cpu scalling with a pentium M on Ubuntu

[Gump2]

Anyone else having issues with cpu scaling on their laptops? I read
the article about cpu scaling from eclug.homelinux.org, but some
reason my install of ubuntu will not scale the cpu. So i know I have
a 1.2 GHz processor but it is running at 600MHz. Not fun.
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 9
model name : Intel(R) Pentium(R) M processor 1200MHz
stepping : 5
cpu MHz : 598.520
cache size : 1024 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr mce cx8 sep mtrr pge mca cmov pat
clflush dts acpi mmx fxsr sse sse2 tm pbe up bts est tm2
bogomips : 1198.32
clflush size : 64
I have tried powernow, cpufreqd, cpudyn with no luck.
Any suggestions?

Thanks,
Kenny

[Byron Holldorf]

Kenny,

Try looking at
/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies. It
should list all possible running speeds. If there is one entry something
is likely wrong with ACPI. That would not be all that surprising since it
is not completely standardized and may bios manufacturers have outright
bugs. The dmesg command may give you some hint of such a problem. There
are some kernel options that may help in this regard (I think maybe
acpi=no?)

Also look at the file scaling_available_governors in the same dir. It
should have all the possible options for the processor's speed control
(mine has performance, ondemand, and userspace). If performance is there,
do like so:

echo "performance" > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor

That should set the CPU to max speed.

Hopefully that's a start.

Byron

--
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[Eau Claire Linux User Group]

Check these two posts:

The first one will help you to find out what are your computer
available frequencies
http://ubuntu.wordpress.com/2005/11/04/enabling-cpu-frequency-scaling/

The other one will help you to set it up to desired frequency.
http://www.howtoforge.com/cpu_frequency_scaling_ubuntu

Good Luck
ec_lug