https://bugs.kde.org/show_bug.cgi?id=499979
Bug ID: 499979
Summary: [Wacom Tablet] Wayland + Dual tablet setup result in
wrong pressure reading in one of the tablet (Plasma
6.3)
Classification: I don't know
Product: kde
Version: unspecified
Platform: openSUSE
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: unassigned-b...@kde.org
Reporter: ss93...@gmail.com
Target Milestone: ---
Created attachment 178267
--> https://bugs.kde.org/attachment.cgi?id=178267&action=edit
Output from tablet tester
SUMMARY
I have two wacom tablet device connected, `Intous pro L (PTH-851)` and `Cintiq
13 pro (DTH-1320)`.
If login under Wayland and pickup the first device, the pressure reading
respond my stylus pressure well, but the second device would give me the wrong
pressure reading and make it unusable (too little or too strong to draw).
Use the **same** stylus for testing.
For example:
First pickup Intous pro L and draw --> OK
Next pickup Cintiq 13 pro --> Pressure easily reach 100% even I just lightly
press down the stylus
--- logout and login reset the behavior ---
First Cintiq 13 pro --> pressure reading OK
Next Intous pro L --> Pressure hardly get over 18% even with a heavy press.
Pressure reading tool: Tablet Tester in Krita
The issue doesn't appear if switching to x11.
The issue has presented in Plasma 6.2 (when I first switch to Wayland)
OBSERVED RESULT
the pressure reading get wrong depending on use order of the device.
EXPECTED RESULT
Pressure reading should be similar between two device and also x11
SOFTWARE/OS VERSIONS
Operating System: openSUSE Tumbleweed 20250211
KDE Plasma Version: 6.3.0
KDE Frameworks Version: 6.10.0
Qt Version: 6.8.2
Kernel Version: 6.13.1-1-default (64-bit)
Graphics Platform: Wayland
ADDITIONAL INFORMATION
Intous pro L (PTH-851) hardware support up to 2048 pressure level
Cintiq 13 pro (DTH-1320) hardware support up to 8192 pressure level
Stylus is paired with PTH-851 which only support 2048 level
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