Plasma/Wayland Known Significant Issues: Difference between revisions

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This page tracks the Wayland showstoppers throughout the stack.
This page tracks the "Errata/Known issues" that are specific to the the Plasma Wayland session: significant quality-of-life annoyances, significant problems with workarounds, etc. This is part of KDE's [[Goals/Wayland|Wayland goal]].


== KWin/compositing/window management ==
It is the Wayland-specific companion to [[Plasma/X11 Known Significant Issues]].
No vertical / horizontal maximize of Wayland native clients. KWin uses NetWM modes internally to do this. Works with Xwayland clients. Would also work for Wayland clients, just the state cannot be exported to Wayland (c.f. Quick tiling).


Task Switchers are sometimes black and unusable: https://bugs.kde.org/show_bug.cgi?id=415798


XWayland windows are upscaled and look blurry and ugly in HiDPI mode: https://bugs.kde.org/show_bug.cgi?id=389191
== Session management ==
* No session restore for native Wayland windows: https://bugs.kde.org/show_bug.cgi?id=436318. Our session management recovery engine is based on the [https://www.x.org/releases/X11R7.7/doc/libSM/xsmp.html X Session Management Protocol] and there is apparently currently no generic concept to do it on Wayland. But on Qt it's plugin-able and [https://wiki.gnome.org/Projects/SessionManagement/GnomeSession GNOME has had their own implementation] for some time.
* Session-restored XWayland windows go on the wrong screens and virtual desktops: https://bugs.kde.org/show_bug.cgi?id=468252 + https://bugs.kde.org/show_bug.cgi?id=421870


Cursor lags under high CPU load: https://bugs.kde.org/show_bug.cgi?id=421131
== KWin/compositing/window management ==
* When the compositor crashes or restarts, non-Qt apps are killed — Qt apps do stay alive, and work is ongoing to make other apps survive as well; see see https://invent.kde.org/plasma/kwin/-/wikis/Restarting
* Worse performance on weak Intel iGPUs: https://bugs.kde.org/show_bug.cgi?id=452119
* Picture-in-Picture windows from web browsers get a Task Manager icon and do not stay on top: https://bugs.kde.org/show_bug.cgi?id=463288; requires https://gitlab.freedesktop.org/wayland/wayland-protocols/-/merge_requests/132 and adoption in apps using PiP windows (like web browsers)
* Windows marked "Keep above other windows" cover up Meta+V Clipboard menu: https://bugs.kde.org/show_bug.cgi?id=462181
* Dialog Parent effect isn't working: https://bugs.kde.org/show_bug.cgi?id=460819
* Maximized XWayland windows have pixel gaps between screen edges when using a fractional scale factor: https://bugs.kde.org/show_bug.cgi?id=459373
* "Spare Layouts" feature not implemented: https://bugs.kde.org/show_bug.cgi?id=455431
* Using key combination shortcuts to type phrases into windows is not yet implemented: https://bugs.kde.org/show_bug.cgi?id=478219


Cursor is small when hovering over Firefox: https://bugs.kde.org/show_bug.cgi?id=421133
== Accessibility ==
 
* Can't move pointer with numpad keys: https://bugs.kde.org/show_bug.cgi?id=478620
KDE app windows don't remember maximized state: https://bugs.kde.org/show_bug.cgi?id=409919
* Not all Sticky Keys options work: https://bugs.kde.org/show_bug.cgi?id=444335. Input on what is relevant/wanted there is welcome.
 
Can't dismiss a popup by clicking another window of the same application: https://bugreports.qt.io/browse/QTBUG-83972
 
 
== No remote support ==
We don't have an API yet for remote support. Even if we had one, things like TeamViewer would not work any more ('''Partly fixed''' since we now have an API for screencast using a separate KWayland interface. There is also already support in xdg-desktop-portals for convenience of other apps and general support in Flatpaks. What's still missing is an API for remote input.)


== Plasma ==
* XWayland applications may not autostart properly in a Wayland session due to various important environment variables not being set: https://bugs.kde.org/show_bug.cgi?id=469839
* XEmbedSNIProxy window eats input in top-left pixel of the screen: https://bugs.kde.org/show_bug.cgi?id=433079
* Global Menu is not supported for non-Qt apps: https://bugs.kde.org/show_bug.cgi?id=424485
* Installed Chrome apps are grouped together with Chrome windows in Icon-Only Task Manager: https://bugs.kde.org/show_bug.cgi?id=358277
* Plasma quits (doesn't crash) when too many windows are open: https://bugs.kde.org/show_bug.cgi?id=479492


== NVIDIA ==
== NVIDIA ==
The NVIDIA blob uses a custom EGL extension which [https://phabricator.kde.org/D18570 Plasma 5.16 added support] for. It requires setting the ''KWIN_DRM_USE_EGL_STREAMS=1'' environment variable to activate.
* Transient graphical glitches after waking from sleep: https://bugs.kde.org/show_bug.cgi?id=448866
 
* Transient graphical glitches after changing themes: https://bugs.kde.org/show_bug.cgi?id=470503
Other aspects of the "Wayland experience" with NVIDIA such as XWayland compatibility are outside of our influence.
 
