I use Ubuntu 20.04.1 LTS on a dual-monitor setup. These are the relevant components of my PC:
CPU: AMD Ryzen 7 3700X 3.6GHz
Motherboard: Asus TUF GAMING X570-PLUS
Memory: Corsair Vengeance LPX 16GB (2 x 8GB) DDR4-3200
Storage: Samsung 850 EVO-Series 500GB 2.5" SSD
Storage: Crucial P1 1 TB M.2-2280 NVME SSD
Video Card: Gigabyte Radeon RX 5700 XT 8GB
Power Supply: SeaSonic EVO 620W
Monitor: AOC G2460PF 24.0" 1920x1080 144Hz
Monitor: AOC 23.6" WIDESCREEN - 1920 x 1080 60Hz
I am experiencing screen flicking in the top left hand side of certain apps, such as Chrome and Slack, particularly when moving my mouse or using the keyboard. This is always in the top left hand corner of the app, but otherwise is quite inconsistent. It seems to happen more on the cheaper 23.6" AOC monitor, but that could be a red herring as it does happen on both. I've uploaded a brief video of this happening to show you what I mean here. I have a separate Windows partition where I don't experience this issue, so I am convinced that it is not a hardware issue, but something to do with Ubuntu.
After some searching online I can see quite a few people have had similar issues with various versions of Ubuntu, but nothing that was exactly this. I am new to Ubuntu and am cautious about typing things into the terminal that I don't really understand and that might not be relevant to what I'm seeing here, so am keen to get some advice that is bespoke to my issue before troubleshooting any further. Any advice is much appreciated.
