grahamlthompson - 17 mins ago »
Try this.
Change the HDMI resolution to Auto. Further down Select Dynamic Refresh Rate Switching. Change the setting to Custom. Change 1080 for live TV to on
I've tried that, well sort of, I've set it to high which does the same setting.
Hasn't cut off yet on the new port, I'll update if it changes again, hard to test with being at work.