'''Partly fixed:''' Requires manual activation.
 
 
== Clipboard ==
No clipboard manager protocol (for e.g. Klipper and clipboard plasmoid) and no clipboard sync with KDE Connect: https://phabricator.kde.org/T4449 (will be fixed with https://invent.kde.org/plasma/plasma-workspace/-/merge_requests/1)
 
 
 
== Input ==
No configurable mouse gestures; X has the ability to accept fake input events to allow programs such as Easystroke. With the new security model of Wayland, such a program would need to be part of the compositor.
 
No XModmap; we lack a functionality like XModmap to remap keys.
 
 
== Plasma ==
Session restoring does not include Wayland native windows. Our sessions management recover engine is based on the [https://www.x.org/releases/X11R7.7/doc/libSM/xsmp.html X Session Management Protocol] and there is apparently currently no generic concept to do it on Wayland. But on Qt it's plugin-able and GNOME has according to [https://wiki.gnome.org/Projects/SessionManagement/GnomeSession their wiki] an own implementation for some time.
 
No window thumbnails; we don't yet have an API for this.
 
No window move on empty area in breeze; This broke with switch to XdgShellV6. Needs new API added to Qt (native interface), KWayland and Breeze.
 
No activities.
 
Keyboard Layout indicator system tray item doesn't work: https://bugs.kde.org/show_bug.cgi?id=390079
 
FIXED in Application 20.08: Top panel overlaps Yakuake: https://bugs.kde.org/show_bug.cgi?id=408468
 
== Drag and Drop issues ==
 
Dragging-and-dropping a file to https://imgur.com in Firefox brings down the whole session: https://bugs.kde.org/show_bug.cgi?id=421130
 
Drag and drop on Wayland: cursor jumps on the screen when mouse button is released and dragged item is dropped into wrong folder https://bugs.kde.org/show_bug.cgi?id=422414
 
https://bugs.kde.org/show_bug.cgi?id=390321
 
https://bugs.kde.org/show_bug.cgi?id=400014
 
https://bugs.kde.org/show_bug.cgi?id=383794
 
https://bugs.kde.org/show_bug.cgi?id=405267
 
https://bugs.kde.org/show_bug.cgi?id=389261
 
reproducible (on my sysyem at least) plasma/kwin crashes
 
https://bugs.kde.org/show_bug.cgi?id=398440
 
https://bugs.kde.org/show_bug.cgi?id=418683


https://bugs.kde.org/show_bug.cgi?id=420949
== Upstream ==
=== Not yet fixed ===
* With screen scaling, cursor size is incorrect when hovering over native Wayland apps written with the GTK toolkit due to its lack of support for the cursor-shape-v1 protocol: https://bugs.kde.org/show_bug.cgi?id=451158. See also https://bugs.kde.org/show_bug.cgi?id=459161 for general cursor size issues.
* With a high DPI mouse, some applications might experience instability or unresponsiveness: https://gitlab.freedesktop.org/wayland/wayland/-/issues/443
=== Fixed or work in progress ===
* With NVIDIA GPU, Plasma popups (e.g. Kickoff and KRunner) sometimes stops showing after opening / closing them a few times: https://bugs.kde.org/show_bug.cgi?id=455913 / https://codereview.qt-project.org/c/qt/qtwayland/+/503674 (Fixed in KWin for Qt <= 6.6.2, Fixed in Qt 6.6.3)
* When using a Chromium-based browser in native Wayland mode, dragging an image to the desktop creates a sticky note out of it: https://bugs.kde.org/show_bug.cgi?id=449645 / https://codereview.qt-project.org/c/qt/qtwayland/+/518017 (Fixed in Qt 6.6) / https://codereview.qt-project.org/c/qt/qtwayland/+/518018 (Not yet merged)
* When dragging images from Firefox to the desktop, have to hold the drag 1 or more seconds over the desktop before releasing or else the desktop drop menu does not appear: https://bugs.kde.org/show_bug.cgi?id=448867 - https://codereview.qt-project.org/c/qt/qtwayland/+/518019 (Fixed in Qt 6.7)
* Quick tile actions and window rules cannot override window's minimum size if needed as they can on X11: https://bugs.kde.org/show_bug.cgi?id=434615 / https://codereview.qt-project.org/c/qt/qtwayland/+/524982 (Fixed in Qt 6.7)
* Wrong app icon in Task Switcher for LibreOffice apps: https://bugreports.qt.io/browse/QTBUG-77182 (Workaround implemented: https://gerrit.libreoffice.org/c/core/+/163249 )
* When dragging files, to trigger a specific result, you have to hold down a modifier key *before* you start dragging, not after: https://bugs.kde.org/show_bug.cgi?id=423031 - https://codereview.qt-project.org/c/qt/qtwayland/+/525413 (Not yet merged)
* QtQuick windows exhibit jittery resizing: https://bugs.kde.org/show_bug.cgi?id=477900 - https://codereview.qt-project.org/c/qt/qtwayland/+/503676 (Work in progress)


