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

[Takashi Iwai]

On Mon, 29 Aug 2016 10:33:34 +0200,
Markus Trippelsdorf wrote:
> 
> On 2016.08.29 at 10:15 +0200, Takashi Iwai wrote:
> > 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.
> 
> Hmm, I have no /dev/snd/hwC0D0:

Build your kernel with CONFIG_SND_HDA_HWDEP=y.

> @@ -174,12 +174,12 @@ Node 0x14 [Audio Input] wcaps 0x10051b:
>      bits [0xe]: 16 20 24
>      formats [0x1]: PCM
>    Power states:  D0 D1 D2 D3
> -  Power: setting=D0, actual=D0
> +  Power: setting=D3, actual=D3

So it's 0x14.


Takashi