[alsa-devel] No sound after suspend-to-ram

[George Gugulea]

I did now with 4.3.0-rc6 and there is the same problem.
I reattached the two outputs, before and after (as a patch) suspend-to-ram:
diff -u alsa-info.txt.4.3-rc6.before alsa-info.txt.4.3-rc6.after >
alsa-info.txt.4.3-rc6.patch



On Thu, Oct 22, 2015 at 6:15 PM, Takashi Iwai <tiwai at suse.de> wrote:
> On Thu, 22 Oct 2015 10:38:37 +0200,
> George Gugulea wrote:
>>
>> After a fresh reboot, the sound works ok but if I put the computer to
>> sleep (pm-suspend), after it wakes up there is no sound anymore.
>>
>> I did try 'alsa force-reload' after suspend but still no sound.
>> After 'pm-hibernate' sound is back again.
>>
>> I found an old thread here:
>> https://bugzilla.kernel.org/show_bug.cgi?id=49421 where Michael seems
>> to have the same problem which is still unsolved; maybe I can help
>> with more info.
>>
>> I attached the 'alsa-info.sh' output before and after suspend:
>> 'alsa-info.txt.before' and 'alsa-info.txt.after' (as a patch to stay
>> below 80k mail size rule: diff -u alsa-info.txt.before
>> alsa-info.txt.after > alsa-info.txt.patch)
>>
>> The only difference between before and after is this one:
>> @@ -241,7 +241,7 @@
>>  Node 0x11 [Audio Input] wcaps 0x10051b: Stereo Amp-In
>>    Amp-In caps: ofs=0x11, nsteps=0x2e, stepsize=0x03, mute=1
>>    Amp-In vals:  [0x12 0x12]
>> -  Converter: stream=4, channel=0
>> +  Converter: stream=0, channel=0
>>    SDI-Select: 0
>>    PCM:
>>      rates [0x160]: 44100 48000 96000
>>
>>
>> The PC is here: http://www.dell.com/us/p/xps-27-2720-aio/pd?ref=PD_OC,
>> but the 2y older version with no touch
>>
>> If I boot into windows (8.1) everything works great, including sound
>> (even after suspend)
>
> Did you test with 4.3-rc kernel?  3.19 is very old.
>
> It's likely codec-specific stuff, as there is no difference seen in
> alsa-info.sh outputs (the converter is the value assigned dynamically
> at playback, so it doesn't matter at all).
>
>
> Takashi



-- 
gg
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