Hello,
I have two Acer Predator X27P that support Gsync Ultimate; they are both connected through DP.
The problem is that the drivers don’t recognize them as supporting Gsync:
I am using Nvidia drivers 465.31, KDE 5.21.5, and kernel 5.11.20 (but the problem existed on all the past versions of all 3).
For the moment I am using the workaround of enabling “Allow G-SYNC on monitor validated as G-Sync compatible”, but it is annoying (as I have to re-enable it every time I boot).
Best regards.