[Bug 89658] Displays on T440s' external DP over MST regularly blank

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89658

Chris Wilson <chris at chris-wilson.co.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |NEEDINFO
                 CC|                            |intel-gfx-bugs at lists.freede
                   |                            |sktop.org
          Component|Driver/intel                |DRM/Intel
           Assignee|chris at chris-wilson.co.uk    |intel-gfx-bugs at lists.freede
                   |                            |sktop.org
            Product|xorg                        |DRI

--- Comment #1 from Chris Wilson <chris at chris-wilson.co.uk> ---
I presume it is a DP link retraining event that starts the snowball rolling. If
you keep drm.debug=6 active and then grab the dmesg once the proverbial hits
the fan, that would help.

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