Weird artefact when writing using a stylus

[astro-ray]

Describe the bug If you use a stylus on a touchscreen laptop and write any letter with a vertical line or draw a freehand vertical line, and if the line is not perfectly vertical, then an artefact will appear as a dotted vertical line

To Reproduce Steps to reproduce the behaviour:

1. Open Rnote
2. Change the pressure curve to quadratic parabola and stroke weight to 2.00
3. Draw a vertical line using a stylus on a touchscreen laptop
4. You will find a perfectly vertical dashed line alongside the line you have drawn

Expected behaviour Just touch input should appear when I write or draw; nothing else

Console Output Run with flatpak run com.github.flxzt.rnote and post the output here I am not getting any console output with this command.

Screenshots

Desktop (please complete the following information):

• OS: Ubuntu 22.04.1 LTS x86_64
• Version: 22.04.1 LTS
• Installation source: Flatpak
• Desktop Environment: Gnome 42.4
• Device: Dell Inspiron 7451 2-in-1

Additional context Rnote version: 0.5.5

EDIT: The artefact is more prominent in certain zoom

[astro-ray]

Console Output It's for version 0.5.6

[Heiseneberg-maybe]

I was able to reproduce this with X11 but not with Wayland, what are you using? It appears with the solid and the marker options but I wasn't able to reproduce it with the textured option. Can you try switching to the other one?

[astro-ray]

I am on Wayland. For me, I have only noticed it with the marker option only.

[K4LCIFER]

I have this issue as well.

• OS: Arch Linux, Kernel v6.5.9-arch2-1
• DE: KDE Plasma v5.27.9 (Wayland)
• Rnote v0.9.0 (Flatpak)

[OmegaRogue]

I have this issue aswell

• OS: Fedora 38, 6.2.15-1.surface.fc38.x86_64
• DE: GNOME 44.1 (Wayland)
• Rnote v0.9.1 (Flatpak) Pressure curve: linear Also occurs on shapes