[ltp] poor battery-life on X60T

[Sascha Heid]

Am Sonntag, den 04.02.2007, 15:19 +0100 schrieb Laurent Gilson:
> Hello,
> 
> > Now im looking for something i could have missed, but i have frequency
> > scaling running and working (compile-times vary as expected), and every
> > intel-speedstep support is in my kernel. Im also running laptop-mode for
> > the hdd.
> 
> You will miss linux-PHC (support for core and core 2 is planed but not  
> released).

I just tried PHC and was able to run 1GHz at 0.7V instead of 1.006,
Unfortunately though it makes zero difference (maybe 1 minute).
I get 4:40h with max Display-Brightness when im just booting to console,
idling, no wlan, no hdd, no whatever.

Should PHC make any difference at all if the CPU is idle?

PS: I believe PHC does indeed change the Voltage because the
voltage-ramp-down script freezes the box as well as decreasing the
Voltage too much on the higher clocks (0.7V is the minimum).

Sascha