Grub problem

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http://ubuntuforums.org – After I installed mythbuntu to a usb drive I was getting error out of disk and no suitable mode found. After showing these errors for a few minutes it would finish booting. I read that if I uncommented GRUB_TERMINAL=console in /etc/default/grub and ran sudo update-grub that should fix the error. Well now it won't boot to mythtv at all. It just boots to a grub prompt. From there I can do: set root=(hd0,1) linux /vmlinuz root=/dev/sda1 ro acpi=off noapic initrd /initrd.img boot and it boots up although I cannot select 1080p as a resolution when I believe it was running at that (Hardware)