GNOME Bugzilla – Bug 782035
Stylus Pressure Feel options have no effect
Last modified: 2021-07-05 13:49:07 UTC
The Wacom panel in Gnome Control Center provides both "Eraser Pressure Feel" and "Tip Pressure Feel" sliders for detected styluses. Moving the slider towards "Soft" should cause slight pressures to rapidly approach the 100%, while moving it towards "Hard" should cause even relatively large pressures to stay near 0%. It appears that these sliders do not actually have an effect, however. The keys at `/org/gnome/desktop/peripherals/stylus/$SERIAL` do appear to update properly in response to input from the sliders. However, when using `xinput watch-props` to monitor what happens with the Xorg device, no changes to the "Wacom Pressurecurve" property actually occur. Additionally, there is no observed change in the pressure value reported when the pen stands on its tip under its own weight (whereas a large change can be seen after using xsetwacom to set the curve to the values stored in dconf). System Info -------------- Arch Linux gnome-control-center 3.24.1-1 gnome-settings-daemon 3.24.1+7+g42f75ed4-1 mutter 3.24.1+1+geb394f19d-1 xf86-input-wacom 0.34.2-1 xorg-server 1.19.3-2 Xorg session
As the theory goes: 1) Clutter handles "Wacom Serial IDs" property changes, emits ClutterDeviceManager::tool-changed with the tool that just made proximity: https://git.gnome.org//browse/mutter/tree/clutter/clutter/x11/clutter-device-manager-xi2.c#n987 2) MetaInputSettings picks that up applies the stylus specific settings https://git.gnome.org//browse/mutter/tree/src/backends/meta-input-settings.c#n1401 3) The X11 MetaInputSettings impl applies the stylus pressure through the "Wacom Pressurecurve" property https://git.gnome.org//browse/mutter/tree/src/backends/x11/meta-input-settings-x11.c#n734 I didn't get to see yet why/where this breaks though...
GNOME is going to shut down bugzilla.gnome.org in favor of gitlab.gnome.org. As part of that, we are mass-closing older open tickets in bugzilla.gnome.org which have not seen updates for a longer time (resources are unfortunately quite limited so not every ticket can get handled). If you can still reproduce the situation described in this ticket in a recent and supported software version, then please follow https://wiki.gnome.org/GettingInTouch/BugReportingGuidelines and create a new ticket at https://gitlab.gnome.org/GNOME/mutter/-/issues/ Thank you for your understanding and your help.