Re: C2, C3 and bus master activity

[pumpkin <pumpkin-Mmb7MZpHnFY@public.gmane.org>]

Hello

I tested this by removing kernel/driver/usb/* and rebuilding initrd (just to 
be sure). It did not change anything for console (still 50:50 between C2 and 
C3) and made Xorg crash pretty hard.

Do you think removing all the other external buses (Firewire, ethernet, 
WLAN ,..) would change something ? 

Could cpufreqd be part of the problem ?

Thanks,

On Tuesday 19 July 2005 22:18, Bob Lees wrote:
> Hi
>
> In a word USB.  I don't fully understand why, but if I disable USB then
> both my laptops will go into C3 or C4, with USB enabled stays in C2.
>
> Laptops are Compaq EVO 800c and IBM T42p both running SUSE 9.3 with a stock
> SuSE kernel 2.6.11-suse modified
>
> Bob
>
> On Tuesday 19 July 2005 19:50, pumpkin wrote:
> > Hello
> >
> > My CPU does not enter C3 if i run the stock configuration. Way too much
> > bus master activity. I want to find out what is causing it. Any hints how
> > to do that ?
> >
> > I found one possible cause for some of the activity. Without X i have a
> > 50:50 mix between C2 and C3. Using the vesa-driver the mix stays at
> > 50:50. Using the radeon-driver (dri disabled) the CPU stops using C3.
> >
> > the facts in case somebody already has a idea:
> > - ibm R51
> > - PentiumM 725 (1.6GHz)
> > - Intel 855PM chipset
> > - radeon 7500 mobil
> > - xorg 6.8.2
> > - kernel 2.6.11-1-686 (debian stock-kernel)
> >
> > thanks.
> >
> >
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