LSD screen working for a few seconds

[HaakonRuud]

I have a HP t740 thin client with windows 10 connected to a Samsung QM49H monitor. After a few seconds the monitor gives feedback that it doesn't have any signals. If I pull out the displayport cable and insert it again the monitor will work for a few seconds before it will give message no signal. I've tried to change the displayport cable and also tried to have a replicator between the thin client and the monitor, but at no help.

I've tried to update to the latest version of the graphic drivers, but that didn't help. I've actually tried this on two different t740 machines and none of them are working.

It works though if I use a DVI cable, but then I don't have the resolution I need.

I also have a HP t630 thin client that works perfectly fine with the same displayport cable and monitor mentioned above. So for sure I know that the cable and monitor are ok.

I'm running 3840 x 2160 resolution on 60Hz. Tried to change both resolution and frequenzy, but without any luck.

Someone have any idea of what the issue might be?
Thanks in advance!

[HaakonRuud · Accepted solution]

I got it to work by turning off HDCP support for this monitor in the AMD software.