Re: Mic lowering sensitivity when sound is played through the headphones
I had the same problem.
It's a setting in Skype.
Open and login to Skype.
Click on Main Menu on bottom far left > Options > Sound Devices:
You will see a line checked off saying 'Allow Skype to automatically adjust my mixer levels'
Uncheck that box, hit Apply then close it out and restart Skype and it should work fine. Now you can manually adjust mike settings and they will stay. All you may have to do is adjust your mike setting in sound settings, or PulseAudio Volume Control if you installed it, to the level you like and it should run fine.
Ubuntu 12.04 64bit Ext4 on a Dell Studio XPS Desktop Intel® Core™ i7-860 2.8GHz, 8GB DDR3 ram and Dual booting: Ubuntu 14.04 64bit Ext4 & 32bit Vista Home Premium, on a Toshiba laptop dual core AMD Turion 64, 2.0 GHz, 4GB ram.