user32: Fake success for detaching adapters.

dlls/user32/sysparams.c

@@ -3287,6 +3287,15 @@ static void trace_devmode(const DEVMODEW *devmode)
     TRACE("\n");
 }
 
+static BOOL is_detached_mode(const DEVMODEW *mode)
+{
+    return mode->dmFields & DM_POSITION &&
+           mode->dmFields & DM_PELSWIDTH &&
+           mode->dmFields & DM_PELSHEIGHT &&
+           mode->dmPelsWidth == 0 &&
+           mode->dmPelsHeight == 0;
+}
+
 /***********************************************************************
  *		ChangeDisplaySettingsExW (USER32.@)
  */
@@ -3318,7 +3327,8 @@ LONG WINAPI ChangeDisplaySettingsExW( LPCWSTR devname, LPDEVMODEW devmode, HWND
         if (devmode->dmSize < FIELD_OFFSET(DEVMODEW, dmICMMethod))
             return DISP_CHANGE_BADMODE;
 
-        if (((devmode->dmFields & DM_BITSPERPEL) && devmode->dmBitsPerPel) ||
+        if (is_detached_mode(devmode) ||
+            ((devmode->dmFields & DM_BITSPERPEL) && devmode->dmBitsPerPel) ||
             ((devmode->dmFields & DM_PELSWIDTH) && devmode->dmPelsWidth) ||
             ((devmode->dmFields & DM_PELSHEIGHT) && devmode->dmPelsHeight) ||
             ((devmode->dmFields & DM_DISPLAYFREQUENCY) && devmode->dmDisplayFrequency))

dlls/winemac.drv/display.c

@@ -765,6 +765,15 @@ static BOOL get_primary_adapter(WCHAR *name)
     return FALSE;
 }
 
+static BOOL is_detached_mode(const DEVMODEW *mode)
+{
+    return mode->dmFields & DM_POSITION &&
+           mode->dmFields & DM_PELSWIDTH &&
+           mode->dmFields & DM_PELSHEIGHT &&
+           mode->dmPelsWidth == 0 &&
+           mode->dmPelsHeight == 0;
+}
+
 /***********************************************************************
  *              ChangeDisplaySettingsEx  (MACDRV.@)
  *
@@ -811,6 +820,12 @@ LONG CDECL macdrv_ChangeDisplaySettingsEx(LPCWSTR devname, LPDEVMODEW devmode,
         return DISP_CHANGE_SUCCESSFUL;
     }
 
+    if (is_detached_mode(devmode))
+    {
+        FIXME("Detaching adapters is currently unsupported.\n");
+        return DISP_CHANGE_SUCCESSFUL;
+    }
+
     if (macdrv_get_displays(&displays, &num_displays))
         return DISP_CHANGE_FAILED;
 

dlls/winex11.drv/settings.c

@@ -329,6 +329,15 @@ BOOL CDECL X11DRV_EnumDisplaySettingsEx( LPCWSTR name, DWORD n, LPDEVMODEW devmo
     return FALSE;
 }
 
+BOOL is_detached_mode(const DEVMODEW *mode)
+{
+    return mode->dmFields & DM_POSITION &&
+           mode->dmFields & DM_PELSWIDTH &&
+           mode->dmFields & DM_PELSHEIGHT &&
+           mode->dmPelsWidth == 0 &&
+           mode->dmPelsHeight == 0;
+}
+
 /***********************************************************************
  *		ChangeDisplaySettingsEx  (X11DRV.@)
  *
@@ -364,6 +373,12 @@ LONG CDECL X11DRV_ChangeDisplaySettingsEx( LPCWSTR devname, LPDEVMODEW devmode,
         return DISP_CHANGE_SUCCESSFUL;
     }
 
+    if (is_detached_mode(devmode))
+    {
+        FIXME("Detaching adapters is currently unsupported.\n");
+        return DISP_CHANGE_SUCCESSFUL;
+    }
+
     for (i = 0; i < dd_mode_count; i++)
     {
         if (devmode->dmFields & DM_BITSPERPEL)

dlls/winex11.drv/x11drv.h

@@ -660,6 +660,7 @@ extern void X11DRV_init_desktop( Window win, unsigned int width, unsigned int he
 extern void X11DRV_resize_desktop(BOOL) DECLSPEC_HIDDEN;
 extern BOOL is_virtual_desktop(void) DECLSPEC_HIDDEN;
 extern BOOL is_desktop_fullscreen(void) DECLSPEC_HIDDEN;
+extern BOOL is_detached_mode(const DEVMODEW *) DECLSPEC_HIDDEN;
 extern BOOL create_desktop_win_data( Window win ) DECLSPEC_HIDDEN;
 extern BOOL get_primary_adapter(WCHAR *) DECLSPEC_HIDDEN;
 extern void X11DRV_Settings_AddDepthModes(void) DECLSPEC_HIDDEN;