https://bugs.kde.org/show_bug.cgi?id=511542
Bug ID: 511542
Summary: [HUION] Drawing on the canvas slows down significantly
with Huion Inspiroy H640P
Classification: Applications
Product: kolourpaint
Version First 25.08.2
Reported In:
Platform: Mint (Ubuntu based)
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
Drawing on the canvas slows down significantly with Huion Inspiroy H640P. This
does not occur for the first handful of brush strokes, but over time the
pointer, regardless of what tool is selected, slows down significantly and
drifts all over the canvas, to the point of unusability. This happens even with
the Huion driver program closed, but this does not happen with the mouse. As
well, this happens regardless of how much load is on the CPU and memory, so it
does not seem to be performance related.
STEPS TO REPRODUCE
1. Open KolourPaint with the Huion Inspiroy H640P connected
2. Select any brush
3. Draw on the canvas for a few dozen brush strokes until pointer becomes slow
and laggy
Note: This bug occurs most reliably in slightly larger canvas sizes, 1000x1000
or higher. Replication is most consistent at 1200x1200 (my canvas sizes are
usually higher than 1000x1000)
OBSERVED RESULT
Pointer gradually becomes slower and slower until it takes several seconds for
it to move from one side of the canvas to the other.
EXPECTED RESULT
Pointer should be smooth and lag-free.
SOLUTIONS TRIED
- Restart KolourPaint (only resets the bug)
- Reinstall KolourPaint
- Reinstall Huion drivers
- Draw without drivers enabled (raw input)
- Draw with all other programs closed
- Draw with smaller canvas sizes (this does fix the issue somewhat, becomes
more reliable of a fix the smaller the canvas. However, I regularly draw at
canvas sizes 1000x1000 or larger, so this is not a good solution for me)
ADDITIONAL NOTES
- This is a problem that has gotten worse over time. It was rare when I first
installed and used KolourPaint, now it is consistent and unavoidable.
- The pointer does not slow down when on the toolbars, this bug is restricted
purely to the canvas.
SOFTWARE/OS VERSIONS
KolourPaint version: 25.08.2 (both repo and Flatpak versions were tested)
OS: Linux Mint 22.2 x86_64
DE: Cinnamon 6.4.8
Kernel: 6.14.0-34-generic
Shell: bash 5.2.21
Resolution: 1920x1080
HARDWARE
Device: Aspire A515-55 V1.13
Mouse: Razer DeathAdder Essential
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