my Pentium M never go in C3 nor C4 modes...

[Benjamin Pineau]

On Fri, Jun 01, 2007 at 01:01:24PM +0200, Frédéric BOITEUX wrote:

> Wakeups-from-idle per second : 175.7
> Power usage (ACPI estimate) :   9.9 W (1.3 hours left)
 
But still, 9.9 W is not too bad (imho).

> Top causes for wakeups:
>   23.6% ( 60.3)       <interrupt> : yenta, yenta, radeon at pci:0000:01:00.0, 

Did you tried to set 'Option "NoDRI"' on your graphic card's "Device"
xorg.conf section ? Some have reported that this improves things for 
radeon too (and not only for i915) (and/or look at radeontool).

>    5.0% ( 12.7)   gnome-screensav : schedule_timeout (process_timeout)

I guess shutting down the screen though DPMS would be even more
energy efficient (is gnome-screensaver used to do that much wakeups ?).