Description of problem:
Using powertop the most significant wakeups per second come from ohci_hcd
interrupt. The processor also never enters any C states below C0. Unplugging the
two USB devices (usb mouse, and internal bluetooth - disabled by switch) reduce
the wakeups but the processor still doesn't use anything below C0.
"rmmod ohci_hcd" solves the problem and allows the CPU to sleep (C2 state).
The laptop in question is an HP nx6125. The problem existed with all F7 kernels,
all F8 kernels and the current (6th Dec 07) development kernel from rawhide.
I am passing the "usbcore.autosuspend=1" kernel parameter in grub.conf. This
make no difference.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
There is a third USB device attached, a fingerprint scanner. This is not
associated with any driver but I am unable to disable it physically. As this
device is not controlled by a driver I assume it cannot be the reason for the
Changing version to '9' as part of upcoming Fedora 9 GA.
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