Created attachment 122860 [details] evemu-record of a tablet device with a mouse resting over it Just having one of these tools resting on a tablet makes libinput report many sub-pixel motions: event13 TABLET_TOOL_AXIS +2.84s 129.06/129.06* distance: -0.27 rotation: 355.00* wheel: 0.00 (0) event13 TABLET_TOOL_AXIS +2.85s 129.06/129.06* distance: -0.27 rotation: 355.00 wheel: 0.00 (0) event13 TABLET_TOOL_AXIS +2.86s 129.06/129.06 distance: -0.27 rotation: 352.14* wheel: 0.00 (0) event13 TABLET_TOOL_AXIS +2.89s 129.07*/129.07 distance: -0.27 rotation: 352.14 wheel: 0.00 (0) event13 TABLET_TOOL_AXIS +2.91s 129.07/129.07* distance: -0.27 rotation: 352.14 wheel: 0.00 (0) event13 TABLET_TOOL_AXIS +2.93s 129.07/129.07* distance: -0.27 rotation: 352.14 wheel: 0.00 (0) event13 TABLET_TOOL_AXIS +2.93s 129.06*/129.06 distance: -0.27 rotation: 352.14 wheel: 0.00 (0) Probably some noise reduction would be convenient here.
https://lists.freedesktop.org/archives/wayland-devel/2016-April/028015.html
commit 60a8ba9f3e3210a2dceabc834af9a140f548c1af Author: Peter Hutterer <peter.hutterer@who-t.net> Date: Tue Apr 12 08:36:48 2016 +1000 tablet: add a fuzz-filter to avoid spamming callers with subpixel updates
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