Plasma/X11 Known Significant Issues: Difference between revisions

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== Multiscreen/scaling ==
== Multiscreen/scaling ==
* No support for mixed screen scale screen arrangements
* No support for mixed screen scale screen arrangements
* No support for mixed refresh rate 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: https://bugs.kde.org/show_bug.cgi?id=414805 + https://bugs.kde.org/show_bug.cgi?id=473602 + https://bugs.kde.org/show_bug.cgi?id=446987 + https://bugs.kde.org/show_bug.cgi?id=456947
* When screen arrangements change, Plasma and QtQuick-based apps frequently crash: https://bugs.kde.org/show_bug.cgi?id=414805 + https://bugs.kde.org/show_bug.cgi?id=473602 + https://bugs.kde.org/show_bug.cgi?id=446987 + https://bugs.kde.org/show_bug.cgi?id=456947
* With a global scale greater than 100%, maximized windows leave gaps around the edges: https://bugs.kde.org/show_bug.cgi?id=414522
* With a global scale greater than 100%, maximized windows leave gaps around the edges: https://bugs.kde.org/show_bug.cgi?id=414522
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== KWin/rendering/graphics ==
== KWin/rendering/graphics ==
* Sometimes windows randomly turn black and freeze: https://bugs.kde.org/show_bug.cgi?id=466771
* Sometimes windows randomly turn black and freeze: https://bugs.kde.org/show_bug.cgi?id=466771
* No touchpad gestures
* No native touchpad gestures  
* No support for GPU hot-plug
* No support for GPU hot-plug
* No support for automatic screen rotation
* Bad multi-gpu performance in many cases
* No support for HDR
* 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
* No reliable way to prevent screen tearing
* Enabling adaptive sync requires editing a config file
* KWin sometimes crashes when disabling compositing: https://bugs.kde.org/show_bug.cgi?id=466380
* KWin sometimes crashes when disabling compositing: https://bugs.kde.org/show_bug.cgi?id=466380
* Touchscreen gestures eat a pixel on their screen edges, breaking Fitts' law when using a pointing device
* Touchscreen gestures eat a pixel on their screen edges, breaking Fitts' law when using a pointing device
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== NVIDIA ==
== NVIDIA ==
* When reenabling compositing, sometimes windows begin flickering and flipping upside-down: https://bugs.kde.org/show_bug.cgi?id=450301
* When reenabling compositing, sometimes windows begin flickering and flipping upside-down: https://bugs.kde.org/show_bug.cgi?id=450301
* In Spectacle, Rectangular Region background is sometimes bleached white with certain NVIDIA GPUs: https://bugs.kde.org/show_bug.cgi?id=469022


== System Settings ==
== System Settings ==
* Acceleration profile settings of Mouse & Touchpad KCMs are missing depending on how you open the KCM: https://bugs.kde.org/show_bug.cgi?id=448953
* Acceleration profile settings of Mouse & Touchpad KCMs are missing depending on how you open the KCM: https://bugs.kde.org/show_bug.cgi?id=448953

Latest revision as of 05:26, 26 June 2024

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

Plasma

KWin/rendering/graphics

NVIDIA

System Settings