https://bugzilla.kernel.org/show_bug.cgi?id=13170

--- Comment #74 from morten vermund (mortenvermund@gmail.com) --- (In reply to morten vermund from comment #71)

(In reply to dentament from comment #64)

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Hi, I boot with 2 cpus, acpi and everything working on ubuntu 10.04 using grub 1.99 compiled following these instructions: https://webonlinegambling.com/ and with this grub.cfg:

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insmod efi_gop menuentry "Ubuntu Linux Lucid 2.6.32-33-generic" { set root='(hd0,3)' linux /boot/vmlinuz-2.6.32-33-generic root=/dev/sda3 video=efifb ro splash initrd /boot/initrd.img-2.6.32-33-generic } -----https://njonlinecasinos.webgarden.com/

But there's still a problem with this method (tried with various versions

of

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grub-efi): although it may seem the cpus do frequency switching allright, they actually always work at their minimum speed. See: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/669865