#1147186 kylin-calendar: rendering artifacts with window effects enabled under UKWM

Package:
kylin-calendar
Source:
kylin-calendar
Description:
Calendar application for Kylin desktop environment
Submitter:
Pan Zhang
Date:
2026-09-09 03:35:02 UTC
Severity:
normal
#1147186#5
Date:
2026-09-09 03:32:27 UTC
From:
To:
Dear Maintainer,

In a UKWM (X11) session, enabling Settings -> Theme -> Window Effects ->
“Effects mode” causes the calendar popup window to show ghosting and
residual rendering artifacts.

Steps to reproduce:

   1. Log into a UKWM (X11) session.
   2. Enable “Effects mode” in Settings -> Theme -> Window Effects.
   3. Open the calendar popup.
   4. Move, scroll, or refocus the window.

Actual result:

The calendar window shows ghosting and residual artifacts.

Expected result:

The window should render normally with effects enabled.

Disabling “Effects mode” restores normal rendering.

The issue occurs because the calendar window uses a translucent
background, but the UKWM compositor does not provide the blur support
expected by the application. This results in a translucent surface
without proper blur handling.

Reproduced with:

   - kylin-calendar 5.0.0.0-1
   - libukwm-1 1.2.3
   - UKWM X11 session

Regards,