[QUESTION] 3 frequency steps for p3 on windows

[Simon Braunschmidt <brasimon@web.de>]

Hi,

I have a compaq armada m300 with a speedstep-enabled 600mhz pentium.
It is running ubuntu so its essentialy a 2.6.10 kernel.
Scaling the frequency dynamically works very good so far, i can choose  
between ~500mhz and ~600mhz.

However, when i boot into windows xp sp2, after installing some enabler 
programm from the compaq website, the freqency of the cpu is scaled 
dynamically with the THREE steps  ~413mhz, ~500mhz and ~600mhz, the exact 
values for 500 and 600 being the same as in linux.

So in windows i get an extra frequency option for 413mhz not available in 
linux.

Is there any chance of supporting this in linux? Since i only ever heard of 2 
frequency steps for the early p3's, i think this will be a compaq-specific 
behaviour. Is compaq giving out documentation?

please cc me

Greetings
Simon Braunschmidt


simon@heimdal:/sys/devices/system/cpu/cpu0/cpufreq$ uname -a
Linux heimdal 2.6.10-5-686 #1 Tue Apr 5 12:27:02 UTC 2005 i686 GNU/Linux

simon@heimdal:/sys/devices/system/cpu/cpu0/cpufreq$ cat /proc/cpuinfo
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 8
model name      : Pentium III (Coppermine)
stepping        : 3
cpu MHz         : 498.115
cache size      : 256 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 pae mce cx8 sep mtrr pge mca cmov pat 
pse36 mmx fxsr sse
bogomips        : 986.45

simon@heimdal:/sys/devices/system/cpu/cpu0/cpufreq$ sudo cat *
Password:
0
500000
600000
500000
600000 500000
userspace ondemand powersave performance
500000
speedstep-smi
userspace
600000
500000
500000
simon@heimdal:/sys/devices/system/cpu/cpu0/cpufreq$