While watching the input volume meter from my webcam in
pavucontrol, it maxes out with a short (100ms or so) cracking sound every ~3 seconds, independently of the ambient sound. How can I get rid of it?
Looks like this has already been reported, but the project was abandoned. I don't suppose it would help to bribe with a bounty? :)
$ lsusb | grep -i cam Bus 002 Device 004: ID 046d:08ce Logitech, Inc. QuickCam Pro 5000
From the Linux UVC driver footnotes:
1 First and second generation Logitech webcams suffer from firmware bug which make the camera somehow unstable. As the issue is timing-related, the exact impact of the bug on a particular user can't be predicted. If you plan to buy a Logitech webcam, consider getting one of the models not affected by the bug. More information about the issue, including possible workarounds, are available on the QuickCam Team website.
2 Starting at version 2.6.22, the Linux kernel includes a USB audio bug fix which triggers a (possibly identical to the above) bug in first and second generation Logitech webcams. See the Linux UVC wiki for a workaround.
Both references are down, so I guess that's it for this camera.