We suck in power management ...

[Thomas Donnelly]

Thomas Donnelly wrote:
Hasso Tepper wrote:
Matthew Dillon wrote:
 
    est is far prefered over the ACPI idle hook.  The ACPI hook is a
disaster and frankly shouldn't be used.
    
Well ... I have here hacked together est module for core 2 CPU's 
(mainly work done by Michal Belczyk [1]) and the result is that 
although changing voltage has effect, changing frequency doesn't have 
any effect to power usage or heat. CPU is just slower. I havent 
digged deep into it yet, though ...
[1] - 
http://leaf.dragonflybsd.org/mailarchive/bugs/2007-04/msg00099.html

  
Just thought I would chime in here. Most people already know this, 
but, the reason that the lower frequency is brought into play is that 
the decreased voltage isn't stable at that frequency. A lower 
frequency allows a lower voltage.

-=Tom