powertop (from svn) tells me that my CPU is stuck in C2 70% of the time until 
- i enable usb-autosuspend with powertop
- or remove uhci_hcd myself. 
after which C2 drops to zero.

At the same time cat /sys/bus/usb/devices/*/power/level reports AUTO for all 
values.
No usb-devices are used except for a internal fingerprint reader which is not 
set up (no modules loaded).
Kernel is 2.6.22-14-generic from Gutsy.

Can anyone explain this please?

-- 
Powertop make wrong suggest to add usbcore.autosuspend=1
https://bugs.launchpad.net/bugs/136549
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