KBios: that's correct for karmic, in lucid you should rather set GRUB_GFXPAYLOAD_LINUX=keep in /etc/default/grub and run update-grub.
KBios: that's correct for karmic, in lucid you should rather set _LINUX= keep
GRUB_GFXPAYLOAD
in /etc/default/grub and run update-grub.