Problem when rebooting Ubuntu 11.04 Server X86 after fresh install.
It caused the screen to be blank and a monitor message of overrange settings. This was traced to the setting of gfxmode=auto
in the /boot/grub/grub.cfg
you have to boot Ubuntu into rescue mode using the media CD/DVD/Memory Stick you used to install the system with.
From the command prompt make the /boot/grub/grub.cfg
writable using chmod +w /boot/grub/grub.cfg
Now edit the file using vim /boot/grub/grub.cfg
The settings that worked for me were as follows gfxmode=1024x768
and with an entry gfxplayload=keep
added directly after the gfxmode line.
After editing hit esc
key then type wq
and then hit enter this will write the file and quit vim.
Now reboot your system and hope it works.
What a mucking around to fix this stupid fault.
Information Source I used