[ltp] PM on Thinkpad T41

[Micha Holzmann]

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Quoting Stephan Frank <sfrank@cs.tu-berlin.de>:
> On Thu, 1 Apr 2004, Micha Holzmann wrote:
>=20
> > Quoting Stephan Frank <sfrank@cs.tu-berlin.de>:
> > > try as root:
> > >
> > > echo "userspace" > /sys/devices/system/cpu/cpu0/cpufreq/scaling_gover=
nor
> > > echo "600000" > /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed
> > >
> > > a 'cat /proc/cpuinfo' should now show a cpu Mhz of around 600.
> >
> > Unfortunately not, it shows still "cpu MHz         : 1395.819"
>=20
> Hmm, this is weird.
>=20
> If you shut down every scaling daemon which might be running
> (via '/etc/init.d/powernowd stop' etc.; only one should be running
> anyway, but I made the mistake of having accidentally run two different
> daemons concurrently which gave quite weird scaling behaviour)
> and then do a
>=20
> echo "userspace" > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
> echo "600000" > /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed
> cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed

It is only powernowd installed. I shutdown powernowd.


pwd
/sys/devices/system/cpu/cpu0/cpufreq

for i in *; do echo $i:; cat $i; done
cpuinfo_max_freq:
1400000
cpuinfo_min_freq:
600000
scaling_available_governors:
userspace powersave performance
scaling_driver:
centrino
scaling_governor:
userspace
scaling_max_freq:
600000
scaling_min_freq:
600000
scaling_setspeed:
600000

grep -i "^cpu.*mhz" /proc/cpuinfo
cpu MHz         : 1395.819


> Sorry, I'm starting to get a bit baffled and running out of ideas why
> this not working for you.

What i am getting confused is, with 2.6.1 it was ok. The speed was
598 MHz. After echoing powersave into scaling_governor

I am running out of ideas too.

Gruss,
Micha Holzmann

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