KDE 4.4 power management section reports no CPU frequency scaling capability even though my CPU does support this feature. What could be the problem? I'm running up to date Debian unstable.

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ree@LAPTOP:~$ cpufreq-info
cpufrequtils 007: cpufreq-info (C) Dominik Brodowski 2004-2009
Report errors and bugs to cpufreq@vger.kernel.org, please.
analyzing CPU 0:
  driver: acpi-cpufreq
  CPUs which run at the same hardware frequency: 0
  CPUs which need to have their frequency coordinated by software: 0
  maximum transition latency: 10.0 us.
  hardware limits: 996 MHz - 1.83 GHz
  available frequency steps: 1.83 GHz, 1.33 GHz, 996 MHz
  available cpufreq governors: userspace, conservative, powersave, ondemand, performance
  current policy: frequency should be within 996 MHz and 1.83 GHz.
                  The governor "ondemand" may decide which speed to use
                  within this range.
  current CPU frequency is 996 MHz.
  cpufreq stats: 1.83 GHz:8.11%, 1.33 GHz:2.30%, 996 MHz:89.59%  (24587)
analyzing CPU 1:
  driver: acpi-cpufreq
  CPUs which run at the same hardware frequency: 1
  CPUs which need to have their frequency coordinated by software: 1
  maximum transition latency: 10.0 us.
  hardware limits: 996 MHz - 1.83 GHz
  available frequency steps: 1.83 GHz, 1.33 GHz, 996 MHz
  available cpufreq governors: userspace, conservative, powersave, ondemand, performance
  current policy: frequency should be within 996 MHz and 1.83 GHz.
                  The governor "ondemand" may decide which speed to use
                  within this range.
  current CPU frequency is 996 MHz.
  cpufreq stats: 1.83 GHz:5.00%, 1.33 GHz:0.68%, 996 MHz:94.32%  (20746)


Please check with your HAL installation, to ensure that it is able to set the appropriate CPU governor.

Hm, restarting hald has fixed the problem. Seems like a bug on Debian side.