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): F7,F8,rawhide How reproducible: Consistently Steps to Reproduce: 1.Boot 2.Powertop 3.rmmod ohci_hcd 4.Powertop Actual results: 100% C0 Expected results: <100% C0 Additional info: 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 interrupt.
Changing version to '9' as part of upcoming Fedora 9 GA. More information and reason for this action is here: http://fedoraproject.org/wiki/BugZappers/HouseKeeping
This message is a reminder that Fedora 9 is nearing its end of life. Approximately 30 (thirty) days from now Fedora will stop maintaining and issuing updates for Fedora 9. It is Fedora's policy to close all bug reports from releases that are no longer maintained. At that time this bug will be closed as WONTFIX if it remains open with a Fedora 'version' of '9'. Package Maintainer: If you wish for this bug to remain open because you plan to fix it in a currently maintained version, simply change the 'version' to a later Fedora version prior to Fedora 9's end of life. Bug Reporter: Thank you for reporting this issue and we are sorry that we may not be able to fix it before Fedora 9 is end of life. If you would still like to see this bug fixed and are able to reproduce it against a later version of Fedora please change the 'version' of this bug to the applicable version. If you are unable to change the version, please add a comment here and someone will do it for you. Although we aim to fix as many bugs as possible during every release's lifetime, sometimes those efforts are overtaken by events. Often a more recent Fedora release includes newer upstream software that fixes bugs or makes them obsolete. The process we are following is described here: http://fedoraproject.org/wiki/BugZappers/HouseKeeping
Fedora 9 changed to end-of-life (EOL) status on 2009-07-10. Fedora 9 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. Thank you for reporting this bug and we are sorry it could not be fixed.