[Bug 71260] SNA in zaphod mode (multiple screens) has rendering issues with Xnest

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=71260

--- Comment #11 from intelgraphics7 at gmx-topmail.de ---
Here is the recipe to reproduce the issue:

1. start the X server with SNA enabled and two displays enabled (I've not
tested
     only one display so far but I guess it should show the issue as well)

2. start a window manager (I'm using xfwm4) on that X server (make sure it does
     opaque window moves)

3. start Xnest on that X server: "Xnest :1 &"

4. start a window manager in Xnest: "DISPLAY=:1 xfwm4 &" (make it does opaque
     window moves as well)

5. start a terminal window in Xnest: "DISPLAY=:1 xfce-terminal &"

6. start another app i.e with GTK file dialog; I used totem: "DISPLAY=:1 totem
&"
   - NOTE: The totem main window does not show any issues, but the file dialog
           (Movie->Open...) does, see next step.

7. Move the terminal window over the file dialog. Wipe it over the totem file
dialog; you should see rendering corruptions there.

8. Move the totem file dialog over the xfce-terminal window.
   You should see corruption there as well. But the cause seems to be
different.

9. Move the whole Xnest window so it goes beyond your physical screen extents,
then move the Xnest window back into screen. You'll notice that some of the
windows within the Xnest window are not redrawn correctly


I hope this is not too complicated to reproduce for you. If I missed something
or you're not able to reproduce the issues, just let me know.

Best regards

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