[Wayland-bugs] [Bug 95491] Xwayland: Wrong overall screen size in some multi-monitor layouts

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=95491

            Bug ID: 95491
           Summary: Xwayland: Wrong overall screen size in some
                    multi-monitor layouts
           Product: Wayland
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: XWayland
          Assignee: wayland-bugs at lists.freedesktop.org
          Reporter: fourdan at xfce.org
        QA Contact: xorg-team at lists.x.org

Apparently, Xwayland fails to compute the right overall desktop size in some
case such as the following layout:


               +--------------------+
               |                    |
               |                    |
 +-------------+      XWAYLAND1     |
 |             |                    |
 |  XWAYLAND0  |                    |
 |             +--------------------+
 |             |
 +-------------+

Basically, the first monitor is not placed in (0,0) but at some position
shifted down relative to the other monitor.

In which case xrandr reports:

Screen 0: minimum 320 x 200, current 3840 x 1200, maximum 8192 x 8192
XWAYLAND0 connected 1920x1080+0+381 310mm x 170mm
   1920x1080     59.96*+
XWAYLAND1 connected 1920x1200+1920+0 520mm x 320mm
   1920x1200     59.88*+


ie the overall screen height does not account for the actual location of the
first monitor (in the xample abovem it should 381 + 1080 instead of 1200)

That breaks XEvents for windows placed below y > 1200.

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