Vanilla Ubuntu 20.04, Gnome, X server, RTX 2070 Super GPU, driver version 495.
Laptop screen: 17 inch 3840x2160, 200% scaling
Dual external screens: 27 inch 3840x2160, 150% scaling
No issues with the above. I only have 4K screens, so I haven't tested this with different resolutions, but at the very least different scaling does work.
Laptop screen: 17 inch 3840x2160, 200% scaling
Dual external screens: 27 inch 3840x2160, 150% scaling
No issues with the above. I only have 4K screens, so I haven't tested this with different resolutions, but at the very least different scaling does work.