powernowd

Jonathan Berry berryja at gmail.com
Tue Jan 4 06:19:33 UTC 2005


On Mon, 3 Jan 2005 23:44:30 -0600 (CST), Satish Balay <balay at fastmail.fm> wrote:
> On Mon, 3 Jan 2005, Jonathan Berry wrote:
> > On Mon, 03 Jan 2005 19:24:40 -1000, Amy M <amymom at hawaiilinux.us> wrote:
> > > Someone mentioned powernowd.  It did not work on my Athlon XP system:
> > >
> > > powernowd: PowerNow Daemon v0.90, (c) 2003-2004 John Clemens
> > > powernowd: Found 1 cpu:
> > > Couldn't open file: No such file or directory
> > > Couldn't open file: No such file or directory
> > > Couldn't open file: No such file or directory
> > > couldn't open govn's file for writing: No such file or directory
> > > Couldn't get per-cpu data: Illegal seek
> > > PowerNowd encountered and error and could not start.
> >
> > I'm guessing that you have ACPI turned off.  You need ACPI and the
> > files in /sys/devices/system/cpu/CPU0/cpufreq/ to use powernowd.
> 
> Nope - this is not true. cpuspeed/powernowd work with APM (on a P-M
> laptop)

Okay, I jumped the gun.  It is sysfs and the cpufreq module that are
needed.  It is still probably the case that the directory I mentioned
is not populated.  Probably either the powernow-k7 or powernow-k8
module needs to be loaded.  Most likely the k7 module.

> Are you sure you have a mobile CPU - and not a desktop CPU (in a
> laptop shell)?

Or more directly, does the CPU support frequency scaling?

> What does 'cat /proc/cpuinfo' say?
> 
> Satish

Jonathan




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