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Dual Monitor, screen flashing problem - Ubuntu 13.04

I've just upgraded from 12.10 to 13.04 and now my screen flickers an awful lot when it is set up to use both monitors. I know for sure it isn't a hardware problem: when I set it to use only 1 monitor, ...
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2k views

Dual Monitor with high resolution

I got some trouble with my dual monitor setup. My monitors: Iiyama 22" 1680x1050 Samsung SyncMaster TA350 24" 1920x1080 My graphics card is an AMD Radeon 5750 and I installed the additional AMD driver ...