voltage on an intel dual core L2400 @ 1.66GHz

voltage on an intel dual core L2400 @ 1.66GHz

[antoine]

Hello,

Just got this x60s, everything runs smoothly but for one thing which
is the battery life being 40% shorter and the whole computer running
hotter than "usual" (i.e. the 4 days I spend with windows on it).

I suspect the voltage associated to each frequency by cpufreq are too
high but couldn't find a way to check those as of now. I don't really
want to lower them, I was just wondering how they were set?

I know about the linux-PHC patch, but it seems this is only if you
wish to lower the default voltages, I merely wish to know what my
current ones are right now.

Thanks,
-- 
Antoine

Re: voltage on an intel dual core L2400 @ 1.66GHz

[Len Brown]

On Tuesday 22 August 2006 17:47, antoine wrote:
> Hello,
> 
> Just got this x60s, everything runs smoothly but for one thing which
> is the battery life being 40% shorter and the whole computer running
> hotter than "usual" (i.e. the 4 days I spend with windows on it).
> 
> I suspect the voltage associated to each frequency by cpufreq are too
> high but couldn't find a way to check those as of now. I don't really
> want to lower them, I was just wondering how they were set?
> 
> I know about the linux-PHC patch, but it seems this is only if you
> wish to lower the default voltages, I merely wish to know what my
> current ones are right now.

It might be a good idea to get an objective measurement
of the Linux battery life on the system:

http://sourceforge.net/projects/bltk

cheers,
-Len

Re: voltage on an intel dual core L2400 @ 1.66GHz

[antoine]

ok, I didn't get round to do a full test with bltk but it seems my
first impressions were wrong (not that I was extremly confident in
them to start with).

the shorten battery life seems to be a fan always on issue, the CPU
temp is low enough (well the fan is allways running) at 45/50 celsius.
After checking the blueprints it seems that what was burning my
fingers was the mini PCI express wireless card...

Sorry for the clueless questions and thanks for the help.

I may be able to provide some informations about my CPU if you guys
need it to built the tables for linux-PHC :
Genuine Intel(R) CPU           L2400  @ 1.66GHz

Once again, thanks

On 8/22/06, Len Brown <len.brown@intel.com> wrote:
> On Tuesday 22 August 2006 17:47, antoine wrote:
> > Hello,
> >
> > Just got this x60s, everything runs smoothly but for one thing which
> > is the battery life being 40% shorter and the whole computer running
> > hotter than "usual" (i.e. the 4 days I spend with windows on it).
> >
> > I suspect the voltage associated to each frequency by cpufreq are too
> > high but couldn't find a way to check those as of now. I don't really
> > want to lower them, I was just wondering how they were set?
> >
> > I know about the linux-PHC patch, but it seems this is only if you
> > wish to lower the default voltages, I merely wish to know what my
> > current ones are right now.
>
> It might be a good idea to get an objective measurement
> of the Linux battery life on the system:
>
> http://sourceforge.net/projects/bltk
>
> cheers,
> -Len
>


-- 
Antoine
http://delaunay.org/antoine