hluk/CopyQ

After upgrade to version 12 start failing copy command on Linux: ScriptError: Failed to copy to clipboard!

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#3253 opened on Oct 14, 2025

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X11help wanted

Description

After one of latest update copyq, start fails copy with "exit code 4".

Describe the bug I've made script based on example https://copyq.readthedocs.io/en/latest/command-examples.html#replace-all-occurrences-in-selected-text, that works fine more than year.

But recently start fails like:

Note: Exception in command "Keyboard layout change (xneur like)": ScriptError: Failed to copy to clipboard!
Note:    
Note:    --- backtrace ---
Note:    f@:1
Note:    copy2@eval code:15
Note:    %entry@eval code:24
Note:    f@:1
Note:    eval:// Copy without changing...
Note:    eval
Note:    --- end backtrace ---

To Reproduce

  1. Import example command https://copyq.readthedocs.io/en/latest/command-examples.html#replace-all-occurrences-in-selected-text
  2. In editor select any text
  3. Call command (by action or previously assigned shortcut)

Expected behavior Text copied

Screenshots

Version, OS and Environment

$ copyq version
CopyQ Clipboard Manager 12.0.1
Qt: 6.9.2
KNotifications: 6.18.0
Compiler: GCC
Arch: x86_64-little_endian-lp64
OS: Fedora Linux 42 (KDE Plasma Desktop Edition)
  • Installation method: Official fedora repos rpm

Contributor guide

Tech stack
cpp
Domain
desktop
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
C++Qt frameworkclipboard APIsLinux debugging
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
35
Research direction
Investigate recent changes to clipboard handling in CopyQ, particularly around Qt 6.9.2 and platform specific code for Linux (Wayland vs X11). Look at commits in src/app/clipboardmonitor.cpp and clipboard.cpp. The error 'exit code 4' suggests a backend failure; check if environment variables like QT QPA PLATFORM affect behavior. Review the discussion for any identified root cause or workaround.