In my case, this is apparently because HP broke SpeedStep in their F.05 rev of the NC6400 bios (reference: http://bugzilla.kernel.org/show_bug.cgi?id=7157). I can't revert to the F.03 rev, because it doesn't support my CPU (T7200). However, there's nothing that Ubuntu can do about this: HP has to release a new bios rev to re-enable SpeedStep.
I don't know if this explanation applies to the original submitter, but it's worth checking to see if SpeedStep works in Windows XP. On my broken-bios setup, Control Panel > Power Options shows no SpeedStep tab. To me, this proves that the issue is in the bios, not in the OS. If that isn't the case for the original poster, I apologize for the distraction. -- No frequency scaling on Core2Duo https://launchpad.net/bugs/64605 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
