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Re: reducing power usage of Fedora - how you can help!





On 8/14/07, Chuck Ebbert <cebbert redhat com> wrote:
On 08/14/2007 04:39 AM, dragoran wrote:
> On my laptop (core2duo based) S06cpuspeed causes 100 wakeups/sec .
> Seems like its already noted here:
> http://linuxpowertop.org/known.php#ondemand
> "Intel fixed this and the patches to the kernel to effectively remove
> this timer are included in Linus' tree as of 2.6.22-rc1." I am running
> 2.6.22.1-41.fc7 which should already have this changes but it seems the
> problem isn't solved yet.
> doing the suggested
> "
> cd /sys/devices/system/cpu/cpu0/cpufreq
>
> cat ondemand/sampling_rate_max > ondemand/sampling_rate
> "
> does fix the wakeups (S06cpuspeed) is no longer on the list .. but it
> takes some seconds for the cpu to change pstate running glxgears 2-3
> seconds later cpu goes to 2.17ghz closing it I have to wait other 2-3
> second to be back at 1ghz
> without the "fix" it does this almost immediately.
> any idea how this can be fixed?
>

What governor is it using? If it's "ondemand" I don't see why cpuspeed
should even be running at all.

yes its ondemand.
but in the config its just GOVERNOR=


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