Re: [Bisected Regression] snd-intel-hda no longer produces sound on Toshiba Satellite A100

[Takashi Iwai <tiwai@suse.de>]

At Sat, 03 May 2008 23:57:29 +0300,
Vefa Bicakci wrote:
> 
> Hello,
> 
> I am using Debian Sid on a Toshiba Satellite A100 series laptop.
> This laptop has an Intel HDA sound card. It uses the Realtec codecs.
> After modprobe'ing snd-intel-hda, the following appears in dmesg:
> "hda_codec: Unknown model for ALC861, trying auto-probe from BIOS..."
> 
> The sound output used to work fine with 2.6.24.x and 2.6.25. In an
> unrelated move, I decided to give 2.6.25-gitX series a try; however,
> I was very sad to notice that sound output became disabled. Programs
> such as ogg123 or Amarok seem to play, but there is no sound output,
> only silence. I have checked multiple times that no new mixer settings
> appeared because of a possible snd-hda-intel update...
> 
> I bisected the differences between 2.6.25 and HEAD (as of 28th of
> April) to find the problematic git commit. The git commit with the
> following ID and description disables the sound output completely:
> 
> --- 8< ---
> commit f6c7e5461e9046445d50c5c7a9a4587824239623
> [ALSA] hda-codec - Fix auto-configuration of Realtek codecs
> --- >8 ---
> 
> I believe that this is an important regression, and I would like
> to debug this problem. Trying out patches is no problem for me.

This is a known issue and should have been already fixed on sound
tree.  Try to pull the following git tree (for-linus branch):
    git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6 for-linus


thanks,

Takashi