Just installed FC5 on Intel core duo T2600 system (MSI 945GT Speedster motherboard).
Frequency scaling worked out of the box (cpuspped - style), but just for cpu0 (core 0). The other core (cpu1) runs all the time on the max clock frequency (2.16GHz), even with minimal system load.
Then stopped cpuspeed, tried ondemand:
service cpuspeed stop
modprobe cpufreq_ondemand
echo ondemand > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
echo ondemand > /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor
with the same result - CPU freq scaling works just for cpu0.
Last command gave "No such file or directory" error, so
I found out, that /sys/devices/system/cpu/cpu1/cpufreq does not exist!


ls /sys/devices/system/cpu/cpu0/
cache cpufreq crash_notes topology

ls /sys/devices/system/cpu/cpu1/
cache crash_notes online topology

Any idea how to make this work?
Is it udev/sysfs issue?

Kernel 2.6.17-1.2174_FC5smp

cat /proc/cpuinfo

processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 14
model name : Genuine Intel(R) CPU T2600 @ 2.16GHz
stepping : 8
cpu MHz : 1000.000
cache size : 2048 KB
physical id : 0
siblings : 2
core id : 0
cpu cores : 2
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc pni monitor vmx est tm2 xtpr
bogomips : 4320.82

processor : 1
vendor_id : GenuineIntel
cpu family : 6
model : 14
model name : Genuine Intel(R) CPU T2600 @ 2.16GHz
stepping : 8
cpu MHz : 2158.020
cache size : 2048 KB
physical id : 0
siblings : 2
core id : 1
cpu cores : 2
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc pni monitor vmx est tm2 xtpr
bogomips : 4316.02

Problem solved by flashing motherboard BIOS.

MSI 945GT Speedster comes with 1.0bC BIOS version, which is probably beta.
Flashing to real 1.0 downloaded from MSI support site fixed the speedstep problem.

Tijn
Which cpufreq driver do you use? I can't get cpufreq work with my Core 2 Duo E6300.