Plasma/X11 Known Significant Issues - KDE Community Wiki
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Plasma
This page tracks the "Errata/Known issues" that are specific to the the Plasma X11 session: significant quality-of-life annoyances, significant problems with workarounds, etc. It is the X11-specific companion to
Plasma/Wayland Known Significant Issues
X server
If the X server crashes, all apps are killed
If a context menu is open, it blocks automatic screen locking and global shortcuts
No isolation between processes; any app can spy on what other apps are doing
No protection from malicious apps secretly recording keystrokes or the screen, etc
Multiscreen/scaling
No support for mixed screen scale screen arrangements
No support for mixed refresh rate screen arrangements with the compositor active
No support for adaptive sync with multiple displays
When screen arrangements change, Plasma and QtQuick-based apps frequently crash:
With a global scale greater than 100%, maximized windows leave gaps around the edges:
With a global scale greater than 100%, cursors, splash screens, and icons in Plasma context menus, and Plasma popup corners are too small:
Plasma
Firefox and Plasma can deadlock one another and both hang when copying something to the clipboard in such a manner that also shows a notification:
Bottoms of notification popups sometimes get cut off:
"Keyboard layout changed" OSD does not work:
KWin/rendering/graphics
Sometimes windows randomly turn black and freeze:
No native touchpad gestures
No support for GPU hot-plug
No support for automatic screen rotation
Bad multi-gpu performance in many cases
No support for HDR
Apps need to opt into color management, so most look wrong on wide color gamut screens, produce screenshots and screen recordings without color profile tags etc
Using 10 bits per color completely breaks many apps
Increased latency and stutter with the compositor active
No recovery from GPU resets in most cases
No reliable way to prevent screen tearing
Enabling adaptive sync requires editing a config file
KWin sometimes crashes when disabling compositing:
Touchscreen gestures eat a pixel on their screen edges, breaking Fitts' law when using a pointing device
Sometimes Overview effect stops accepting keyboard input:
SDDM virtual keyboard is unusably small:
Some windows are transparent on launch, then content fills in later:
Screen locker sometimes randomly falls back to software rendering:
NVIDIA
When reenabling compositing, sometimes windows begin flickering and flipping upside-down:
Systemsettings
No per-device input settings
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