmesg and the diff of the alsactl output can be found at the end of this
> message.
> After that I tried to understand the hda-codec code and debugged there
> with a lot of printks and reboots. It takes another couple of hours to
> find out that the index of the surround volume and switch was 0 at pre
> 2.6.38 and is now 1. So I wrote a dirty hack to fix this (please ignore
> the debugging printks):

Hmm, I made one or two patches in relation to this but they aimed at 
moving index 1 to index 0, not the other way around. Could you please 
give alsa-info (see wiki.ubuntu.com/Audio/AlsaInfo ) information, 
preferably with 2.6.38 (and without your workaround) installed?


David Henningsson, Canonical Ltd.

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