https://bugs.kde.org/show_bug.cgi?id=475619
Bug ID: 475619
Summary: Straight lines at the beginnings of strokes with a
Wacom Intuos on Plasma Wayland
Classification: Plasma
Product: kwin
Version: 5.27.8
Platform: Archlinux
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: libinput
Assignee: kwin-bugs-n...@kde.org
Reporter: windboun...@protonmail.com
Target Milestone: ---
Created attachment 162304
--> https://bugs.kde.org/attachment.cgi?id=162304&action=edit
A screenshot showing brush strokes in Krita that all start with a straight
line.
SUMMARY
When I draw with my Wacom Intuos CTH-690, the beginning of every brush stroke
is a straight line. I tried it in Krita, Aseprite, Blender and the GNU Image
Manipulation Program. It only happens in the Wayland session of Plasma, not on
X11 and also not on GNOME Wayland.
STEPS TO REPRODUCE
1. Start a Plasma Wayland session
2. Open any drawing application like Krita
3. Using the Wacom Intuos, make any brush stroke on the canvas, for example
drawing a circle
OBSERVED RESULT
The beginning of the stroke is straight as seen in the attached screenshot
EXPECTED RESULT
The drawn brush stroke should reflect the entire movement that was done with
the pen, for example a full circle, instead of seemingly ignoring inputs for a
bit after the pen touches the tablet
SOFTWARE/OS VERSIONS
KDE Plasma Version: 5.27.8
KDE Frameworks Version: 5.110.0
Qt Version: 5.15.11
Kernel Version: 6.5.7-arch1-1
ADDITIONAL INFORMATION
I tried Plasma X11/Wayland and GNOME X11/Wayland on Arch, Debian 12.2.0 and
Ubuntu 22.04.3, and this issue only happens on Plasma Wayland and on any
distro. Drawing in the Krita Tablet Tester on Plasma Wayland however does
produce perfect strokes that don’t have a straight line at the beginning.
See also my thread at
https://krita-artists.org/t/wacom-intuos-analysis-of-straight-lines-at-the-beginnings-or-ends-of-strokes/75702
where someone using a Wacom Intuos Pro M reported experiencing the same issue.
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