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My computer boots to a black screen, what options do I have to fix it?

I wanted to try Ubuntu first before installing so I put it on a flash drive. I boot the the drive no problem but after I choose Try Ubuntu without installing the screen becomes a black screen with colorful lines in random places and stays there.

The flash drive works in my laptop (ATI Mobility Radeon 5650M) but I want this on my desktop. Is this fixable or am I outta luck?

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marked as duplicate by Jorge Castro, belacqua, con-f-use, stephenmyall, Tom Brossman Oct 24 '12 at 10:06

This question was marked as an exact duplicate of an existing question.

This answer should help you solve the problem. – Aditya Feb 20 '13 at 12:47

Please see the following link:

how to set nomodset for installation

you need to set nomodeset option in your grub file.

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An alternative to Ankit's method of setting nomodeset, is to instead set nouveau.modeset=0. Also I recommend using Tab instead of e in GRUB2 1.99-21ubuntu3.1 as e didn't do it for me.

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