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    SubjectRe: [Bug 10345] USB HID problems after resume
    Pavel Machek wrote:
    > On Sun 2008-03-30 13:46:25, Mark Lord wrote:
    >> Pavel Machek wrote:
    >>> On Sat 2008-03-29 13:15:40, Mark Lord wrote:
    >>> ..
    >>>> Just happened again. The machine resumed from RAM with no functioning USB.
    >>>> Still running the exact same 2.6.25-rc7 kernel as before, with the RTC conflict fixed.
    >>>>
    >>>> WTF?
    >>>> 3GB of RAM? Try iommu=soft.
    >> ..
    >>
    >> What does that option do (it is not in Documentation/kernel-parameters.txt),
    >> and why do you suspect it may make a difference here?
    >
    > See x86_64/boot-options.txt . Yes, that should be fixed.
    >
    > I had strange problems, and it looks like iommu does not have proper
    > suspend/resume support. > 3GB machines hit that. Do you have one?
    ..

    This is a 32-bit system / kernel, so I'm guessing that this option is not applicable.

    Right? (it does have 3GB of RAM, though).

    Cheers


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