[Bug 60343] New: Euro Truck Simulator 2 fails to start using OpenGL renderer with the EGL backend

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=60343

            Bug ID: 60343
           Summary: Euro Truck Simulator 2 fails to start using OpenGL
                    renderer with the EGL backend
           Product: Wine
           Version: 11.12
          Hardware: x86-64
               URL: https://store.steampowered.com/app/227300/Euro_Truck_S
                    imulator_2/
                OS: Linux
            Status: NEW
          Keywords: regression
          Severity: normal
          Priority: P2
         Component: win32u
          Assignee: [e-mail]
          Reporter: [e-mail]
                CC: [e-mail]
  Target Milestone: ---
   Regression SHA1: e0a0ab55202d78f5cb85a81433b91f1d53b9d4b2
      Distribution: ---

Euro Truck Simulator 2 fails to start when its OpenGL renderer is selected
while Wine is using the EGL OpenGL backend ("no valid graphics device was
found" error).
The DirectX 11 renderer continues to work.

Reproducible with the Euro Truck Simulator 2 Demo available on Steam (download
size 23 GiB!).
Select <Launch with OpenGL> from the launch options.

This is a regression between Wine 11.11 and Wine 11.12 and is still present in
Wine 11.17-git.

I identified the following commit as the first bad commit:
commit e0a0ab55202d78f5cb85a81433b91f1d53b9d4b2
win32u: Share all unix-side GL contexts with a global context.

The parent of this commit works: the game starts successfully with its OpenGL
renderer.
A regular Wine terminal log does not show any additional useful error messages.

Game: Euro Truck Simulator 2, Steam version 1.61.1.0s
GPU: NVIDIA GeForce GTX 1660 SUPER
Driver: NVIDIA proprietary driver 615.71.09
Desktop session: X11 / XFCE
wine-11.17-322-g67eb19d662b

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