[ubuntu] No sound on microphone on Toshiba Laptop

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http://ubuntuforums.org – I was on Google chat using the hangout feature, and my microphone doesn't work. I have a Toshiba Satellite A665-S6086 and I'm running Ubuntu 12.04 with a Gnome 3 shell. It's been working fine before, until I tried installing Starcraft II under wine. I fear I may have screwed up some settings there. If anyone knows what information would be most helpful to post, then I'd be grateful. (Hardware)