[Bug 48070] New: Regression: Virtual Desktop not decorated anymore by the window manager

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=48070

            Bug ID: 48070
           Summary: Regression: Virtual Desktop not decorated anymore by
                    the window manager
           Product: Wine
           Version: 4.17
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: critical
          Priority: P2
         Component: -unknown
          Assignee: wine-bugs at winehq.org
          Reporter: adrian.kalla at gmail.com
      Distribution: ---

OS: Kubuntu 18.04 x64

Since Wine 4.17 when using the "Emulate a virtual desktop" the virtual
desktop-window is not decorated anymore by the window manager even if "Allow
the window manager to decorate the windows" is checked.


This results not only in the fact, that the window cannot be moved by drag&drop
of the title-bar (which can be work-arounded using the taskbar, at least with
KDE).

Steps to reproduce:
1. Check "Emulate a virtual desktop"
2. Check "Allow the window manager to decorate the windows"
3. Open winecfg
4. See, that the virtual desktop is not decorated

Expected result:
-Virtual desktop is decorated


The worst thing is, that any full-screen application leaving full-screen
results now in the "virtual desktop" expanding to the full size of the display
the app was on making it unusable.

Steps to reproduce:
1. Check "Emulate a virtual desktop"
2. Check "Allow the window manager to decorate the windows"
3. Open winecfg
4. In the same Wine environment open a full-screen game, e.g. the demo version
of The Settlers 3:
http://s3de.siedler3.net/ftp.bluebyte.com/demos/eng/settlers3amazons/s3a_demo_us.exe
5. See, that the virtual desktop is not decorated
6. Exit the game
7. See, that the complete display was now overtaken by the virtual desktop
(though the usable area is only in the top-left of the display and in the size
of virtual desktop).
8. Only killing the other open apps in the Wine env makes the display usable
again. 

Expected result:
-Virtual desktop does not make the display unusable

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