linux-kernel - Re: [BUG, bisect] ALSA: hda

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Date:	Fri, 29 May 2015 09:37:44 +0200
From:	Takashi Iwai <tiwai@...e.de>
To:	Jeremiah Mahler <jmmahler@...il.com>
Cc:	linux-kernel@...r.kernel.org, Jaroslav Kysela <perex@...ex.cz>,
	alsa-devel@...a-project.org
Subject: Re: [BUG, bisect] ALSA: hda - No sound output

At Fri, 29 May 2015 00:27:14 -0700,
Jeremiah Mahler wrote:
> 
> Takashi, all,
> 
> On several of my machines there is no longer any sound output when
> running the latest linux-next (20150528).  Activity can be seen in a
> mixer such as pavucontrol suggesting that there should be sound, but
> both the speakers and head phones are silent.
> 
> I have bisected the kernel and found that the following patch introduced
> the bug.
> 
>   From 49fb18972581a781658a4637de76e6069ed5964e Mon Sep 17 00:00:00 2001
>   From: Takashi Iwai <tiwai@...e.de>
>   Date: Wed, 27 May 2015 08:37:19 +0200
>   Subject: [PATCH] ALSA: hda - Set stream_pm ops automatically by generic parser
>   
>   This allows user to test power_save_node feature via sysfs or patch
>   firmware even on the codecs that don't specify it.  It'll also save a
>   few lines.
>   
>   Signed-off-by: Takashi Iwai <tiwai@...e.de>
>   ---
>    sound/pci/hda/hda_generic.c    | 5 ++++-
>    sound/pci/hda/patch_realtek.c  | 1 -
>    sound/pci/hda/patch_sigmatel.c | 1 -
>    sound/pci/hda/patch_via.c      | 1 -
>    4 files changed, 4 insertions(+), 4 deletions(-)

I still don't figure out why this breaks. 
Could you give alsa-info.sh output of the affected machine?


thanks,

Takashi
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