Re: linux-next: Tree for June 20: [regression] No sound on SB600

[Takashi Iwai]

At Mon, 23 Jun 2008 16:32:08 +0200,
Rafael J. Wysocki wrote:
> 
> On Monday, 23 of June 2008, Takashi Iwai wrote:
> > At Sat, 21 Jun 2008 21:25:41 +0200,
> > Rafael J. Wysocki wrote:
> > > 
> > > On Saturday, 21 of June 2008, Takashi Iwai wrote:
> > > > At Sat, 21 Jun 2008 17:28:09 +0200,
> > > > Rafael J. Wysocki wrote:
> > > > > 
> > > > > On Friday, 20 of June 2008, Stephen Rothwell wrote:
> > > > > > Hi all,
> > > > > > 
> > > > > > Changes since next-20080619:
> > > > > > 
> > > > > > The net tree lost its conflict against Linus' tree.
> > > > > > 
> > > > > > The bkl-removal tree lost a conflict.
> > > > > 
> > > > > On one of my test boxes with the ATI chipset (SB600 south bridge) there's no
> > > > > sound output.  Bisection shows that the following commit causes this to happen
> > > > > and reverting the commit fixes the problem for me:
> > > > > 
> > > > > commit cf97e6678f1e1e7bbdb566c36771540123832a31
> > > > > Author: Takashi Iwai <tiwai@xxxxxxx>
> > > > > Date:   Mon Jun 16 15:47:26 2008 +0200
> > > > > 
> > > > >     ALSA: hda - Fix wrong volumes in AD1988 auto-probe mode
> > > > >     
> > > > >     Don't create mixer volume elements for Headphone and Speaker if they
> > > > >     use the same DAC as normal line-outs on AD1988.  Otherwise the amp
> > > > >     value gets screwed up, e.g.
> > > > >     	https://bugzilla.novell.com/show_bug.cgi?id=398255
> > > > >     
> > > > >     Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
> > > > > 
> > > > > Please let me know if you need any additional information.
> > > > 
> > > > Could you run alsa-info.sh with --no-upload option and attach the
> > > > output for both states with and without that commit?  The script is
> > > > found at
> > > > 	http://www.alsa-project.org/alsa-info.sh
> > > > Also, show the relevant kernel message from snd-hda-intel (informing
> > > > the auto-parsing of pins, etc), too.
> > > 
> > > dmesg outputs and the outputs of 'alsa-info.sh --no-upload' for the kernel with
> > > the patch applied (1) and with the reverted (2) are at:
> > > 
> > > http://www.sisk.pl/kernel/debug/20080620/box2/dmesg-1.log
> > > http://www.sisk.pl/kernel/debug/20080620/box2/alsa-info-1.txt
> > > 
> > > http://www.sisk.pl/kernel/debug/20080620/box2/dmesg-2.log
> > > http://www.sisk.pl/kernel/debug/20080620/box2/alsa-info-2.txt
> > 
> > Well, this is actually no regression but an unlucky side-effect of the
> > fix.
> > 
> > In the old version, "Front" volume didn't work properly because of
> > confliction with a bogus "Headphone" volume.  Now, a wrong volume
> > element is removed but only "Front" remains while "Front" wasn't set
> > up properly.
> > 
> > In short, the below should fix the problem:
> > 
> > 	% amixer set Front 90%
> 
> Well, okay, but where should I add that to make KDE mixers work, for example?

You must have "Master" volume control now.  This also changes Front,
etc.  Try to reassign Master as the default volume in kmix.


Takashi
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