I have issues with turning on HDR in Windows makes entire screen "washed out". Could be a windows thing though. HDR videos look great. Turning on LAD on desktop even in SDR actually look a bit similar to the washed out issue. So perhaps it's a matter of the screen needing to properly enable that only when HDR content is shown?
I also have noticed a strange issue where having Gsync enabled and running CSGO in 240Hz mode is silky smooth. The info of the screen shows its working. Then I alt-tab to desktop and back to the game and it claims to be running 240Hz, the game has high framerate but everything feels sluggish. Looking at the info screen of the monitor then shows it stuck at 60Hz. Turning it off and back on an everything is back to being silky smooth again.
So a few kinds for Samsun, and perhaps MS and Nvidia too, to fix.
For in SDR most of the time it's working fine for me. I have not had any flickering, lines or anything like that.
But I wanted to get a good HDR experience so I'm hoping Samsung responds and have a plan ASAP or I might return it. Sure its a great monitor (when it works) even in SDR at 240Hz... But for the price everything should work.
For context I'm running a 3080Ti Suprim X and came from two 27" 16:9 monitors.