Mouse cursor size issues with fractional scaling

[paranoidi]

Distribution

Mint 22.2 (and 22.3 beta)

Package version

Cinnamon 6.6.3

Graphics hardware in use

Nvidia RTX 2070 super

Frequency

Always

Bug description

Since upgrading to 4K display and having to rely on fractional scaling I have noticed random mouse cursor scaling issues. This was quite infrequent and happened consistently only with FreeCAD when screensaver was triggered. However the latest FreeCAD 1.1rc2 this happens immediately and always. Easy to reproduce. It does happen with other applications as well.

I did try wayland session quickly and there were no cursor scaling issues (other issues though which are not relevant here). Since wayland is still years away from being the default this should be fixed on X11.

Here is a video demonstrating the issue:

cinnamon-2026-01-08_07.21.11.mp4

Steps to reproduce

Download FreeCAD_1.1rc2-Linux-x86_64-py311.AppImage from https://github.com/FreeCAD/FreeCAD/releases and run it.

Expected behavior

Mouse cursor should remain approximately the same size. Ideally exactly the same, but sadly it seems like that is not feasible for reasons beyond me.

Additional information

No response