DragonFly bugs List (threaded) for 2012-03
[DragonFlyBSD - Bug #2090] snd_hda does not support headphone automute
Issue #2090 has been updated by ss griffon.
I don't have time to look at this but it would be useful if you could compile snd_hda with -DSND_HDA_DEBUG (I think). Then load sound module and set hw.snd.verbose=3 (again I think). Then load the snd_hda module and paste the output of /var/log/messages. There should be alot. I wish I could look into this but I don't even have a DFBSD install right now.
Bug #2090: snd_hda does not support headphone automute
Author: Justin C. Sherrill
The hda sound driver does not notice jack insert/removal events. Even when
booted verbosely, there's no action, so attaching headphones does not mute
An update to FreeBSD's sound/pci/hda expressly mentions solving this problem:
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