When the module intel_pstate is loaded (for intel speedstep) acpi_cpufreq fails to load and only the governors "performance" and "powersave" are available and for some reason the extension fails to load.
Might be because a different way should be used to get the governor list (but i'm just guessing here). Disabling pstate with "intel_pstate=disable" on the grub command line allows acpi_cpufreq to be loaded and the extension loads just fine.
I really want to use intel_pstate as it's the default driver loaded for my cpu (as of 3.9 kernel i think). Anyway, I guess this needs more investigation.
When the module intel_pstate is loaded (for intel speedstep) acpi_cpufreq fails to load and only the governors "performance" and "powersave" are available and for some reason the extension fails to load.
Might be because a different way should be used to get the governor list (but i'm just guessing here). Disabling pstate with "intel_pstate=disable" on the grub command line allows acpi_cpufreq to be loaded and the extension loads just fine.
I really want to use intel_pstate as it's the default driver loaded for my cpu (as of 3.9 kernel i think). Anyway, I guess this needs more investigation.