https://bugs.kde.org/show_bug.cgi?id=495957
Bug ID: 495957
Summary: Delay when displaying drawn in Xournаl++
Classification: Plasma
Product: kwin
Version: 6.1.5
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: input
Assignee: kwin-bugs-n...@kde.org
Reporter: konqi0...@gmail.com
CC: duha.b...@gmail.com
Target Milestone: ---
SUMMARY
When drawing or writing in Xournal++, there is a delay in drawing or writing
output
STEPS TO REPRODUCE
1. Select the pen tool
2. For better viewing Edit --> Preferences --> View --> Cursor icon for pen -->
Big pen icon
3. Using the stylus or the left mouse button, draw a line from left to right.
To make it more noticeable, it is worth doing it more sharply. Or you can try
writing.
OBSERVED RESULT
It becomes noticeable that the line that remains when drawing or writing text
appears with a delay after the pen movement.
EXPECTED RESULT
What is written or drawn should not be displayed with a delay. I would like it
to be smooth as when writing with a pen on paper.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Kubuntu 24.10
KDE Plasma Version: 6.1.5
KDE Frameworks Version: 6.6.0
Qt Version: 6.6.2
ADDITIONAL INFORMATION
This behavior is observed with Plasma 6. I use Kubuntu, but I did the test in
KDE Neon, which already has Plasma 6.2.3. In the live session, the behavior is
the same as described above.
For comparison, I downloaded a live session of Ubuntu 24.10 (Gnome, Wayland).
The described problems are not observed.
So, this is a bug in KDE (KWin) Wayland.
Thank you.
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