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I've used Universal USB Installer to create a bootable USB drive to install ubuntu 12.10 desktop edition. The flash drive was booted correctly, but a black screen with a lot of messages was displayed here is the last line :

[ 506336] [drm] driver supports precise vblank timestamp query

I think that the problem is from the graphical card. There are some lines before the above one that display information about Radeon which is my graphic card type.

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As daelsta said, a bit more information about your hardware, especially graphics, would be helpful to solve this. – Flimm Jan 5 at 16:07

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