[alsa-devel] Bug on Dell Vostro 5480 (Intel Wildcat) kernel driver

[Paulo Roberto de Oliveira Castro]

http://hastebin.com/raw/kixaqaloqe

2015-07-28 0:35 GMT-03:00 Paulo Roberto de Oliveira Castro <
p.oliveira.castro at gmail.com>:

> Hi everyone,
>
> After installing Fedora 22 on my Dell Vostro 5480, the speakers don't
> work, and the sound only comes out of the subwoofer. Here is the output
> of alsa-info.sh. After talking to "debianuser" on IRC, we found this
> workaround:
>
> sudo hda-verb /dev/snd/hwC1D0 0x14 SET_PIN_WIDGET_CONTROL 0x40 # enable,
> set it to OUT
> sudo hda-verb /dev/snd/hwC1D0 0x14 SET_CONNECT_SEL 0 # switch to 0x0c
> sudo hda-verb /dev/snd/hwC1D0 0x14 SET_AMP_GAIN_MUTE 0xa000 # unmute left
> sudo hda-verb /dev/snd/hwC1D0 0x14 SET_AMP_GAIN_MUTE 0x9000 # unmute right
>
> We suspect that it's a kernel driver bug. This makes the speakers work
> alongside the headphones (both at the same time) but I need help making
> it working when headphones are not plugged in.
>
> Thanks,
>
> Paulo
>