In Fedroa 41 I recently upgraded my monitor from 3840x1600 145hz to 5210x2160 resolution at 165hz, this is fine in Windows and fine in Wayland, however in x11 i get weird graphical glitches at the bottom of the screen. Primarily towards the bottom around where I have the taskbar. It mostly happens to dash to panel, but it has done it in the middle of the screen.
If I drop the frequency to 100hz this disappears. So of course I thought cable and bandwidth, so I bought an overkill cable and the same thing is happening. Again this does not occur in Windows(dual boot), or games on x11 or even a Wayland session, but Wayland is a world of issues in itself so I prefer to stick to x11.
Any help is appreciated.
Thanks
I took a video and created a couple gifs of the example in shotcut.