Software⏱️ 3 min read📅 2026-06-15

How to Fix: graphic error on console

Embedded Linux graphic error issue

Quick Answer: Check for any terminal or console settings that might be causing the issue, such as auto-completion or display settings.

📋 Table of Contents

  1. 🛑 Root Causes of the Error
  2. ✅ Best Solutions to Fix It
  3. 🎯 Final Words

The issue described is a graphical error that affects an embedded system running Linux, causing characters to be displayed in a mirrored format. This error only occurs when typing specific commands or outputting certain information, such as the 'ifconfig' command or the contents of '/var/log/sysl'. The problem seems to be related to auto-completion issues, but it is not limited to specific commands.

This issue can be frustrating for users who are trying to troubleshoot or manage their system. Fortunately, there are steps that can be taken to resolve this problem and improve the overall user experience.

🛑 Root Causes of the Error

  • The root cause of this error appears to be related to the way the terminal emulator is handling input. The mirrored characters may be a result of an incorrect or incomplete character set being used, which is causing the terminal to display characters in a different format.
  • Alternatively, it's possible that there is an issue with the terminal emulator's auto-completion feature, which is not functioning correctly and is resulting in the displayed output being truncated or altered.

✅ Best Solutions to Fix It

Disable Auto-Completion

  1. Step 1: To disable auto-completion, open your terminal configuration file (usually located at '/etc/profile' or '/home/your_username/.profile') and add the following line: 'set -o noclobber'. This will prevent the terminal from trying to complete commands based on previously typed characters.
  2. Step 2: Restart your terminal by running 'source /etc/profile' or 'source ~/.profile', depending on which file you modified earlier. This should resolve the auto-completion issue and display output correctly.
  3. Step 3: If the problem persists, try disabling auto-completion for specific commands by using the '--no-prompt' option when calling a command. For example: 'tail --no-prompt -f /var/log/sysl'

Update Terminal Emulator

  1. Step 1: Check if your terminal emulator is up-to-date by running 'apt-get update' or 'yum update', depending on the Linux distribution you are using. This may resolve any issues related to character sets or auto-completion.
  2. Step 2: If an update is available, install it and restart your terminal. If the problem persists, try updating to a different terminal emulator version.

🎯 Final Words

By disabling auto-completion or updating the terminal emulator, you should be able to resolve the graphical error and display output correctly. If the issue persists, further troubleshooting may be necessary to identify the root cause.

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