[Bug 58846] New: Geneforge 1 - Mutagen (Geneforge 2 - Infestation): black screen issue

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=58846

Bug ID: 58846
           Summary: Geneforge 1 - Mutagen (Geneforge 2 - Infestation):
                    black screen issue
           Product: Wine
           Version: 10.11
          Hardware: x86-64
               URL: https://www.spiderwebsoftware.com/geneforge/downloadWi
                    n.html
                OS: Linux
            Status: NEW
          Keywords: download, regression
          Severity: normal
          Priority: P2
         Component: win32u
          Assignee: [e-mail]
          Reporter: [e-mail]
                CC: [e-mail]
   Regression SHA1: 79eb50683f56e55a1ce485f3d288983ed33f1c34
      Distribution: ArchLinux

The last two games released in the Geneforge saga display only a black screen
while running. Occasionally the game screen flashes for a fraction of a second
otherwise nothing is visible on the screen.
Reproduced with NVIDIA 580.95.05 binary drivers and with NVK/Zink/Mesa-25.2.5.

The problem is present since
commit 79eb50683f56e55a1ce485f3d288983ed33f1c34
win32u: Keep a reference to the GL drawables in the windows.

With the previous commit the games work properly.

wine-10.17-115-gff187dc851c
X.Org X Server 1.21.1.18