Ubuntu boot freeze / lockup with a blank purple or black screen
Ubuntu Live CD lockup
When you try to boot the Ubuntu Live CD it locks up with a purple or black screen. The workaround is to boot Ubuntu in nomodeset mode. Press F6 just as the Live CD begins to boot. At that point you shous see the boot menu. If needed press “esc” to get rid of the language menu. Then press F6 again to open up the boot option popup. Using down the arrow key move to the nomodeset option and press “Enter” Finally, press “esc” and continue to boot normally.
Installed Ubuntu lockup
After you’ve installed Ubuntu the lockup is likely to return. The workaround is slightly different. Start your computer, and press the Shift when booting up, to get the Grub menu. Use the arrow keys to navigate/highlight the entry you want (it’s usually the first one).
Press “e” to get into edit mode. then look for the line containing ”
.... quiet splash ....
using the arro keys move your cursor just past this point and enter the word nomodeset so that you now have:
.... quiet splash nomodeset ........
to continue booting.
At that point you will need to make the change permanent. Open a terminal and:
gksudo gedit /etc/default/grub
Find this line:
and modify it to give:
GRUB_CMDLINE_LINUX_DEFAULT=”quiet splash nomodeset″
Save your changes close gedit and run:
At that point and you should no longer freeze during bootup.