[BUG] Affinity V3 cursor offset on GNOME with display scaling, Fedora 43

[AbsoluteVendingMachine]

Does an issue for this already exist?

• I have searched the existing issues
• I have ensured my environment (operating system, app launcher, etc) is up to date

Operating System and Version

Fedora 43

Launcher

Lutris (Recommended)

Launcher Installation

Flatpak (Recommended)

Other Install

I have also tried to fix this with other install methods (i.e. Bottles and new wine 11 method but they didn't fix it)

Wine Version

ElementalWarrior (Recommended)

Affinity Version

3.x

Desktop Environment

GNOME

Description

When using any drawing tool with the tablet, the cursor will be visually offset from what you actually draw. On GNOME, the issue seems to be tied to the Scale, as switching from 200% -> 100% fixes the issue, regardless of wine prefix DPI.

Steps to reproduce

1. Follow the recommended Lutris install method for Affinity (or your preference of installation method) on Fedora 43 GNOME.
2. Set the display scaling to more than 100% (i.e. through GNOME Settings).
3. Open Affinity and create a new project.
4. Select any brush tool and draw on the canvas.

Expected behaviour

The drawing should have no offset from the cursor.

Screenshots

https://www.youtube.com/watch?v=1YAfxfVWKW4

Logs

N/A

Config

I saw from some other posts that the Affinity V3 Plugin Loader fixed the issue, but it wasn't able to fix it on my install.

Self-service

• I'd be willing to fix this issue myself.

[Gamedirection]

We've confirmed a related bug on KDE (KWin's XWayland scaling handling breaks at certain fractional scale factors, see General Known Issues), but GNOME uses a completely different compositor (Mutter), so we can't assume the same root cause applies here, and we haven't confirmed one for GNOME specifically yet.

Since 100% scaling fixes it for you, that at least confirms it's scaling-related rather than something else. If you're able to test at a scale that isn't a round percentage break point (say 150% instead of 200%) and see if the offset amount changes proportionally, that would help tell us whether this is the same class of bug as the KDE one (a scale-factor rounding issue) or something GNOME-specific in cursor hotspot handling. Keeping this open as unconfirmed.

[AbsoluteVendingMachine]

Thanks for responding, after further testing, something really strange happened, the issue completely resolved at all scalings with GNOME. Since then, I have updated to Fedora 44 (which did update GNOME), but I'm not sure what could have fixed it. In my past experience though, the offset amount did change proportionally with scaling on Fedora 43.