** Description changed:
- Same issue here, and I think it's the mutter regression already linked in
#5852: https://gitlab.gnome.org/GNOME/mutter/-/work_items/4803 (fixed by mutter
MR !5126, released in mutter 50.3).
- ▎
- ▎ Setup: Ubuntu 26.04.1, GNOME 50.1 on Wayland, mutter 50.1-0ubuntu2.4, Wacom
Intuos S (CTL-4100).
- ▎
- ▎ - Reproduced with Xournal++ 1.3.7+dev (PPA nightly) and 1.3.8 (Flathub
stable). The pen works in a normal or maximized window. In fullscreen it
reliably stops working once the pen is held away from the tablet for about 3
seconds. Picking a tool from a toolbar dropdown triggers it too. The mouse
keeps working.
- ▎ - In a WAYLAND_DEBUG log, zwp_tablet_tool_v2 events
(proximity_in/motion/down) arrive normally at the main surface in fullscreen
until the freeze. After a proximity_out, only wl_pointer events reach the
window. So the problem is on the compositor side, not in Xournal++'s input
handling.
- ▎ - Running with GDK_BACKEND=x11 (XWayland) doesn't help: there the pen moves
the cursor but can't click or draw at all.
- ▎
- ▎ Workaround until distros ship mutter ≥ 50.3: use a maximized window instead
of fullscreen. Ubuntu 26.10 (mutter 51) is reported as fixed.
+ [ Impact ]
+
+ Setup: Ubuntu 26.04.1, GNOME 50.1 on Wayland, mutter 50.1-0ubuntu2.4,
+ Wacom Intuos S (CTL-4100).
+
+ The pen works in a normal or maximized window. In fullscreen it reliably
+ stops working once the pen is held away from the tablet for about 3
+ seconds. Picking a tool from a toolbar dropdown triggers it too. The
+ mouse keeps working.
+
+ In a WAYLAND_DEBUG log, zwp_tablet_tool_v2 events
+ (proximity_in/motion/down) arrive normally at the main surface in
+ fullscreen until the freeze. After a proximity_out, only wl_pointer
+ events reach the window. So the problem is on the compositor side, not
+ in Xournal++'s input handling.
+
+ This was reported upstream at
+ https://gitlab.gnome.org/GNOME/mutter/-/work_items/4803, and fixed by
+ mutter MR !5126, released in mutter 50.3.
+
+ [ Test Plan ]
+
+ 1. Open Xournal++
+ 2. Make the window Fullscreen, for example with the F11 key.
+ 3. Draw with a stylus device
+ 4. Verify that you can draw
+ 5. Lift the stylus for a few seconds
+ 6. Verify that the cursor disappeared
+ 7. Draw again with the same stylus
+ 8. Verify that the cursor reappeared, and that you can still draw
+
+ [ Where problems could occur ]
+
+ Problems would manifest with stylus input devices in the GNOME desktop.
+ In the worst case, the desktop may crash and forcefully log-out the user.
+
+ [ Other info ]
+
+ Workaround: use a maximized window instead of fullscreen. Ubuntu 26.10
+ (mutter 51) is reported as fixed.
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: mutter (not installed)
ProcVersionSignature: Ubuntu 7.0.0-34.34-generic 7.0.14
Uname: Linux 7.0.0-34-generic x86_64
NonfreeKernelModules: zfs
ApportVersion: 2.34.1-0ubuntu0.1
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Mon Oct 5 08:42:27 2026
InstallationDate: Installed on 2026-04-28 (160 days ago)
InstallationMedia: Ubuntu 26.04 "Resolute Raccoon" - Release amd64
(20260423.1)
SourcePackage: mutter
UpgradeStatus: No upgrade log present (probably fresh install)
** Changed in: mutter (Ubuntu Resolute)
Status: Triaged => In Progress
** Changed in: mutter (Ubuntu Resolute)
Assignee: (unassigned) => Alessandro Astone (aleasto)
** Description changed:
[ Impact ]
Setup: Ubuntu 26.04.1, GNOME 50.1 on Wayland, mutter 50.1-0ubuntu2.4,
Wacom Intuos S (CTL-4100).
The pen works in a normal or maximized window. In fullscreen it reliably
stops working once the pen is held away from the tablet for about 3
seconds. Picking a tool from a toolbar dropdown triggers it too. The
mouse keeps working.
In a WAYLAND_DEBUG log, zwp_tablet_tool_v2 events
(proximity_in/motion/down) arrive normally at the main surface in
fullscreen until the freeze. After a proximity_out, only wl_pointer
events reach the window. So the problem is on the compositor side, not
in Xournal++'s input handling.
This was reported upstream at
https://gitlab.gnome.org/GNOME/mutter/-/work_items/4803, and fixed by
mutter MR !5126, released in mutter 50.3.
[ Test Plan ]
+ 0. Log-in to Ubuntu Desktop
1. Open Xournal++
2. Make the window Fullscreen, for example with the F11 key.
3. Draw with a stylus device
4. Verify that you can draw
5. Lift the stylus for a few seconds
6. Verify that the cursor disappeared
7. Draw again with the same stylus
8. Verify that the cursor reappeared, and that you can still draw
[ Where problems could occur ]
Problems would manifest with stylus input devices in the GNOME desktop.
In the worst case, the desktop may crash and forcefully log-out the user.
[ Other info ]
Workaround: use a maximized window instead of fullscreen. Ubuntu 26.10
(mutter 51) is reported as fixed.
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: mutter (not installed)
ProcVersionSignature: Ubuntu 7.0.0-34.34-generic 7.0.14
Uname: Linux 7.0.0-34-generic x86_64
NonfreeKernelModules: zfs
ApportVersion: 2.34.1-0ubuntu0.1
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Mon Oct 5 08:42:27 2026
InstallationDate: Installed on 2026-04-28 (160 days ago)
InstallationMedia: Ubuntu 26.04 "Resolute Raccoon" - Release amd64
(20260423.1)
SourcePackage: mutter
UpgradeStatus: No upgrade log present (probably fresh install)
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https://bugs.launchpad.net/bugs/2169577
Title:
wacon intuos stop working in xournalpp
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