Is anyone successfully using the external microphone jack on a Thinkpad
T42?  My mic is working; I've tested it (and the software) on another
machine.  I can record successfully using the built-in mic.

I suspect that the problem is my mixerctl settings.  I've tried all of the
record.source values that 'mixerctl -a -v' lists; for inputs.mic.source,
I've tried mic0 and mic1.  All of the input mute values are off.
pkgsrc/audio/xwave is not showing any input sounds at all, so I doubt it's
any input record levels.  

		--Steven M. Bellovin, http://www.cs.columbia.edu/~smb