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

[Paulo Roberto de Oliveira Castro]

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