winex11: Detect broken NVIDIA RandR setups.

dlls/winex11.drv/xrandr.c

@@ -24,6 +24,7 @@
 #include "wine/debug.h"
 
 WINE_DEFAULT_DEBUG_CHANNEL(xrandr);
+WINE_DECLARE_DEBUG_CHANNEL(winediag);
 
 #ifdef SONAME_LIBXRANDR
 
@@ -419,6 +420,21 @@ static int xrandr12_init_modes(void)
         goto done;
     }
 
+    /* Recent (304.64, possibly earlier) versions of the nvidia driver only
+     * report a DFP's native mode through RandR 1.2 / 1.3. Standard DMT modes
+     * are only listed through RandR 1.0 / 1.1. This is completely useless,
+     * but NVIDIA considers this a feature, so it's unlikely to change. The
+     * best we can do is to fall back to RandR 1.0 and encourage users to
+     * consider more cooperative driver vendors when we detect such a
+     * configuration. */
+    if (output_info->nmode == 1 && XQueryExtension( gdi_display, "NV-CONTROL", &i, &j, &ret ))
+    {
+        ERR_(winediag)("Broken NVIDIA RandR detected, falling back to RandR 1.0. "
+                       "Please consider using the Nouveau driver instead.\n");
+        ret = -1;
+        goto done;
+    }
+
     if (!(xrandr12_modes = HeapAlloc( GetProcessHeap(), 0, sizeof(*xrandr12_modes) * output_info->nmode )))
     {
         ERR("Failed to allocate xrandr mode info array.\n");