[Bug 57965] New: Hidden windows cannot be created without an X server

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=57965

Bug ID: 57965
           Summary: Hidden windows cannot be created without an X server
           Product: Wine
           Version: unspecified
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

I learned in the thread https://groups.google.com/g/innosetup/c/7GVs3eO5DHc,
that hidden Windows are also used for IPC even if nothing needs to be
displayed.

Unfortunately wine does not support that it seems.

I wanted to run the InnoSetup installer
(https://files.jrsoftware.org/is/6/innosetup-6.3.3.exe) in absolute quite mode
that never needs to display any window on GitHub Action runner with image
ubuntu-24.04 where no X server is running.

The command I tried to execute is

wine innosetup-6.3.3.exe /SP- /VERYSILENT /SUPPRESSMSGBOXES /NORESTART

but the execution fails and among other this it displays

002c:err:winediag:nodrv_CreateWindow Application tried to create a window, but
no driver could be loaded.

As a work-around I started Xfvb using `Xvfb :0 -screen 0 1024x768x16 &` before
running that command and then it works without problems.

But it would be nice if wine would support such hidden windows up until
something needs to actually be displayed, at which point it would probably be
appropriate to fail execution.