2016-2-18 下午5:38於 "Bob Ham" bob.ham@collabora.com寫道：
Make ALSA profiles stick around and update their availability if the HDMI ELD changes. This alters the presence of card profiles quite dramatically. Specifically, the existing autogeneration of profiles generates a large set of input/output mapping combinations and all of these combinations are reported by the API, marked as unavailable. To give an idea of the consequences, here is what pavucontrol looks like with this patch:
https://people.collabora.com/~rah/pavucontrol-unavailable-profiles.png
Similarly, here is the output of "pactl list cards":
https://people.collabora.com/~rah/pactl-list-cards-output.txt
AFAIK,
1) mono is not supported by hda-intel 2) those desktop with three jacks at rear panel need retasking input jacks to output jacks by changing control channel mode from 2ch to 6ch, you may need to add hook for alsa devices to change the channel mode in alsa HDA-Intel.conf 3) even HDMI codec support 8 channels, it still require your hdmi monitor support multi channels