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I installed Ubuntu 12.04 a couple of months ago. I keep experiencing a purple screen (once in a while) after selecting Ubuntu 12.04 in grub. Then I have reboot (by pressing the power button). Not sure why, please help!

Here are my specs: amd phenom p920 1.6ghz ati hd 5730 1gb graphics card 4gb ddr3 ram

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Install graphics driver as told here - askubuntu.com/q/124292/35775 and then whether the problem persists. –  Web-E Jan 16 '13 at 5:13
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