[pulseaudio-discuss] Input sound doesn't work without power

[Tanu Kaskinen]

On Thu, 2017-01-05 at 19:12 -0300, Gustavo Duarte wrote:
> Hi all,
> 
> We are facing a problem with audio intput (mic), on a laptop with sound
> device ALC283.
> 
> When the laptop boots connected to power line, all works fine.
> 
> When the laptop boots without power line connection, sound input doesn't
> work. No audio can be recorder, using arecord or qarecord.
> 
> I got the output of "arecord -l" comand in each case. Follwoing are the
> results.
> 
> With power line connection:
> 
> **** Lista de CAPTURE dispositivos hardware ****
> tarjeta 0: PCH [HDA Intel PCH], dispositivo 0: ALC283 Analog [ALC283 Analog]
>   Subdispositivos: 1/1
>   Subdispositivo #0: subdevice #0
> 
> 
> 
> Without power line connection:
> 
> **** Lista de CAPTURE dispositivos hardware ****
> tarjeta 0: PCH [HDA Intel PCH], dispositivo 0: ALC283 Analog [ALC283 Analog]
>   Subdispositivos: 0/1
>   Subdispositivo #0: subdevice #0
> 
> 
> As yo can see, the difference is on, Subdispositivos :1/1 (with power line)
> and Subdispositivos: 0/1 without power line.
> 
> Anybody can help me resolve this ?
> Do you need some additional info ?
> 
> Thanks advance.

The problem is at alsa (or hardware) level. I suggest you try reporting
the problem to the alsa developers.

http://www.alsa-project.org/main/index.php/Bug_Tracking

-- 
Tanu

https://www.patreon.com/tanuk