Resolving the Issue of Random Character Generation When Clicking the Mouse in tmux

Tmux is a powerful terminal multiplexer that allows users to manage multiple sessions, windows, and panes. However, some users have reported an issue where tmux generates random characters when clicking the mouse. In this article, we will explore the cause of this problem and provide steps to resolve it.

Troubleshooting Steps

  1. Terminal Emulator Settings:
    • Verify that your terminal emulator’s mouse settings are properly configured.
    • Enable mouse reporting and ensure it is set to the appropriate mode based on your terminal emulator’s documentation.
  2. Update Terminal Emulator:
    • Ensure that you are using the latest version of your terminal emulator.
    • Older versions may have bugs or compatibility issues that have been resolved in newer releases.
  3. Try a Different Terminal Emulator:
    • Test the issue with an alternative terminal emulator to determine if it is specific to your current one.
  4. Disable Custom Mouse Configurations:
    • Temporarily disable any custom mouse settings, scripts, or plugins you have configured to check if they are causing the unexpected behavior.
  5. Reset tmux Configuration:
    • Rename or move your existing ~/.tmux.conf file to start fresh with default settings.
    • Launch a new tmux session to see if the issue persists without any custom configurations.


To stop generating random characters when clicking the mouse in tmux, follow these steps:

  1. Open your terminal application (e.g., Terminal on macOS, Command Prompt on Windows, or any other terminal emulator).
  2. Type the command reset and press Enter.
  3. The terminal will be reset, restoring the default settings.
  4. You can now use tmux or any other command-line application without experiencing the issue of random character generation.

Please note that using the reset command will reset your terminal settings to their default values, so any customizations you may have made will be lost.


In conclusion, if you are encountering the issue of generating random characters when clicking the mouse in tmux, try resetting your terminal settings using the reset command. This will restore the default values and can help resolve any inconsistencies or conflicts causing the problem. Additionally, make sure to keep your terminal emulator up to date and check for any custom mouse configurations that may be affecting the behavior. By following these steps, you can alleviate the issue and restore normal functionality in tmux.