linux-kernel - Re: [REGRESSION] Sound goes too fast due to 798cb7e897210

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Message-ID: <s5hzkgy1zf1.wl%tiwai@suse.de>
Date:	Tue, 18 Oct 2011 10:23:14 +0200
From:	Takashi Iwai <tiwai@...e.de>
To:	Éric Piel <Eric.Piel@...mplin-utc.net>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>, alsa-devel@...a-project.org,
	david.henningsson@...onical.com,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [REGRESSION] Sound goes too fast due to 798cb7e897210

At Tue, 18 Oct 2011 10:10:14 +0200,
Éric Piel wrote:
> 
> Dear Takashi,
> 
> I have a regression here on 3.1-rc9+ causing the sound "going too fast" 
> with hda. Reverting 798cb7e897210 (ALSA: hda - Fix a regression of the 
> position-buffer check) fixes this regression for me.
> 
> Of course, as this commit is itself a regression fix, my goat feeling is 
> that it's not going to be possible to directly revert it. Attached if 
> the output of alsa-info.sh (on the fixed kernel). Please let me know if 
> I can provide you any additional information or test any patch.

If that commit affects, the best fix would be to give a quirk specific
to your device.  Try to pass either position_fix=1 or position_fix=2.
Only one of them should work (likely 2).

After checking it, you can add it to position_fix_list[] in
sound/pci/hda/hda_intel.c together with PCI SSID.


thanks,

Takashi
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