Comment 2 for bug 117079

Nearly the same problem here.
With Feisty upgrade, the Scaling Governor was changed to "performance", but "ondemand" was still available anyway and I could change it back.
Yesterday, I installed security updates that had been announced through Adept. Afterwards, no Governorns are available at all.
There should be sth. like "/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor" but instead, under "/sys/devices/system/cpu/cpu0/" there are only one file "crash_notes" and a folder "topology/" with four files "core_id, physical_package_id, core_siblings, thread_siblings" in it.