diff -Nur a/src/radeon_kms.c b/src/radeon_kms.c
--- a/src/radeon_kms.c	2015-11-12 02:57:33.000000000 +0000
+++ b/src/radeon_kms.c	2015-12-28 16:50:05.403313307 +0000
@@ -1630,7 +1630,7 @@
     }
 #endif
 
-    value = FALSE;
+    value = TRUE;
     from = X_DEFAULT;
     if (xf86GetOptValBool(info->Options, OPTION_DRI3, &value))
 	from = X_CONFIG;