I make it work using comment #123 solution, just the alsa-base.conf modification, did not install any backported module.
on 3.2.0-23-generic #36-Ubuntu SMP x86_64 x86_64 x86_64 GNU/Linux
Ubuntu 12.04
I might add that in Ubuntu Sound preferences I've two input device, referring to that only device. If I keep the first selected, as in attached screenshot, it works. If I switch to the second one, it got back to the usual issue.
I had the same issue with C910 camera + mic.
I make it work using comment #123 solution, just the alsa-base.conf modification, did not install any backported module.
on 3.2.0-23-generic #36-Ubuntu SMP x86_64 x86_64 x86_64 GNU/Linux
Ubuntu 12.04
I might add that in Ubuntu Sound preferences I've two input device, referring to that only device. If I keep the first selected, as in attached screenshot, it works. If I switch to the second one, it got back to the usual issue.