How to run my cou at lower freq

[Ralf M�rler]

Hi Santanu,

"Santanu Chatterjee" <thisissantanu at gmail.com> schrieb im Newsbeitrag 
news:42b9a27d0511202145ia9711d6r5a75f00c19856008 at mail.gmail.com...
>Hi Everybody,

> Is there some way in Ubuntu (and Linux in general) which
> will enable me to run my CPU at a somewhat lower frequency
> than the normal one?

My Pentium 4 mobile could be set to lower frequencies via cpufreq.
If you have ACPI enabled and your CPU supports frequency scaling there 
should be
/sys/system/devices/cpu/cpu0/cpufreq/
here you can set the lower frequency(s).
If it's not there try searching Intel specs, maybe there is a way to write 
directly to the MSR.
Don't know if it's adjustable over the MSR but I lower my core voltage this 
way.

IMHO this is the wrong way of solving the problem, see below!

> I have an Intel i815 based motherboard
> which does not have any option to change the CPU freq. from
> the BIOS. I need my CPU to run at say 1GHz instead of 1.8GHz.

Again, this is no solution!

> I need to do this since I am having some problems
> with the motherboard shutting down my system suddenly since the
> CPU is getting overheated. (I got this checked and this does not
> seem to be a problem with the CPU fan)

Maybe you should check if your cooling unit fits propperly to your cpu and 
if there's
heat-conductive paste between them.
A cpu with a propperly dimensioned and installed cooling unit should never 
overheat in "normal" daily usage!
My cpu (it's in a Notebook) a P4M1500 is getting to 70°C max. with 100% cpu 
usage.

Last you can take a look at your BIOS.
The critical shutdown temps are often specified and adjustable in there.
Maybe yours set to low.

> Thanks in advance for any help.

> Regards,
> Santanu

HTH
Ralf