[Bug 80355] DP MST problems with xrandr while re-docking

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=80355

--- Comment #10 from Chris Wilson <chris at chris-wilson.co.uk> ---
This should avoid the second crash:

commit dca0f1c2ccf14df38764ed12b971dc491cf22608
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Sun Jun 22 17:53:59 2014 +0100

    sna: Track CRTC mode changes and discard old flips

    If we have a pending flip across a modeset we must be careful to drop
    the stale flip_bo after the modeset.

    Reported-by: Sree Harsha Totakura <freedesktop at h.totakura.in>
    References: https://bugs.freedesktop.org/show_bug.cgi?id=80355#c8
    Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>


One issue is that no DP report a MST path, which explains the absence of any
connector called something like: DP1-2.

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