After I installed mythbuntu 188.8.131.52 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:
linux /vmlinuz root=/dev/sda1 ro acpi=off noapic
and it boots up although I cannot select 1080p as a resolution when I believe it was running at that before. Also those commands seem very slow. It takes a minute or two before linux and initrd return.
Here is my /etc/default/grub
# If you change this file, run 'update-grub' afterwards to update
# For full documentation of the options in this file, see:
# info -f grub -n 'Simple configuration'
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
# Uncomment to enable BadRAM filtering, modify to suit your needs
# This works with Linux (no patch required) and with any kernel that obtains
# the memory map information from GRUB (GNU Mach, kernel of FreeBSD ...)
# Uncomment to disable graphical terminal (grub-pc only)
# The resolution used on graphical terminal
# note that you can use only modes which your graphic card supports via VBE
# you can see them in real GRUB with the command `vbeinfo'
# Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux
# Uncomment to disable generation of recovery mode menu entries
# Uncomment to get a beep at grub start
#GRUB_INIT_TUNE="480 440 1"