--- xorg-server-1.19.3/hw/xfree86/drivers/modesetting/drmmode_display.c.old	2017-05-31 14:59:44.683911153 +0300
+++ xorg-server-1.19.3/hw/xfree86/drivers/modesetting/drmmode_display.c	2017-05-31 15:00:53.354710517 +0300
@@ -1275,6 +1275,8 @@ drmmode_output_add_gtf_modes(xf86OutputP
     int max_x = 0, max_y = 0;
     float max_vrefresh = 0.0;
 
+    return Modes;
+
     if (mon && GTF_SUPPORTED(mon->features.msc))
         return Modes;