x300 + CPU whine + Linux + how to disable C4 state [ Edited ]

[Tackelton]

Hi,

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

Message Edited by Tackelton on 12-23-2008 08:23 AM

[Tackelton · Accepted solution]

Issue solved.

Here is how to do it:

http://www.inliniac.net/blog/2008/07/25/fixing-noise-on-ubuntu-hardy-804-aka-setting-max_cstate.html