[alsa-devel] After kernel upgrade to v ~~> 4.1.0, no audio output unless UNPLUG/RE-PLUGIN of audio jack on card; OK with earlier kernels

[robert.devanna at nospammail.net]

On Mon, Jul 6, 2015, at 01:46 AM, Takashi Iwai wrote:
> The most important bit wasn't shown in the mail -- the codec name.
>
> It's a known problem with VIA codecs, and the fix was already merged
> in 4.2-rc1, the commit 735c75cf4d434862e38c01dcfb2ce8d2fcb9035f.
> The next stable 4.1.x kernel should contain the fix.

I didn't realize the script wouldn't grab the important info needed.

I think this does say it's a VIA codec here?

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 2: NVidia [HDA NVidia], device 3: HDMI 0 [HDMI 0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 2: NVidia [HDA NVidia], device 7: HDMI 1 [HDMI 1]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

cat /proc/asound/card0/codec* | grep Codec
Codec: VIA VT1708S