user32: Trace ChangeDisplaySettingsExW() results.

Signed-off-by: Zhiyi Zhang <zzhang@codeweavers.com> Signed-off-by: Alexandre Julliard <julliard@winehq.org>

user32: Trace ChangeDisplaySettingsExW() results.
f7aefadd · Zhiyi Zhang · Alexandre Julliard · f8be6935 · f7aefadd
Commit f7aefadd authored Jul 21, 2020 by Zhiyi Zhang Committed by Alexandre Julliard Jul 21, 2020
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Showing with 11 additions and 2 deletions

sysparams.c dlls/user32/sysparams.c +11 -2

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--- a/dlls/user32/sysparams.c
+++ b/dlls/user32/sysparams.c
@@ -3310,12 +3310,18 @@ LONG WINAPI ChangeDisplaySettingsExW( LPCWSTR devname, LPDEVMODEW devmode, HWND 
    WCHAR primary_adapter[CCHDEVICENAME];
    BOOL def_mode = TRUE;
    DEVMODEW dm;
+    LONG ret;

    TRACE("%s %p %p %#x %p\n", debugstr_w(devname), devmode, hwnd, flags, lparam);
    TRACE("flags=%s\n", _CDS_flags(flags));

    if (!devname && !devmode)
-        return USER_Driver->pChangeDisplaySettingsEx(NULL, NULL, hwnd, flags, lparam);
+    {
+        ret = USER_Driver->pChangeDisplaySettingsEx(NULL, NULL, hwnd, flags, lparam);
+        if (ret != DISP_CHANGE_SUCCESSFUL)
+            ERR("Restoring all displays to their registry settings returned %d.\n", ret);
+        return ret;
+    }

    if (!devname && devmode)
    {
@@ -3359,7 +3365,10 @@ LONG WINAPI ChangeDisplaySettingsExW( LPCWSTR devname, LPDEVMODEW devmode, HWND 
        return DISP_CHANGE_BADMODE;
    }

-    return USER_Driver->pChangeDisplaySettingsEx(devname, devmode, hwnd, flags, lparam);
+    ret = USER_Driver->pChangeDisplaySettingsEx(devname, devmode, hwnd, flags, lparam);
+    if (ret != DISP_CHANGE_SUCCESSFUL)
+        ERR("Changing %s display settings returned %d.\n", wine_dbgstr_w(devname), ret);
+    return ret;
 }