# color measurement devices
ENV{COLOR_MEASUREMENT_DEVICE}=="*?", TAG+="udev-acl"
+# DDC/CI device, usually high-end monitors such as the DreamColor
+ENV{DDC_DEVICE}=="*?", TAG+="udev-acl"
+
# apply ACL for all locally logged in users
LABEL="acl_apply", TAG=="udev-acl", TEST=="/var/run/ConsoleKit/database", \
RUN+="udev-acl --action=$env{ACTION} --device=$env{DEVNAME}"