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    SubjectRe: [PATCH] drm/i915: Disable high-precision vblank timestamping for UMS
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    On Sun, 23 Jan 2011 11:28:22 +0000, Chris Clayton <chris2553@googlemail.com> wrote:
    > 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?
    -Chris

    --
    Chris Wilson, Intel Open Source Technology Centre


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