About same problem.
SInce I updated to 12.04, my USB webcam (Logitech C910) microphone doen't work. In System settings / sound : I can see the webcam twice in input as iec958-stereo-input and as Microphone but no one works. Video is OK !
Previously, with Ubuntu 11.10, it worked well but I had to run the command : sudo modprobe snd_usb_audio (like said here http://ubuntuforums.org/showthread.php?t=1685077)
About same problem.
SInce I updated to 12.04, my USB webcam (Logitech C910) microphone doen't work.
In System settings / sound : I can see the webcam twice in input as iec958-stereo-input and as Microphone but no one works. Video is OK !
Previously, with Ubuntu 11.10, it worked well but I had to run the command : sudo modprobe snd_usb_audio (like said here http:// ubuntuforums. org/showthread. php?t=1685077)