Do you boot with some power saving parameters like i915.rc6=7? If so, remove ALL of them and try again.
Is that the HM65 chipset in that notebook? I have a Ivy Bridge CPU on the HM77 chipset and I had initially some problems with the scaling not working correctly but after a few reboots cpupower has worked without ever having a problem anymore...
Is that the HM65 chipset in that notebook? I have a Ivy Bridge CPU on the HM77 chipset and I had initially some problems with the scaling not working correctly but after a few reboots cpupower has worked without ever having a problem anymore...