Breezy upgrade, CPUFreq problem

['Forum Post]

Sarangan Thuraisingham / துரைசிங்கம் சாரங்கன் Wrote: 
> 'Forum Post wrote:

> Sorry I missed this conversation before. Is this something to with the
> 

> broken cpufreq driver for P4s, i.e., p4-clockmod. I had this problem 

> where my CPU would only scale down from 2.66 GHz to 2.33 GHz. In Hoary,
> 

> it will go all the way to 333 MHz.

> 

> So if this patch you are talking about is indeed a solution to this 

> problem, I would definetly want in. Could you please provide more
> info?

> 

> -- 

> Regards,

> - Saru

> 

> 

> > Sarangan Thuraisingham / துரைசிங்கம் சாரங்கன் Wrote: 
> > 'Forum Post wrote:[color=blue]

> > 

> > Sorry I missed this conversation before. Is this something to with the
> > 

> > broken cpufreq driver for P4s, i.e., p4-clockmod. I had this problem 

> > where my CPU would only scale down from 2.66 GHz to 2.33 GHz. In Hoary,
> > 

> > it will go all the way to 333 MHz.

> > 

> > So if this patch you are talking about is indeed a solution to this 

> > problem, I would definetly want in. Could you please provide more
> > info?

> > 

> > -- 

> > Regards,

> > - Saru

> > 

> > There is a bug in the Intel specification of some of their CPUs... this
> > problem is known as N60 Errata, Because of this bug, some of the Intel
> > CPUs Hang when working below 2 Ghz(under linux)... so ubuntu kernel is
> > patched to see if your CPU have the N60 Errata, if so, it doesn't let
> > you to put your CPU freq under 2 GHz.... but It makes a lot of false
> > positives.... saying that you have the bug when it's not true.... so
> > i've make P4 optimized Breezy kernels with the detection phase of the
> > bug disabled... so these kernels DO NOT DETECT THE BUG.... and then you
> > can always work at frequencies below 2Ghz... If you were a false
> > positive, your computer will work perfectly at any frequency.. but if
> > you really have the bug, then your computer will hang with these
> > kernels....

> > 

> > I've packaged 2 packages, one for P4 without hyperthreading and another
> > without Hypertheading... they work for P4, Celeron (p4 Based) or
> > centrino CPUs

> > 

> > You don't have to forget to add the p4-clockmod module (or the one for
> > the centrino that i don't remember the name now), I've added it to my
> > /etc/modules file

> > 

> > Cilynx is going to host the kernels so everybody can download it, We
> > have to thank him for this.


-- 
djkork