Comment 6 for bug 881826

Simple mixer control 'Headphone',0
  Capabilities: pswitch penum
  Playback channels: Front Left - Front Right
  Mono:
  Front Left: Playback [on]
  Front Right: Playback [on]

There is no sound when select Output profile "Headphone" in Sound Preference with ubuntu 11.04 Live CD

Is this related to the absence of "Headphone Playback Volume" by ad1988 ?

The version of alsa driver is too old

There is a patch which add "Headphone Playback Volume" for ad1988/ad1989

http://git.alsa-project.org/?p=alsa-kernel.git;a=commit;h=356aab7d419822f413af5fe1bc47af40957a23fb