Public bug reported:
== Summary ==
After upgrading from Ubuntu 25.10 to 26.04 (Mutter 49 → 50), pen/stylus
clicks from a Wacom Cintiq 16 no longer work in XWayland applications.
Cursor movement works correctly, but pen tip press (BTN_TOUCH) is not
forwarded as a click event to XWayland apps.
This is the same regression that occurred in Ubuntu 23.10 (Mutter 45)
and was fixed in Mutter 45.2 (see bug #2043027).
== Affected applications (XWayland) ==
- Krita 6.0.1 AppImage
- Godot Engine 4.x AppImage
- Any XWayland application
== Working applications (native Wayland) ==
- Google Chrome
- GNOME Files, GNOME Settings
- All GTK4 / native Wayland apps
== Steps to reproduce ==
1. Connect Wacom Cintiq 16 (USB ID: 056a:03e6) to Ubuntu 26.04
2. Open any XWayland application (e.g. Krita AppImage)
3. Move pen over the window → cursor follows correctly ✓
4. Press pen tip to screen → no click event received ✗
(Even the window title bar does not respond to pen clicks)
== Expected behavior ==
Pen tip press registers as a click in XWayland apps.
This worked correctly in Ubuntu 25.10 / Mutter 49.
== Actual behavior ==
Cursor movement works, but BTN_TOUCH produces no click event in any
XWayland app.
== Environment ==
- Ubuntu 26.04
- Mutter 50.1-0ubuntu2
- libinput 1.31.1
- GNOME Shell 50.1
- Wacom Cintiq 16 DTK168 (USB ID: 056a:03e6)
- 3-monitor setup (2x Dell DP, 1x Cintiq via USB-C as connector None-2)
== Related ==
- Previous identical regression:
https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/2043027 (fixed in Mutter
45.2)
- Upstream: https://gitlab.gnome.org/GNOME/mutter/-/issues/3714
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: mutter (not installed)
ProcVersionSignature: Ubuntu 7.0.0-15.15-generic 7.0.0
Uname: Linux 7.0.0-15-generic x86_64
ApportVersion: 2.34.0-0ubuntu2
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Sun May 24 09:42:20 2026
InstallationDate: Installed on 2025-06-02 (356 days ago)
InstallationMedia: Ubuntu 25.04 "Plucky Puffin" - Release amd64 (20250415.3)
SourcePackage: mutter
UpgradeStatus: Upgraded to resolute on 2026-05-23 (1 days ago)
** Affects: mutter (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug resolute wayland-session
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https://bugs.launchpad.net/bugs/2154107
Title:
Wacom tablet pen clicks not working in XWayland apps after upgrade to
Ubuntu 26.04 (Mutter 50 regression)
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