From: Konstantin Khlebnikov <khlebnikov@openvz.org>
To: Takashi Iwai <tiwai@suse.de>,
"alsa-devel@alsa-project.org" <alsa-devel@alsa-project.org>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Jaroslav Kysela <perex@perex.cz>,
David Henningsson <david.henningsson@canonical.com>
Subject: Re: [ALSA hda 3.4-rc] suspend2ram regression in snd_hda_intel
Date: Sun, 06 May 2012 12:32:14 +0400 [thread overview]
Message-ID: <4FA6370E.9000702@openvz.org> (raw)
In-Reply-To: <4FA38371.9020205@openvz.org>
Konstantin Khlebnikov wrote:
> Mainline commit 785f857d1cb0856b612b46a0545b74aa2596e44a
> ("ALSA: hda - Set codec to D3 forcibly even if not used")
> breaks sound for my notebook (thinkpad x220),
> looks like codec cannot wake from power-save state after resume.
> After reverting looks like all works fine.
>
> how to reproduce:
> * unplug the power cord (to enable hda power safe mode)
> * play something and stop
> * wait until the background noise disappears (codec went into power-save mode)
> * suspend
> * resume
> * play something again and hear the silence
> --
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Bump
BTW, I don't see any locks around hda power-save code, for example hda_power_work() reads
codec->power_on and codec->power_count without any locks. This seems racy.
next prev parent reply other threads:[~2012-05-06 8:32 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-04 7:21 [ALSA hda 3.4-rc] suspend2ram regression in snd_hda_intel Konstantin Khlebnikov
2012-05-06 8:32 ` Konstantin Khlebnikov [this message]
2012-05-06 10:37 ` Takashi Iwai
2012-05-08 7:13 ` Konstantin Khlebnikov
2012-05-08 8:11 ` Takashi Iwai
2012-05-08 8:49 ` Takashi Iwai
2012-05-08 13:05 ` Konstantin Khlebnikov
2012-05-08 13:08 ` [PATCH bugfix v3.4] ALSA: hda - fix "silence after S3" regression Konstantin Khlebnikov
2012-05-08 13:25 ` Takashi Iwai
2012-05-08 13:38 ` Konstantin Khlebnikov
2012-05-08 14:29 ` Takashi Iwai
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