I stuck with the cable I was using as Rasmus said it was 1.4 and probably not that.
I'll unplug my vr and try a hdmi cable. Its tough to track down as it occurs so randomly
Thanks
Just been trying to make it happen both races where it was happening yesterday no problem today aaargh! I've got some bits to order from amazon this week so I'll get the cable Rasmus recommends
Checked the cable links again and I have to say your's might not be true dp 1.4.
The description says 4k 60 fps but my link to the kabel direkt 1.4 cable states 4k 120 fps which would be doubled the bandwidth...
Try to run your monitor with hdmi. Hdmi is more sensitive in my experience than dp so if the screen doesn't go black with it, it's your dp cable.
If the screen goes black with hdmi too, it might be your dp cable or a power related problem...
When I shut off my audio receiver, my TV goes blank for a tenth of a second when connected to my pc.
Absolutely no idea why but it wasn't there in my old apartment...
Also some sensitive led bulbs are flickering when I switch on my Audio receiver..
This apartment has some electricity issues. Nothing major but it might be similar with your black screen issues.
Maybe use a different wall socket for your monitor to test it?
Anyway back about cables: it might also be that it's the cable no matter the dp standard. With my monitor, some dp 1.2 cables work fine and so don't. No idea why but apparently there's some cable voodoo involved.
Getting the Kabel direkt do 1.4 4k 120 fps cable should 100% remove the cable from the list of possible reasons though