sudo modprobe acpi-cpufreq
WARNING: All config files need .conf: /etc/modprobe.d/framebuffer_blacklist.pacsave, it will be ignored in a future release.
FATAL: Error inserting acpi_cpufreq (/lib/modules/2.6.30-ARCH/kernel/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.ko): No such device