System>Preferences>SoundI could not record sound from the external microphone.
Uncheck Enable Sound Server Startup
System>Preferences>Multimedia System Selector
Set Default Sink to OSS Open Sound System
Set Default Source to OSS Open Sound System
I read number of posts in many threads with no result.
Then I went to Skype Forum and serched for "Ubuntu" and found an excellent advice:
For testing your audio-setup, I suggest you to use"aplay" and "arecord" are ALSA command line utilities. The first command did not play anything since there was no "test.wav" file.But I could record from the microphone after using "arecord" command. Then I played the recording:
aplay -D default test.wav
arecord -D default testrec.wav
aplay -D default testrec.wavThen I found that I could also record from the "Sound Recorder" of Gnome.
After fiddling with some other "Sound and Video" programs I found that I could not record the sound once again. I restarted the PC and could record once again.
I found one excellent post Unofficial Skype + Linux Sound FAQ on Skype Forum.
Hope it helps some people.