[Bug 93746] New: Black screen when reconnecting display with DRI3

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=93746

            Bug ID: 93746
           Summary: Black screen when reconnecting display with DRI3
           Product: xorg
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
          Assignee: xorg-driver-ati at lists.x.org
          Reporter: linux at bernd-steinhauser.de
        QA Contact: xorg-team at lists.x.org

One of my screens (Eizo EV2455) has an odd behaviour: When switched off, it
completely kills the connection, which is very annoying, but that's not the
issue here.

However, when I turn it on again, I'm presented with a black screen on that
screen only (the other two work fine).
I can see the mouse pointer, I can see it changing shape when over a text
field, but the window itself is not visible, its hidden behind the blackness.

The issue goes away when I set
Option      "DRI" "2"

Please see
https://bugs.kde.org/show_bug.cgi?id=357988
as well.

GPU is an AMD Kaveri. Kernel is 4.4.0. Mesa is currently scm, but I've seen
this with 10.x as well. xf86-video-ati is 7.6.1.

What other info do you need?

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