Hi List!

Is there any way to figure out what is causing the CPU to stay in C2?

I currently have this happening for 2 reasons:

- uhci_hcd is loaded. I dont think that usb autosuspension is working
at all but nobody seems to care. I guess i should install a vanilla
kernel so that i can annoy the kernel mailing-list directly. Currently
since 2.6.24 from Ubuntu Hardy there is no way for both my cores to go
into C3 unless i unload uhci_hcd myself.

- sometimes for an totally unknown reason and only after longer
uptimes one core is suddenly stuck in C2 as well and i have no idea
why.

What are your experiences with usb-autosuspension?

Regards,
Sascha

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