Kdenlive shows gray in the Monitors

Ask Fedora
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1

I’m using Kdenlive on Fedora KDE Plasma, and for some reason, both the Clip Monitor and Project Monitor are gray:

Screenshot_20260917_180353
Screenshot_20260917_1803531327×483 13.6 KB

This happens both in the latest version and in 25.12.3, and in AppImage, Flatpak and the Fedora RPM. This issue does not occur in other distros (or at least not on Kubuntu where I checked). How can I troubleshoot this?

2

See: https://kdenlive.org/bug-reports/, which includes ways to look for existing bugs and fixes, and is the most effective way to get the right people looking at your issue.

3

Already did. They told me to go here because it’s distro-specific.

4

This seemed to work on my end:

sudo dnf install kf5-kirigami2

Reported they were installed, but I re-installed them.

Screenshot_20260921_091915
Screenshot_20260921_0919151286×756 158 KB

If No still, debug info:

❯ gdb kdenlive
GNU gdb (Fedora Linux) 17.2-6.fc45
Copyright (C) 2025 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Type "show copying" and "show warranty" for details.
This GDB was configured as "x86_64-redhat-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<https://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
    <http://www.gnu.org/software/gdb/documentation/>.

For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from kdenlive...

This GDB supports auto-downloading debuginfo from the following URLs:
  <ima:enforcing>
  <https://debuginfod.fedoraproject.org/>
  <ima:ignore>
Enable debuginfod for this session? (y or [n])
5

Unfortunately reinstalling kf5-kirigami2 did not fix the issue.

The output of gdb is posted here.

6

I thought it might be the Appimage, but both (RPM and Appimage) render correctly on my end

7

Just tried Flatpak again, still doesn’t work.

8

So I found a similar bug on KDE’s Bugzilla, and that was caused by the rendering backend being set to Software. In my case it’s set to Automatic, and no change there fixed the issue with Kdenlive.