Software⏱️ 2 min read📅 2026-05-31

How to Fix: Ubuntu 14.04 LTS live USB boot error (gfxboot.c32:not a valid COM32R image)

Ubuntu 14.04 LTS live USB boot error gfxboot.c32 not a valid COM32R image fix.

Quick Answer: Try using a different initrd file, such as initrd.img-14.04.0-0-generic, instead of gfxboot.c32.

📋 Table of Contents

  1. ✅ Best Solutions to Fix It
  2. ✨ Wrapping Up

The error message 'gfxboot.c32:not a valid COM32R image' is caused by the SYSLINUX bootloader not being able to find a valid COM32R image in the bootable USB stick. This can occur due to incorrect configuration or missing files.

✅ Best Solutions to Fix It

Method 1: Update SYSLINUX

  1. Step 1: Open a terminal and run the command `sudo apt-get update` to ensure your package list is up-to-date.

Method 2: Fix Configuration

  1. Step 1: Open the `syslinux.cfg` file in a text editor and add the following line at the end of the file: `set gfxboot=auto`. This will allow SYSLINUX to automatically detect the correct boot image.

Method 3: Rebuild the Boot Image

  1. Step 1: Open a terminal and run the command `sudo syslinux ` to rebuild the boot image.

✨ Wrapping Up

By following these steps, you should be able to resolve the 'gfxboot.c32:not a valid COM32R image' error and successfully boot from your Ubuntu 14.04 LTS live USB stick.

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