#1146570 ukui-control-center: rendering artifacts under UKWM

Package:
ukui-control-center
Source:
ukui-control-center
Description:
utilities to configure the UKUI desktop
Submitter:
Pan Zhang
Date:
2026-09-03 11:15:01 UTC
Severity:
normal
#1146570#5
Date:
2026-09-03 09:40:30 UTC
From:
To:
Dear Maintainer,

Under a UKWM (X11) session, enabling Settings -> Theme -> Window
Effects -> “Effects mode” causes rendering artifacts and ghosting in
the Control Center window. Disabling effects mode restores normal
rendering.

Steps to reproduce:

   1. Log into a UKWM (X11) session.
   2. Open Settings -> Theme -> Window Effects.
   3. Enable “Effects mode”.
   4. Scroll or drag the Control Center window.

Actual result:

The window shows ghosting and residual rendering artifacts.

Expected result:

The window should render normally when effects mode is enabled.

With effects enabled, org.ukui.style menu-transparency is set to 0.75
and the Control Center uses a translucent window. UKWM does not provide
the KWin blur interface used by the application, resulting in a
translucent window without actual blur.

The application should detect whether the current compositor supports
blur before enabling translucent-background and blur effects. If blur
is unavailable, it should fall back to an opaque window.

Reproduced with:

   - ukui-control-center 4.20.0.1-1
   - libukwm 1.2.3
   - UKWM X11 session

Regards,