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RX560 + High Sierra: HDMI sometimes stops working after a bit

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Feb 18, 2022
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Motherboard
Gigabyte GZ-Z270X Ultra Gaming
CPU
i7-7700K
Graphics
RX 560
I have two monitors connected to my RX560: a 5k on the displayport (primary) and a 4k on the HDMI. Rather than putting my machine to sleep, I will often use a "Sleep Displays" command at the end of the day. Unfortunately, sometimes the 2nd display, connected to HDMI, just never comes back. I can tell because I also sometimes use remote desktop to connect to the machine and the 2nd display will stop showing up there as well.

Unplugging and plugging the monitor back in does not fix the situation - the only thing I can do is reboot. Are there any settings I can enable to make the 2nd monitor more reliable?
 
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