https://bugs.kde.org/show_bug.cgi?id=414834
== Fixed upstream ==
These are fixed upstream but neither backportable nor backported to Qt 5. The issues listed in this section will not affect Plasma 6 or newer.


https://bugs.kde.org/show_bug.cgi?id=419017
* plasmashell crashes when hovering or clicking items on the Panel due to "zwp_linux_buffer_params_v1.add" protocol error: https://bugs.kde.org/show_bug.cgi?id=447717; fixed in Qt 6.3
* Wrong positioning of context menu in multiple screens: https://bugs.kde.org/show_bug.cgi?id=436016 / https://bugreports.qt.io/browse/QTBUG-85297; fixed in Qt 6.4
* When using a fractional scale factor, native Wayland apps are slightly blurry: https://bugs.kde.org/show_bug.cgi?id=446674; fixed in Qt 6.6
* Changing scale causes Qt-based software to become blurry until restarted: https://bugreports.qt.io/browse/QTBUG-78327; fixed in Qt 6.6
* Apps using QDesktopServices::openUrl()/Qt.openUrlExternally don't raise existing windows in the activated app: https://codereview.qt-project.org/c/qt/qtwayland/+/321246 and https://codereview.qt-project.org/c/qt/qtbase/+/447556; fixed in Qt 6.5
* QMenus appear as standalone windows when opened using a stylus: https://bugreports.qt.io/browse/QTBUG-111130; fixed in Qt 6.6 - https://github.com/qt/qtwayland/commit/59fae923d72eaf640035237ae6ddb1ccfeba2210
* After dragging-and-dropping a Favorites app in Kickoff, next click anywhere launches that thing: https://bugs.kde.org/show_bug.cgi?id=444489 - Fixed in Qt 6.5
* When the compositor crashes or restarts, Qt apps are killed - Fixed in Qt 6.6
* In multi-monitor setups with at least one scaled display, Context menus have items which are invisible until hovered: https://bugreports.qt.io/browse/QTBUG-93380 - Fixed in Qt 6.6
* When logging into a Wayland session after having previously used the X11 session, all outputs have their scales reset to 100%: https://bugs.kde.org/show_bug.cgi?id=433460
* Context menu text becomes is blurry until interacted with on scaled displays in multi-display setups: https://bugs.kde.org/show_bug.cgi?id=451259
* Some Plasma icons are blurry until interacted with mixed-dpi multi-screen setup: https://bugs.kde.org/show_bug.cgi?id=460493
* QDockWidget does not visually move when moving and is not re-dockable when detached: https://bugreports.qt.io/browse/QTBUG-87332 - fixed in Qt 6.6
* Plasma and apps crash when dragging anything into another app: https://bugs.kde.org/show_bug.cgi?id=470925 - fixed in Qt 6.6
* Unusably poor performance on external screens with NVIDIA Optimus setup: https://bugs.kde.org/show_bug.cgi?id=452219 - NVidia will release a driver that fixes this before Plasma 6.0 is released
* With screen scaling, cursor size was incorrect when hovering over Chromium-based browsers and Electron apps with native Wayland support enabled: cursor-shape-v1 protocol was implemented in Chromium 122: crrev.com/c/5196950, available in Electron 29: https://github.com/electron/electron/releases/tag/v29.0.0

Latest revision as of 22:02, 27 February 2024

This page tracks the "Errata/Known issues" that are specific to the the Plasma Wayland session: significant quality-of-life annoyances, significant problems with workarounds, etc. This is part of KDE's Wayland goal.

It is the Wayland-specific companion to Plasma/X11 Known Significant Issues.


Session management

KWin/compositing/window management

Accessibility

Plasma

NVIDIA

Upstream

Not yet fixed

Fixed or work in progress

Fixed upstream

These are fixed upstream but neither backportable nor backported to Qt 5. The issues listed in this section will not affect Plasma 6 or newer.