[ltp] C4 state on x60s - any news?

Obi linux-thinkpad@linux-thinkpad.org
Wed, 16 May 2007 16:20:05 -0700


have you tried on battery? My T41 won't get into C4 unless I'm battery
powered.

cheers
graziano

On Wed, May 16, 2007 at 07:48:12PM +0200, Stefan Blum wrote:
> Hi, I just recently compiled 2.6.21 to check out the power saving potential of 
> the tickless kernel with powertop. It seems like I identified a lot of the 
> processes that wake the kernel up rather often, and I can get to a decent 
> wakeup rate of around 45-50 wakeups/second on a completely idle system under 
> KDE. Now what strikes me is that the cpus only go as far as C3, and C4 
> doesn't seem to be available at all. I read through an earlier discussion on 
> this list on that specific topic, but found no solution. Now my question - is 
> there a way to enable C4 on an x60s? Maybe a bios upgrade?
> 
> Thanks in advance!
> 
> Regards, Stefan
> -- 
> The linux-thinkpad mailing list home page is at:
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-- 
+-----------------------+--------------------------+
| Graziano Obertelli    | CS Dept. Rm 102          |
| graziano@cs.ucsb.edu  | University of California |
| (805) 893-5212        | Santa Barbara, CA 93106  |
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