Plasma/Wayland Known Significant Issues: Difference between revisions

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This page tracks the Wayland showstoppers through out the stack
This page tracks the Wayland showstoppers throughout the stack.


== General issues ==
== KWin/compositing/window management ==
=== No vertical / horizontal maximize of Wayland native clients ===
* No cross-app window activation/focus protocol. As a result, windows don't get brought forward when activated by another app: https://bugs.kde.org/show_bug.cgi?id=424795
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).
* 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).
* XWayland windows are upscaled and look blurry and ugly in HiDPI mode: https://bugs.kde.org/show_bug.cgi?id=389191
* Cursor lags under high CPU load: https://bugs.kde.org/show_bug.cgi?id=421131
* "Pin/keep open" functionality for Plasma applets does not work: https://bugs.kde.org/show_bug.cgi?id=400317
* Focus is inconsistent for XWayland apps: https://bugs.kde.org/show_bug.cgi?id=400987


=== <s>No Drag and Drop between Wayland native and Xwayland clients</s> ===
== Remote control support incomplete ==
<s>From Wayland to Xwayland ignores. From Xwayland to Wayland falls through.</s>
* Our screencasting API handles remote video streaming, but there is no API for remote input, so things like TeamViewer have no way to work (and would need to be ported to use those APIs once they exist).
 
'''Fixed''' in Plasma 5.16
 
=== No remote support ===
We don't have an API yet for remote support. Even if we had 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.
 
=== NVIDIA ===
The NVIDIA blob is not supported as it uses a custom EGL extension. It would require additional code just for NVIDIA. On the other hand many users are on NVIDIA. Further information: [https://blog.martin-graesslin.com/blog/2016/09/to-eglstream-or-not/ To EGL Stream or Not] and [https://blog.martin-graesslin.com/blog/2017/10/plasmawayland-and-nvidia-2017-edition/ Plasma/Wayland and NVIDIA – 2017 edition]
 
'''Partly fixed''' initial support was added in Plasma 5.16
 
=== No Clipboard Manager protocol ===
No clipboard history (e.g. Klipper and clipboard plasmoid) and no clipboard sync with KDE Connect.
 
'''In progress:''' https://phabricator.kde.org/T4449


== Input ==
== Input ==
=== No (wacom) Tablet support ===
* 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.
KWin lacks integration the tablet support from libinput. Also KWayland lacks wrapping the API for it.
* No XModmap; we lack a functionality like XModmap to remap keys.
 
* Can't type accented characters in native Wayland Qt apps: https://bugs.kde.org/show_bug.cgi?id=411729
=== No configurable 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. See [https://github.com/xkbcommon/libxkbcommon/issues/40 xkbcommon-issue40] --> Explain how this issue is related?


== Plasma ==
== Plasma ==
=== Native Wayland windows are not restored ===
* 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.
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 activities.
 
* Session sometimes crashes when changing Global Themes: https://bugs.kde.org/show_bug.cgi?id=422424
=== No window thumbnails ===
We don't have an API yet for window thumbnails.
 
=== No window move on empty area in breeze ===
Broke with switch to XdgShellV6. Needs new API added to Qt (native interface), KWayland and Breeze.
 
=== <s>Logout</s> ===
<s>[https://bugs.kde.org/show_bug.cgi?id=372789 There's a crash I know] (but fixing properly breaks X). [https://github.com/sddm/sddm/issues/897 Might be more stuff with SDDM], needs investigation</s>
 
'''Fixed''' in Plasma 5.16.3
 
=== No activities ===
Activities are probably not a must-have feature, but anyway this is annoying for those who got accustomed to them on X11.
 
== Qt ==
=== <s>No animated cursors</s> ===
<s>See [https://bugreports.qt.io/browse/QTBUG-48181 QTBUG-48181]</s>
 
'''Fixed''' in Qt 5.14
 
=== <s>Key repeat not working</s> ===
<s>See [https://bugreports.qt.io/browse/QTBUG-55615 QTBUG-55615]</s>
 
'''Fixed''' in Qt 5.13
 
=== No tablet support ===
QtWayland does not yet support the tablet API. So even if KWin had support, Qt would not be able to use it.
 
=== <s>Fullscreen does not work</s> ===
<s>see [https://bugreports.qt.io/browse/QTBUG-63748 QTBUG-63748]</s>


'''Fixed''' in Qt 5.12
== Drag and Drop issues ==
* Session crashes when hovering over task manager after dragging an entry in task manager to another virtual desktop: https://bugs.kde.org/show_bug.cgi?id=418683
* plasmashell crashes when dragging a file from Dolphin over a panel: https://bugs.kde.org/show_bug.cgi?id=398440
* Cursor sometimes erroneously displays "no drag possible" icon even when it is possible: https://bugs.kde.org/show_bug.cgi?id=383794
* Can't abort drag-and-drop with the Esc key: https://bugs.kde.org/show_bug.cgi?id=405267

Revision as of 09:16, 28 December 2020

This page tracks the Wayland showstoppers throughout the stack.

KWin/compositing/window management

Remote control support incomplete

  • Our screencasting API handles remote video streaming, but there is no API for remote input, so things like TeamViewer have no way to work (and would need to be ported to use those APIs once they exist).

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.
  • Can't type accented characters in native Wayland Qt apps: https://bugs.kde.org/show_bug.cgi?id=411729

Plasma

  • Session restoring does not include Wayland native windows. Our sessions management recover engine is based on the 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 their wiki an own implementation for some time.
  • No activities.
  • Session sometimes crashes when changing Global Themes: https://bugs.kde.org/show_bug.cgi?id=422424

Drag and Drop issues