I can confirm that after applying that change to the current 12.04 kernel (3.2.0-58.88) the microphone on the webcam works as expected, and the "set volume quirk for QuickCam E3500" message appears in dmesg from the kernel.
I can confirm that after applying that change to the current 12.04 kernel (3.2.0-58.88) the microphone on the webcam works as expected, and the "set volume quirk for QuickCam E3500" message appears in dmesg from the kernel.