cpu frequencies

[Tobias Bocanegra]

hi,
i have a intel dual core t2700 with 2.16ghz.

vendor_id       : GenuineIntel
cpu family      : 6
model           : 14
model name      : Genuine Intel(R) CPU           T2600  @ 2.16GHz
stepping        : 8

the files in /sys/devices/system/cpu/cpu0/cpufreq say:
affected_cpus:0
cpuinfo_cur_freq:1667000
cpuinfo_max_freq:2167000
cpuinfo_min_freq:1000000
scaling_available_frequencies:2167000 1667000 1333000 1000000
scaling_available_governors:userspace performance
scaling_cur_freq:1667000
scaling_driver:centrino
scaling_governor:userspace
scaling_max_freq:1667000
scaling_min_freq:1667000
scaling_setspeed:1667000

now, i try to set 2.17 ghz, but it always stays at 1.7:

echo 2167000 > scaling_setspeed
# cat cpuinfo_cur_freq
1667000

i tried every possible combination, and also other cpu frequency tools
like cpufreqd and cpufreq-set

funny enough, it worked suddenly once 2 days ago...but i can't figure
out what was different. i guess, it's either some chipset-internal
regulation, or some cpu daemon running.

has anyone some advice?
regards, toby