External monitor waking up often

by viraptor   Last Updated February 11, 2019 10:12 AM

I'm using a MacBook Pro 2016 with touchbar running High Sierra. I've got an external display connected over HDMI to a usb-c dongle (Apple's).

When I put the laptop to sleep, the monitor continuously cycles between waking up, displaying "no signal" view, and sleeping for a few seconds.

What's the best way to debug/fix it?

Tags : display

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