I just installed 21.04 to see if it can handle my display layout better than 20.10. I had issues with the displays not understanding their borders when rendering menus or maximizing windows. This works great on 21.04, but fractional scaling does not work properly.
I'd like to use 125% scaling, but when I try to set it it, all UI elements and windows extender outside of the actual display they are on. I cannot take a screenshot as the "do you accept these changes" dialog box is rendered outside as well (you can just see the edge of it) and I cannot click it.
If I set all displays to use 125% instead of just the 4K main display, then the issue is worse - that is windows and UI elements are scaled even further away from top left corner of the main 4K display. Using 100% or 200% scaling works perfectly. My goal was to use 125% on all 3 displays.
I assume this is caused by the display layout I use, but if someone has a workaround suggestion I'd appreciate it. See screenshot below:
There is one 4K display and two 1440p displays. I am using Dell XPS 15 with the TB16 Thunderbolt dock. Overall this works far better than on 20.10 - there are no issues with hot plugging and Ubuntu is remembering the separate settings for the laptop's built in display when it is not docked.
All packages are at their defaults and at latest version.
I am using nvidia-driver-460.
