[Bug 107521] XWayland misrendering when switching from gui applications from maximized to half screen

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=107521

            Bug ID: 107521
           Summary: XWayland misrendering when switching from gui
                    applications from maximized to half screen
           Product: Mesa
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: All
            Status: NEW
          Severity: blocker
          Priority: medium
         Component: Drivers/DRI/i965
          Assignee: intel-3d-bugs at lists.freedesktop.org
          Reporter: mark.a.janes at intel.com
        QA Contact: intel-3d-bugs at lists.freedesktop.org

Created attachment 141005
  --> https://bugs.freedesktop.org/attachment.cgi?id=141005&action=edit
tiling corruption video

Reproduced with:

 - firefox and firefox-esr
 - thunderbird
 - konsole
 - emacs

When running Gnome on XWayland, tiling corruption can be seen by rapidly
switching the windowing position from "maximize" to "view split on left" and
"view split on right"

With default Gnome shortcuts, launch Firefox, and rapidly press super-up /
super-left / super-down / super-right.  As the window moves around the screen,
you should soon see mis-rendered tiled pixels all over the screen.

My setup is Debian testing on SKL GT2:
xwayland/testing,now 2:1.20.0-3
lib*-mesa/testing,now 18.1.4-1

I also tested with mesa master
ba1ebf2ee12 python: Specify the template output encoding

No corruption is seen when running with X instead of XWayland.

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