Martin, on Ubuntu (Karmic) you should edit the file /etc/default/grub and add the options in the GRUB_CMDLINE_LINUX parameter, so that it reads: GRUB_CMDLINE_LINUX="enable_mtrr_cleanup mtrr_spare_reg_nr=1" then run
update-grub
Martin, on Ubuntu (Karmic) you should edit the file /etc/default/grub and add the options in the GRUB_CMDLINE_LINUX parameter, so that it reads: LINUX=" enable_ mtrr_cleanup mtrr_spare_ reg_nr= 1"
GRUB_CMDLINE_
then run
update-grub