The common between this bug and bug #904347 are both hda codec only have "Headphone Playback Switch" and there is no "Headphone Playback Volume"
I wonder why ubuntu did not include commit 356aab7d419822f413af5fe1bc47af40957a23fb
ALSA: hda - Add Headphone Playback Volume control for ad1988/ad1989
- use DAC0 instead of DAC1 for Port-A Headphone
- assign 0x03 to spec->multiout.hp_nid except model="6stack-dig-fp"
The common between this bug and bug #904347 are both hda codec only have "Headphone Playback Switch" and there is no "Headphone Playback Volume"
I wonder why ubuntu did not include commit 356aab7d419822f 413af5fe1bc47af 40957a23fb
ALSA: hda - Add Headphone Playback Volume control for ad1988/ad1989
- use DAC0 instead of DAC1 for Port-A Headphone
- assign 0x03 to spec->multiout. hp_nid except model=" 6stack- dig-fp"