my Pentium M never go in C3 nor C4 modes...

[Arnaud Patard]

Stephen Bridges <widget at stdin.co.uk> writes:

Hi,

> On Friday 01 June 2007 12:18:39 Evgeni Golov wrote:
>> On Fri, 1 Jun 2007 13:01:24 +0200 Frédéric BOITEUX wrote:
>> > About the suggestion, I don't know if my laptop (an old one, from
>> > 2003) has ever some "HPET" ?
>>
>> X31 has an ICH4-M chipset, which does not support HPET :-(
>> (have an X31 here too - but I'm at ~50wakeups/s while idling in Xorg)
>
> The discussion on the LKML about the hpet_force patch revealed that the ICH4 
> chipset has an undocumented HPET.  I don't know if the patch enables it - a 

iirc, the thread was more specific. Only ich4m not plain ich4.

> weekend goal for my ICH4-based Vaio!

you can't use the same patch. afaik on ich4m/ich5 you have to poke the
pci registers. I've a ich4m test box where I can force enable the hpet but
the patch is breaking resume :(

Arnaud