[alsa-devel] Kernel 3.2, and "speaker" controlling headphone path

Takashi Iwai tiwai at suse.de
Mon Jul 16 11:33:22 CEST 2012

At Wed, 11 Jul 2012 12:50:20 +0200,
David Henningsson wrote:
> It seems like on one machine the "Speaker Playback Volume" was part of 
> the headphone path, in combination with PulseAudio this is leading to 
> muted headphones.
> One of my colleagues wrote a workaround for that specific machine - I'm 
> providing links in case you're interested:
> The patch:
> https://launchpadlibrarian.net/109499922/restrict_bass.patch
> Alsa-info:
> https://launchpadlibrarian.net/109251353/bad-kernel-yes-headphones.txt
> Bug link:
> https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/994685

This doesn't happen with the recent kernel, right?

As far as I've tested with hda-emu, 3.6 kernel picks up the headphone
path as the primary, as this has the least badness value.



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