ACPI performance profile

Markus Schönhaber ubuntu-users at
Fri Nov 3 22:18:57 UTC 2006

Marco Mandl wrote:
> On Fri, 03 Nov 2006 15:42:26 +0100, Markus Schönhaber wrote:
> > You could use gnome-power-manager, which provides an applet that lets you
> > select clock frequencies or which scaling governor shall handle the
> > frequency selection.
> >
> > Or you could add a line like
> > /usr/bin/echo ondemand >
> > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor to /etc/rc.local to
> > select a specific scaling governor on bootup. In this case, the
> > "ondemand" governor would be selected which adjusts the cpu frequency
> > according to need.
> gnome-power-manager is just the daemon. And gnome-power-preferences does
> not provide the controls to change the profile. Is there really no better
> place to select the profile?

My bad. It's the cpufreq-applet I meant. But simply selecting it from the list 
of applets you can add to the panel could have made this clear in the first 

> It is no problem to put the line in rc.local. But such things can bring a
> lot of troubles later. When there will be relevant preference GUI later, I
> will have forgotten this little hack and will wonder why the things are
> not working then.

If I want to make sure that a specific governor is selected when the machine 
runs, I select it on system startup. One easy way to achieve this is using 
rc.local. If you don't like that "little hack" - OK, find a better solution 
and use this instead. But I don't know how you get the impression that after 
setting the the governor once you'll never ever again be able to change it.

BTW: you might want to consider setting


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