[ltp] poor battery-life on X60T

[Luming Yu]

In idle, you need to check if C-state works correctly.

On 2/7/07, Sascha Heid <saschaheid@gmail.com> wrote:
> 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
>
>
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