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    SubjectRe: various laptop nagles - any suggestions? (note: 2.6.19-rc2-mm1 but applies to multiple kernels)
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    On Fri, 2006-10-20 at 11:07 -0700, Andrew Morton wrote:
    > > > So you're saying that CONFIG_NO_HZ breaks the touchpad?
    > >
    > > yes. At least for Acer Travelmate 8000 and HP nx6310 and HP nx7400.
    > > Other than the touchpad - there is not a lot of common hardware between
    > > these units. The readout becomes highly unreliable. (in X it starts
    > > jumping around - it SORT OF resembles the output)
    > >
    > > My suspicion is a timing problem in the synaptic USB driver
    >
    > OK, that's going to be hard to fix and it'd be awkward (and unpopular) to
    > make inclusion of the dynamic-ticks feature dependent on fixing this.
    > (Then again, it'd get Ingo into device drivers ;))

    Maybe Ingo is the lesser evil than me when it comes down to device
    drivers :)

    > However I would suggest that NO_HZ (at least) be dependent upon
    > CONFIG_EXPERIMENTAL, no?

    Fair enough.

    > Also, NO_HZ breaks my laptop (and presumably quite a few others) quite
    > horridly, which means nobody can ship the feature. Some runtime
    > turn-it-off work needs to be done there.

    We can make a commandline switch as for highres. Is that sufficient ?

    tglx


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