It's a built in sound devince on a Dell Precision M65. However, when I fiddle a little with the Volume Control, setting the Input source combo to Line and then back to Mic again, + closing the Volume control: HDA Intel (Alsa mixer), then grabbing seems to work again.
I have a similar problem and setup, but there is no way for me to control the muting it seems from the audio control. lspci gives me this setup:
00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 01)
It's a built in sound devince on a Dell Precision M65. However, when I fiddle a little with the Volume Control, setting the Input source combo to Line and then back to Mic again, + closing the Volume control: HDA Intel (Alsa mixer), then grabbing seems to work again.