--- libcrystalhd-20120405/driver/linux/20-crystalhd.rules	2011-03-14 22:02:54.000000000 +0200
+++ libcrystalhd-20120405/driver/linux/20-crystalhd.rules	2015-04-07 22:32:59.895039578 +0300
@@ -1 +1 @@
-KERNEL=="crystalhd", MODE="0666"
+KERNEL=="crystalhd", MODE="0660", GROUP="video"