https://bugs.kde.org/show_bug.cgi?id=520674
Bug ID: 520674
Summary: LibreOffice X11/XWayland Freeze and Severe Delays
After Screen Lock on Fedora KDE Wayland
Classification: I don't know
Product: kde
Version First unspecified
Reported In:
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
**ENVIRONMENT**
- OS: Fedora Linux 44
- Desktop Environment: KDE Plasma 6.6.5
- Server: Wayland
- Monitor: 4K display
- Fractional Scaling: 125%
- Suspend: disabled system-wide
- Hibernate: disabled system-wide
**BACKGROUND**
LibreOffice performance is extremely poor under native Wayland when fractional
scaling is enabled (known issue). To work around this, LibreOffice is forced to
run through X11/XWayland using either:
SAL_USE_VCLPLUGIN=qt6
QT_QPA_PLATFORM=xcb
or
SAL_USE_VCLPLUGIN=gtk3
GDK_BACKEND=x11
**ISSUE**
LibreOffice running through X11/XWayland becomes temporarily unusable after
screen lock or DPMS events on Fedora KDE Wayland with fractional scaling
enabled.
Observations:
- During the freeze, LibreOffice becomes completely unresponsive and cannot be
closed.
- The issue happens mostly after screen lock or monitor power-off/DPMS events.
- Logging out and back in temporarily fixes the problem.
- The issue affects both Qt6/XCB and GTK3/X11 backends.
- Qt6/XCB freezes for ~10 seconds when opening local files.
- GTK3/X11 freezes for ~10 seconds during startup before the menu bar appears
- The Flatpak version shows the same behavior.
- Has been reproduced on AMD and Nvidia GPU, Mesa can be ruled out
- Killing and restarting Xwayland does not help. It does not look like an
Xwayland issue.
- Has not been reproduced on GNOME
**THINGS ALREADY TESTED**
Multiple environment and rendering workarounds were tested without success,
suggesting a possible XWayland/KWin/Mesa interaction problem rather than a
LibreOffice-specific issue.
# Disable XWayland GLAMOR rendering
XWAYLAND_NO_GLAMOR=1
# Disable GTK portal integration
GTK_USE_PORTAL=0
# Disable DRI3
LIBGL_DRI3_DISABLE=1
# Disable synchronous printer detection
SAL_DISABLE_SYNCHRONOUS_PRINTER_DETECTION=1
# Force local GIO/VFS backend
GIO_USE_VFS=local
# Force local X11 display
DISPLAY=:0
# Remove old X11 session references
unset SESSION_MANAGER
unset WINDOWID
# Isolate LibreOffice from D-Bus session bus
unset DBUS_SESSION_BUS_ADDRESS
# Refresh NSS/DNS lookups
getent hosts "$(hostname)" >/dev/null 2>&1
**EXPECTED BEHAVIOR**
LibreOffice running through X11/XWayland should:
- remain responsive after screen lock and DPMS events
- open local files immediately
- display the UI without long freezes
**REPRODUCIBILITY**
The issue is intermittent but reproducible over time, especially after:
- screen locking
- monitor standby/DPMS events
A logout/login cycle reliably clears the issue temporarily.
This issure has also been reported here:
https://gitlab.freedesktop.org/groups/xorg/-/work_items?show=eyJpaWQiOiIxODk2IiwiZnVsbF9wYXRoIjoieG9yZy94c2VydmVyIiwiaWQiOjE1MTY5N30%3D
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