[ubuntu] Double problem - hdmi output & display manager

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http://ubuntuforums.org – Hello, I know this is not a new problem in Ubuntu but nothing seems to work for me. After installing Ubuntu 12.04 64bit I can't switch the sound to hdmi (TV). The icon is not in there. In the Ubuntu 12.04 32bit everything worked fine, I think I have tried everything: unmuting everything in alsamixer, installing proprietary drivers, installing pulse audio volume control. Nothing. Another problem is that after connecting to TV the computer switched to 1024x768 display (4:3) and now I can't change it because it is not active anymore. My resolution is 1366x768. Thank you for any advice because (Hardware)