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    SubjectRe: [PATCH] drm/i915: Disable high-precision vblank timestamping for UMS
    On Sunday 23 January 2011, Chris Wilson wrote:
    > On Sun, 23 Jan 2011 11:28:22 +0000, Chris Clayton <>
    > > Hi Chris,
    > >
    > > On Sunday 23 January 2011, Chris Wilson wrote:
    > > > We only have sufficient information for accurate (sub-frame)
    > > > timestamping when the modesetting is under our control.
    > >
    > > With this patch (and the earlier one) applied, X still doesn't start. At
    > > the end of xorg's log file I see:
    > >
    > > Fatal server error:
    > > Failure to wait for IRQ: No such device
    > Now we are getting closer! The X server has been caught red-handed trying
    > to use an interrupt when the driver never enabled them. Ho hum.
    > The interrupts for UMS are only enabled between EnterVT/LeaveVT, but that
    > code looks defunct. What version of xf86-video-intel are you using?

    It's 2.7.1, which, IIRC, is the latest version that will build against all the
    other xorg libraries that are on my system. I'll do a quick check after lunch
    to see if any later versions will build without me going through dependency

    Thanks for your help so far,


    > -Chris

    The more I see, the more I know. The more I know, the less I understand.
    Changing Man - Paul Weller

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