linux-kernel - Re: [REGRESSION] 4.1-rc4: Sound muted after boot

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Date:	Thu, 21 May 2015 10:53:46 +0200
From:	Martin Steigerwald <martin@...htvoll.de>
To:	Takashi Iwai <tiwai@...e.de>
Cc:	linux-kernel@...r.kernel.org, alsa-devel@...a-project.org
Subject: Re: [REGRESSION] 4.1-rc4: Sound muted after boot

Am Donnerstag, 21. Mai 2015, 06:28:24 schrieb Takashi Iwai:
> At Wed, 20 May 2015 16:31:55 +0200,
> 
> Martin Steigerwald wrote:
> > Hello!
> > 
> > On ThinkPad T520 (Intel Sandybridge) with 4.14-rc4 + two BTRFS patches
> > and one Intel P-State debug patch I have no sound output on internal
> > Intel HD audio codec.
> > 
> > According to ThinkPad T520 LED with striked-through speaker the loud
> > speaker is in disabled state. Also KDE´s Phonon says a soundcard is
> > missing. In alsa-mixer I see nothing as MM for muted. If I press the
> > key next to the LED I get a notification on the desktop that loud
> > speaker has been enabled / disabled, but the LED still is on for it
> > being disabled.
> > 
> > I do not hear anything in Amarok or with aplay. alsa-mixer sound volumes
> > are 100 for master and PCM. I also tried with disabling "Auto-Mute
> > Mod", but still no sound.
> > 
> > When I reboot and in BIOS or GRUB press the key then the LED toggles
> > state.
> > 
> > When I reboot into Linux 4.0.1 sound is working fine and loud speaker
> > disabled LED is toggled off, so I bet this is a regression 4.1-rc4
> > compared to 4.0.1.
> 
> Please run alsa-info.sh at both working and non-working cases (with
> old and new kernels), and attach the outputs. Run the script with
> --no-upload option.

All attached.

I also have full dmesg outputs available in case it is needed.
 
> Also, such a problem is rather the device permissions problem.
> Check the device permissions of /dev/snd/* files (also check getfacl
> /dev/snd/*, too).

If its a permissions problem, why does it happen with 4.1-rc4, but not with 
4.0.1 oder any earlier kernels?

Thanks,
-- 
Martin 'Helios' Steigerwald - http://www.Lichtvoll.de
GPG: 03B0 0D6C 0040 0710 4AFA  B82F 991B EAAC A599 84C7
View attachment "alsa-info.txt.ursyqnYmTQ-4.1rc4-muted.txt" of type "text/plain" (37538 bytes)

View attachment "alsa-info.txt.tQczbEsAxk-4.0.1-working.txt" of type "text/plain" (37726 bytes)

View attachment "setfacl-4.0.1-working.txt" of type "text/plain" (2209 bytes)

View attachment "setfacl-4.1-rc4-muted.txt" of type "text/plain" (2213 bytes)