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user32: Wait for graphics driver to be ready in EnumDisplayDevicesW. 

It's possible that EnumDisplayDevicesW gets called before graphics driver is loaded.

Signed-off-by: Zhiyi Zhang <zzhang@codeweavers.com>
Signed-off-by: Huw Davies <huw@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Zhiyi Zhang 2019-08-14 16:21:06 +08:00 committed by Alexandre Julliard
parent ed6aa17d98
commit 8f45d9a991
1 changed files with 13 additions and 0 deletions
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13
dlls/user32/sysparams.c
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@ -736,6 +736,18 @@ static void release_display_device_init_mutex( HANDLE mutex )
CloseHandle( mutex );
}
/* Wait until graphics driver is loaded by explorer */
static void wait_graphics_driver_ready(void)
{
static BOOL ready = FALSE;
if (!ready)
{
SendMessageW( GetDesktopWindow(), WM_NULL, 0, 0 );
ready = TRUE;
}
}
/* map value from system dpi to standard 96 dpi for storing in the registry */
static int map_from_system_dpi( int val )
{
@ -4048,6 +4060,7 @@ BOOL WINAPI EnumDisplayDevicesW( LPCWSTR device, DWORD index, DISPLAY_DEVICEW *i
TRACE("%s %d %p %#x\n", debugstr_w( device ), index, info, flags);
wait_graphics_driver_ready();
mutex = get_display_device_init_mutex();
/* Find adapter */