[ubuntu] second monitor is detected but doesn't work

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http://ubuntuforums.org – I'm not able to set my second monitor (a Samsung TV actually) on a new PC. My previous PC runs Mint and uses it without any problem. uname -a: Code: Linux black 3.5.0-22-generic #34-Ubuntu SMP Tue Jan 8 21:47:00 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux lspci -k: Code: 01:00.0 VGA compatible controller: NVIDIA Corporation GT218 [GeForce 210] (rev a2)         Subsystem: CardExpert Technology Device 1401         Kernel driver in use: nvidia         Kernel modules: nvidia_current, nouveau, nvidiafb Operating System: Lin (Hardware)