Ubuntu
alsa-driver package

  1. Bug #1487168
  2. Comment #70

Comment 70 for bug 1487168

Revision history for this message
Raymond (superquad-vortex2) wrote : Re: [Emulated AD1980 AC97 inside Virualbox 5.0, playback] volume slider problem

> I would also guess that it is not likely that Virtual Box is the direct
 cause because the list of work distros runs on the same Virtualbox platform
 that serves the failing distros.

NO, the change of enumerated ac97 codec from stac9200 to ad1980 in virtualbox is the main cause of the problem

unfortuately enable log by dev_ac97 still not sufficient to produce useful debug info

you need to recompile alsa driver by adding those dev_info to dump the values of ac97 codec registers read/write

the worst thing is the ad1980 in dell imension 8400 did not work in the above bug report,

it is not clear how headphone and line out use/share volume control