adding "radeon.modeset=0" (thus disable radeon KMS) to kernel options in
/boot/grub/grub.cfg will fix the problem
menuentry 'Ubuntu, with Linux 2.6.32-21-generic' --class ubuntu --class
gnu-linux --class gnu --class os {
recordfail
insmod ext2
set root='(hd0,2)'
search --no-floppy --fs-uuid --set 7cc5b473-d68d-41fa-a0f2-38041f11ef5a
linux /boot/vmlinuz-2.6.32-21-generic radeon.modeset=0
root=UUID=7cc5b473-d68d-41fa-a0f2-38041f11ef5a ro quiet splash
initrd /boot/initrd.img-2.6.32-21-generic
}
--
Never winter night not displaying characters
https://bugs.launchpad.net/bugs/572748
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