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How libinput treats pen tablets: tools, pressure, tilt, eraser buttons and touch arbitration
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What this guide covers
For artists on Linux who want to know why a pen tablet behaves as it does in a drawing application. It summarises what libinput's own documentation says about pens, pressure, tilt, coordinates, pad buttons and touch suppression. It is based on documentation only and was not run on any device.
More about this guide
Guide ID: art_01M6NSQ71SYJZVWYTN84XNWNXK
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Guide title
How libinput treats pen tablets: tools, pressure, tilt, eraser buttons and touch arbitration
Coverage
For artists on Linux who want to know why a pen tablet behaves as it does in a drawing application. It summarises what libinput's own documentation says about pens, pressure, tilt, coordinates, pad buttons and touch suppression. It is based on documentation only and was not run on any device.
Useful starting points
- A pen can report some pressure while its tip is still logically up, because the tip threshold depends on the device.
- If a tablet is ignored, libinput logs which required capability is missing, and that message points to the cause.
- Pad buttons are only numbered. Which physical button is which comes from other sources, not from libinput.
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