Comment 4 for bug 367739

I am also seeing the same issue but on different hardware and the x86_64 version of 9.04.

My hardware is:
Abit AB9 Pro Motherboard
4GB DDR-2 800
Intel Pentium Dual Core E2180

CPU0 will not scale, but CPU1 will scale.

/sys/devices/system/cpu/cpu0/cpufreq$ sudo grep "." *
affected_cpus:0
cpuinfo_cur_freq:2750000
cpuinfo_max_freq:2750000
cpuinfo_min_freq:1650000
related_cpus:0
scaling_available_frequencies:2750000 2200000 1650000
scaling_available_governors:conservative ondemand userspace powersave performance
scaling_cur_freq:1650000
scaling_driver:acpi-cpufreq
scaling_governor:performance
scaling_max_freq:1650000
scaling_min_freq:1650000
scaling_setspeed:<unsupported>

/sys/devices/system/cpu/cpu0/cpufreq$ cpufreq-info
cpufrequtils 004: cpufreq-info (C) Dominik Brodowski 2004-2006
Report errors and bugs to <email address hidden>, please.
analyzing CPU 0:
  driver: acpi-cpufreq
  CPUs which need to switch frequency at the same time: 0
  hardware limits: 1.65 GHz - 2.75 GHz
  available frequency steps: 2.75 GHz, 2.20 GHz, 1.65 GHz
  available cpufreq governors: conservative, ondemand, userspace, powersave, performance
  current policy: frequency should be within 1.65 GHz and 1.65 GHz.
                  The governor "ondemand" may decide which speed to use
                  within this range.
  current CPU frequency is 1.65 GHz.
  cpufreq stats: 2.75 GHz:0.49%, 2.20 GHz:0.66%, 1.65 GHz:98.85% (5)
analyzing CPU 1:
  driver: acpi-cpufreq
  CPUs which need to switch frequency at the same time: 1
  hardware limits: 1.65 GHz - 2.75 GHz
  available frequency steps: 2.75 GHz, 2.20 GHz, 1.65 GHz
  available cpufreq governors: conservative, ondemand, userspace, powersave, performance
  current policy: frequency should be within 1.65 GHz and 2.75 GHz.
                  The governor "ondemand" may decide which speed to use
                  within this range.
  current CPU frequency is 1.65 GHz.
  cpufreq stats: 2.75 GHz:15.31%, 2.20 GHz:0.06%, 1.65 GHz:84.63% (123)