[ubuntu] 12.04, graphics (Nvidia) problem

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http://ubuntuforums.org – On my laptop Dell Inspiron 9400 I have XP 32-bit installed for years. No graphics problem, never. I've installed Ubuntu 12.04 LTS 64-bit recently and I've got problems ever since. On both OS. I've tried quite a few different drivers for Ubuntu but I have no luck (knowledge;)). I've found out that there's lots of bugs related to combination ubuntu12-nvidia-compiz, but I found no working solution. I've already tried (and probably even managed:neutral:) to install latest Nvidia drivers 304.43. Still doesn't work. What the problem is: random freezes or random pixels broken or random signs on (Hardware)