Beacon to emit when a display is available to a linux machine
New in version 2016.3.0.
Emit the status of a connected display to the minion
Mainly this is used to detect when the display fails to connect for whatever reason.
beacons: glxinfo: - user: frank - screen_event: True
Validate the beacon configuration
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https://docs.saltstack.com/en/latest/ref/beacons/all/salt.beacons.glxinfo.html