[alsa-devel] Dynamic HDMI PCM creation
tiwai at suse.de
Mon Sep 10 15:01:05 CEST 2012
as we discussed at Plumbers, I tried some hack to create/delete
HDMI/DP PCM stream per hotplug/unplug. Test patches are found in
sound-unstable git tree topic/hdmi-dynamic-pcm branch
The patches are all small and easy, but it's still in a pretty rough
cut. It won't handle some cases, e.g. unplug during suspend, or
such, I'm afraid. After all, it's just a test.
With these patches, the PCM device appears and disappears properly
upon HDMI/DP hotplug/unplug on my system. On mine, it appears as
/dev/snd/pcmC0D8 as it's an Intel on-board. So far, so good.
Now the problem is that PA gets confused when this happens. It can
switch to HDMI/DP, but then the analog output disappears from PA's
profile. You cannot switch back to analog output after that, even
after you unplug HDMI/DP cable.
Or, it might be my PA version... I'll check newer one.
But it'd be good if you also check in your side.
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