[Bug 106757] Qt's QOpenGLWidget renders a blank screen under XWayland

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=106757

            Bug ID: 106757
           Summary: Qt's QOpenGLWidget renders a blank screen under
                    XWayland
           Product: Mesa
           Version: 18.0
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/i915
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: myk321 at gmail.com
        QA Contact: dri-devel at lists.freedesktop.org

Created attachment 139886
  --> https://bugs.freedesktop.org/attachment.cgi?id=139886&action=edit
Qt Application renders correctly using MESA software rendering

With intel integrated graphics, the Qt Surface example, that uses
QOpenGLWidget, on Fedora 28 under an wayland session and then run under
xwayland by starting the Qt application using the command:

./surface -platform xcb

results in the Qt application being displayed correctly, but the 3D data
visualization is shown incorrectly as blank panel  (see attached).

The same Qt application in a Wayland session with MESA software rendering also
under xwayland as follows:

LIBGL_ALWAYS_SOFTWARE=1 ./surface -platform xcb

results in the application and 3D data visualization being displayed correctly
(see attached).

The same Qt application in a XOrg session results in the application and 3D
data visualization being displayed correctly.

The same Qt application in a Wayland session run under wayland results in the
application and 3D data visualization being displayed correctly.

This issue is logged as a Qt defect here:
https://bugreports.qt.io/browse/QTBUG-68263

A similar issue is described for GNU Octave here:
https://savannah.gnu.org/bugs/?51442

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