On Sat, 2012-10-20 at 09:44 +0000, John Frankish wrote: > I've been trying to get a Logitech usb headset to work on two different machines both running the same software: > > pulseaudio-2.0, kernel-3.0.21, alsa-1.0.25 > > Bus 002 Device 006: ID 046d:0a0b Logitech, Inc. ClearChat Pro USB > > mac mini: > Things appear as normal, I can use pavucontrol to direct output to the > headset speakers, but there appears to be no way to record sound from > the headset microphone using gnome-sound-recorder or skype-4.0.0.8, > the headset microphone appears in the "record" tab of pavucontrol, Do you mean the "Input Devices" tab? > but nothing is recorded. Is even silence recorded? On the "Recording" tab of pavucontrol, do you see the gnome-sound-recorder or skype stream, and does the UI say that it's connected to the usb headset microphone? > No pulseaudio error messages appear and the usb microphone will not > work even when the internal sound card is completely disabled. > > dell latitude e6220: > When the usb headset is plugged in, it appears for a few seconds in > pavucontrol then disappears for a few seconds and then reappears > again. This continues for as long as the headset is plugged in - see > attached log. Note that it is not possible to disable the internal > sound from pavucontrol, it is re-enabled as soon as the usb headset > appears again. The log shows that udev reports the device getting repeatedly removed and added, so that problem is at a lower level than pulseaudio. It's certainly possible to disable the internal sound card in pavucontrol. Go to the Configuration tab and select the "Off" profile for the internal card. -- Tanu