Ubuntu
alsa-driver package

  1. Bug #450336
  2. Comment #3

Comment 3 for bug 450336

Revision history for this message
maxadamo (massimilianoadamo) wrote :

reproduced again:
after having upgraded the kernel the audio rolled back to "2 channels" mode, and it was not possible to change it from pulseaudio tools.

Workaround:
$ run alsamixer (.... and enable 6 channels)
$ killall pulseaudio

pulseaudio will restart automatically and you'll get the 6 channels.