When using desktop mode attach all thread inputs together, so that

dlls/x11drv/desktop.c

@@ -91,7 +91,8 @@ static DWORD CALLBACK desktop_thread( LPVOID driver_data )
  */
 void X11DRV_create_desktop_thread(void)
 {
-    HANDLE handle = CreateThread( NULL, 0, desktop_thread, NtCurrentTeb()->driver_data, 0, NULL );
+    HANDLE handle = CreateThread( NULL, 0, desktop_thread, NtCurrentTeb()->driver_data,
+                                  0, &desktop_tid );
     if (!handle)
     {
         MESSAGE( "Could not create desktop thread\n" );

dlls/x11drv/x11drv_main.c

@@ -57,6 +57,7 @@ unsigned int screen_width;
 unsigned int screen_height;
 unsigned int screen_depth;
 Window root_window;
+DWORD desktop_tid = 0;
 int dxgrab, usedga, usexvidmode;
 int use_take_focus = 1;
 int managed_mode = 1;
@@ -439,6 +440,7 @@ struct x11drv_thread_data *x11drv_init_thread_data(void)
     data->cursor_window = None;
     data->last_focus = 0;
     NtCurrentTeb()->driver_data = data;
+    if (desktop_tid) AttachThreadInput( GetCurrentThreadId(), desktop_tid, TRUE );
     return data;
 }
 

include/x11drv.h

@@ -353,6 +353,7 @@ inline static Display *thread_display(void) { return x11drv_thread_data()->displ
 
 extern Visual *visual;
 extern Window root_window;
+extern DWORD desktop_tid;
 extern unsigned int screen_width;
 extern unsigned int screen_height;
 extern unsigned int screen_depth;