[ubuntu] Black screen when booting new install of 11.10, cannot access tty1

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http://ubuntuforums.org – I installed 11.10 on my desktop. After the intro screen from the Intel motherboard, I just get a black screen. I've looked at the various fixes online which would require access to tty1 but hitting Ctrl+Alt+F1 doesn't work for me. I just remain stuck at the screen. I have an AMD Radeon HD 6450 video card. I've re-booted without any USB devices plugged in and tried the upgrade from 11.10 to 11.10 option as suggested in a forum. Still get the black screen. So now I would like to try: Code: Hit Ctrl+Alt+F1 at the blank screen to get you to a non-X terminal (tty1)     Logi (Hardware)