https://bugs.kde.org/show_bug.cgi?id=525893
Bug ID: 525893
Summary: Video breaks in Haruna/Kdenlive when
XDG_CURRENT_DESKTOP=KDE. Fixed by setting it to
something else instead.
Classification: I don't know
Product: kde
Version First unspecified
Reported In:
Platform: CachyOS
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
DESCRIPTION
Video fails to render in Qt6/QML applications when XDG_CURRENT_DESKTOP
identifies the session as KDE.
Not a common issue. Roughly 3 other reports of the same symptom seen online.
Affected
- Haruna: video does not render, reports "No video track detected" despite the
file being valid
- Kdenlive: project/clip monitor plays audio, no video
- A third-party Plasma video wallpaper plugin (not maintained by KDE): same
symptom
Not affected
- mpv (CLI)
- VLC
STEPS TO REPRODUCE
1. Open Haruna
2. Try to play any video file
OBSERVED RESULT
No video renders. Audio plays if present. Haruna reports "No video track
detected" even though the file is valid.
EXPECTED RESULT
Video plays normally.
SOFTWARE/OS VERSIONS
Operating System: CachyOS Linux, kernel 7.2.5-1-cachyos
KDE Plasma Version: 6.7.5
KDE Frameworks Version: 6.30.0
Qt Version: 6.11.2
ADDITIONAL INFORMATION
- qt6-base: 6.11.2-3.1
- qt6-declarative: 6.11.2-2.1
- plasma-integration: 6.7.5-1.1
- GPU: Nvidia RTX 3070
- Nvidia driver (nvidia-utils): 615.71.09-1
- Haruna: 1.8.1-2.1
- Kdenlive: 26.08.1-1.1
- ffmpeg: 2:9.0.1-4.1
Ruled out through testing: ffmpeg/decoding, Nvidia GL driver, Qt Quick RHI
backend, GLX vs EGL, device permissions, Wayland vs XWayland,
plasma-integration package version, Qt platform theme plugin.
Isolated: setting the environment variable XDG_CURRENT_DESKTOP to a non-KDE
value (e.g. "null") before launching Haruna makes video work normally. This is
the only variable found so far that affects whether video renders.
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