[alsa-devel] No sound for several minutes after reboot

[Takashi Iwai]

On Sat, 27 Aug 2016 13:39:08 +0200,
Markus Trippelsdorf wrote:
> 
> On 2016.08.27 at 11:50 +0200, Markus Trippelsdorf wrote:
> > Hi,
> > 
> > since several kernel releases I get no sound for several minutes after
> > reboot. After this delay it starts working normally.
> > 
> > Is this some kind of speaker protection? Is there a parameter that I can
> > set to get sound immediately?
> > 
> >  % aplay -l
> > **** List of PLAYBACK Hardware Devices ****
> > card 0: SB [HDA ATI SB], device 0: VT1708S Analog [VT1708S Analog]
> >   Subdevices: 1/1
> >   Subdevice #0: subdevice #0
> > card 0: SB [HDA ATI SB], device 3: VT1708S Digital [VT1708S Digital]
> >   Subdevices: 1/1
> >   Subdevice #0: subdevice #0
> > card 1: HDMI [HDA ATI HDMI], device 3: Generic Digital [Generic Digital]
> >   Subdevices: 1/1
> >   Subdevice #0: subdevice #0
> > 
> > card 0, device 3 [VT1708S Digital] is the device that I use. It is a
> > TOSLINK-S/PDIF link to my DAC.
> 
> Here is the diff (bad (after reboot) vs. good (after a few minutes)):
> 
> @@ -121,7 +121,7 @@
>    Control: name="Surround Playback Volume", index=0, device=0
>      ControlAmp: chs=3, dir=Out, idx=0, ofs=0
>    Amp-Out caps: ofs=0x2a, nsteps=0x2a, stepsize=0x05, mute=0
> -  Amp-Out vals:  [0x1c 0x1c]
> +  Amp-Out vals:  [0x26 0x26]
>    Converter: stream=0, channel=0
>    PCM:
>      rates [0x5e0]: 44100 48000 88200 96000 192000
> @@ -174,12 +174,12 @@
>      bits [0xe]: 16 20 24
>      formats [0x1]: PCM
>    Power states:  D0 D1 D2 D3
> -  Power: setting=D0, actual=D0
> +  Power: setting=D3, actual=D3
>    Connection: 1
>       0x1e

So this looks like the only significant change.  Others are about the
volume level, and should lead to the complete mute.

Could you try to adjust the power state manually while it happens?

hda-verb /dev/snd/hwC0D0 0xXX SET_POWER 0x00

where 0xXX is filled with the node number of this widget.

BTW, at the next time, take a diff with -p option.  This will show the
node ID in the diff.


Takashi