[Bug 55843] Virtual Desktop spams "Failed to read display config."

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=55843

Bernhard Übelacker  changed:

What    |Removed                     |Added
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                 CC|                            |[e-mail]

--- Comment #4 from Bernhard Übelacker  ---
From a "wine notepad" I receive a few of
this "Failed to read display config" for this processes:
  wineboot.exe, start.exe, conhost.exe

This message get printed before this processes reach the
functions `init_user`/`sysparams_init`, where the static config_key would get
initialized (mentioned in #55511).

Following modification will leave update_display_cache
when the static config_key is not yet set.
This avoids the messages and feels like startup is also getting faster again.

--- a/dlls/win32u/sysparams.c
+++ b/dlls/win32u/sysparams.c
@@ -2031,2 +2031,6 @@ BOOL update_display_cache( BOOL force )

+    /* leave early when config_key is not yet set */
+    if (!config_key)
+        return TRUE;
+
     /* services do not have any adapters, only a virtual monitor */