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    SubjectRe: [linux-usb-devel] 2.6.19-rc5 regression: can't disable OHCI wakeup via sysfs
    On Sat, 11 Nov 2006, Andrey Borzenkov wrote:

    > On Tuesday 20 June 2006 00:12, David Brownell wrote:
    > > > > > > An alternative (but post-boot) workaround _should_ be
    > > > > > >
    > > > > > > echo disabled > /sys/bus/pci/devices/0000:00:02.0/power/wakeup
    > > > >
    > > > > Did that work?
    > > >
    > > > No. But
    > > >
    > > > echo -n disabled >
    > > > /sys/devices/pci0000:00/0000:00:02.0/usb1/power/wakeup
    > >
    > > That's what I meant ... thanks, and sorry for the confusion.
    >
    > this does not work anymore in current rc5. After writing
    > cat /sys/devices/pci0000:00/0000:00:02.0/usb1/power/wakeup shows "disabled"
    > but messages continue to be logged.
    >
    > Anything I can do to help narrow it down?

    Undoubtedly this change in behavior is caused by the "autostop" code I
    added to ohci-hcd. It doesn't check the "wakeup" attribute.

    Dave, is there any clue about exactly what triggers the immediate wakeup?
    If you could tell me what to test for, I could try writing a patch to fix
    it. Perhaps the driver needs a "resume_detect_is_broken" quirk.

    Andrey, if you aren't using USB at all (you mentioned that no devices were
    plugged in), you can simply do "rmmod ohci-hcd" to stop all those log
    messages.

    Alan Stern

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