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So I just built a PC, and tried to boot Ubuntu off of a USB flash drive. It has been at the purple Ubuntu screen with the loading dots for over 30 minutes, what should I do?

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possible duplicate of My computer boots to a black screen, what options do I have to fix it? (also covers purple screens) – gertvdijk Jan 31 '13 at 1:57
You should be able to hit ESC during the boot to remove the splash screen and see what step of the boot process it's getting hung up on. – Alex Jan 31 '13 at 2:18

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