(Compose key not working)
(Plasma: We have window thumbnails now! See https://invent.kde.org/plasma/plasma-desktop/-/merge_requests/36/)
 
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This page tracks the Wayland showstoppers through out the stack
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This page tracks the Wayland showstoppers throughout the stack.
  
== General issues ==
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== KWin/compositing/window management ==
=== NVIDIA ===
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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).
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]
 
  
=== NVIDIA + XWayland ===
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Task Switchers are sometimes black and unusable: https://bugs.kde.org/show_bug.cgi?id=415798
XWayland also uses the DRM/GBM mechanism. Due to that XWayland is not supporting OpenGL on NVIDIA even if KWin would support NVIDIA's eglstream. This would result in a terrible experience for all gamers.
 
  
=== QT_QPA_PLATFORM ===
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XWayland windows are upscaled and look blurry and ugly in HiDPI mode: https://bugs.kde.org/show_bug.cgi?id=389191
QT_QPA_PLATFORM is set to wayland breaking any application which has Qt included (e.g. appimages, proprietary software) and doesn't have wayland QPA.
 
  
'''Fixed'''
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Cursor lags under high CPU load: https://bugs.kde.org/show_bug.cgi?id=421131
by not setting the variable in system, but let every app decide on itself. Should be revisited once we can rely on Qt 5.11 and its new QT_QPA_PLATFORM behavior.
 
  
=== No remote support ===
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KDE app windows don't remember maximized state: https://bugs.kde.org/show_bug.cgi?id=409919
We don't have an API yet for remote support. Even if we had things like TeamViewer would not work any more.
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 +
Can't dismiss a popup by clicking another window of the same application: https://bugreports.qt.io/browse/QTBUG-83972
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 +
== 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).
 +
 
 +
== NVIDIA ==
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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.
 +
 
 +
Other aspects of the "Wayland experience" with NVIDIA such as XWayland compatibility are outside of our influence.
 +
 
 +
'''Partly fixed:''' Requires manual activation.
  
'''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.
 
  
 
== Input ==
 
== Input ==
=== No (wacom) Tablet support ===
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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 configurable gestures ===
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No XModmap; we lack a functionality like XModmap to remap keys.
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]
 
  
 
== Plasma ==
 
== Plasma ==
=== Virtual Desktops ===
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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.
We don't have an API yet for virtual desktops, so pager is not working
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 +
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.
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 +
No activities.
 +
 
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Keyboard Layout indicator system tray item doesn't work: https://bugs.kde.org/show_bug.cgi?id=390079
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 +
== Drag and Drop issues ==
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 +
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
  
=== No window thumbnails ===
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Drag and drop on Wayland: Wrong drop destination on drag'n drop https://bugs.kde.org/show_bug.cgi?id=422414
We don't have an API yet for window thumbnails.
 
  
=== No window move on empty area in breeze ===
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https://bugs.kde.org/show_bug.cgi?id=390321
Broke with switch to XdgShellV6. Needs new API added to Qt (native interface), KWayland and Breeze.
 
  
=== Logout ===
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https://bugs.kde.org/show_bug.cgi?id=400014
[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
 
  
=== No activities ===
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https://bugs.kde.org/show_bug.cgi?id=383794
Activities are probably not a must-have feature, but anyway this is annoying for those who got accustomed to them on X11.
 
  
== Qt ==
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https://bugs.kde.org/show_bug.cgi?id=405267
=== No animated cursors ===
 
See [https://bugreports.qt.io/browse/QTBUG-48181 QTBUG-48181]
 
  
=== wl_proxy_create_wrapper  ===
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https://bugs.kde.org/show_bug.cgi?id=389261
http://bugs.kde.org/381630 (Fixed in Qt 5.9.5)
 
  
=== Key repeat not working ===
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reproducible (on my sysyem at least) plasma/kwin crashes
See [https://bugreports.qt.io/browse/QTBUG-55615 QTBUG-55615]
 
  
=== Compose key not working ===
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https://bugs.kde.org/show_bug.cgi?id=398440
Will be fixed in Qt 5.11, [https://wiki.qt.io/Qt_5.11_Release expected May 2018]. See [https://bugreports.qt.io/browse/QTBUG-54792 QTBUG-54792]
 
  
'''Fixed''' in Qt 5.11
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https://bugs.kde.org/show_bug.cgi?id=418683
  
=== No tablet support ===
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https://bugs.kde.org/show_bug.cgi?id=420949
QtWayland does not yet support the tablet API. So even if KWin had support Qt would not be able to use it.
 
  
=== Fullscreen does not work ===
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https://bugs.kde.org/show_bug.cgi?id=414834
see [https://bugreports.qt.io/browse/QTBUG-63748 QTBUG-63748]
 
  
'''Fixed'''
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https://bugs.kde.org/show_bug.cgi?id=419017

Latest revision as of 19:55, 5 August 2020

This page tracks the Wayland showstoppers throughout the stack.

KWin/compositing/window management

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

Cursor lags under high CPU load: https://bugs.kde.org/show_bug.cgi?id=421131

KDE app windows don't remember maximized state: https://bugs.kde.org/show_bug.cgi?id=409919

Can't dismiss a popup by clicking another window of the same application: https://bugreports.qt.io/browse/QTBUG-83972

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).

NVIDIA

The NVIDIA blob uses a custom EGL extension which Plasma 5.16 added support for. It requires setting the KWIN_DRM_USE_EGL_STREAMS=1 environment variable to activate.

Other aspects of the "Wayland experience" with NVIDIA such as XWayland compatibility are outside of our influence.

Partly fixed: Requires manual activation.


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 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 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

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: Wrong drop destination on drag'n drop 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

https://bugs.kde.org/show_bug.cgi?id=414834

https://bugs.kde.org/show_bug.cgi?id=419017


This page was last edited on 5 August 2020, at 19:55. Content is available under Creative Commons License SA 4.0 unless otherwise noted.