I also have this annoying CPU whine occurance when my CPU changes to C4.
As I have Linux running on my x300 (Ubuntu 8.10) deactivating Power-Management in bios is not an option because then I cannot adjust the display-brightness with the function-buttons anymore.
Is it possible to deactivate C4 with a shell script?
EDIT/ I had to reinstall gnome-power-manager after deactivating power-mgmt in bios, adjusting brightness now works again.
Yet, my question still remains.
Thanks in advance
Go to Solution.
Here is how to do it: