If I run MEMTEST Pro from a flash boot drive to test all of memory, I turned off the monitor since it will run for many hours.
However, that disables displayport.
When I turn the monitor back on, the display is still off because the test is not set up to re-enable the port.

I could, of course, not turn off the display, which I will in the future, but I'm wondering if there is some setting that will prevent the port from turning itself off?

Is it some power setting somewhere?

The parts are:
ASUS ROG STRIX GeForce GTX 1080 TI 11GB
ASUS ROG Swift PG348Q 3440x1440 monitor