November, 2025

jtop has been updated, and is now being actively maintained. Therefore, this patch is no longer needed, and should not be installed.

jetson-jtop-patch

A patch to resolve the "Jetpack NOT DETECTED" issue in jtop version 4.3.2 on the Jetson Orin when JetPack 6.2.1 or JetPack 5.1.5 is installed. This should be a temporary fix until Jtop gets updated.

The Problem

When running jtop on a Jetson with a specific jetson-stats configuration, users may encounter a message that says "Jetpack not installed" on the main dashboard. This is due to a known issue in jtop version 4.3.2 where the script that determines the Jetpack version does not know about a new vesion of JetPack.

This repository provides a simple, automated fix for this problem.

The Solution

This repository contains two key files:

1. jtop_patch.diff: A diff file that contains the necessary changes to a core Python script.
2. apply_jtop_fix.sh: A shell script that automatically applies the patch, creates a backup of the original file, and verifies the jtop version before making any changes.

How to Run the Fix

1. Clone the repository and apply fix

   git clone https://github.com/jetsonhacks/jetson-jtop-patch.git
   cd jetson-jtop-patch
   chmod +x apply_jtop_fix.sh
   ./apply_jtop_fix.sh

2. Reboot your Jetson: The script will inform you to reboot the system for the changes to take effect.

   sudo reboot

After the reboot, run jtop again, and the "Jetpack not installed" message should no longer appear.

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Notes

How the Diff File was Generated

The jtop_patch.diff file was created by comparing the original jetson_variables.py script with a new, modified version that correctly identifies the Jetpack installation on the Jetson Orin Nano.

The command used to generate this file is as follows, assuming the new, modified file is saved as jetson_variables_new.py in your home directory (~/):

# Locate the original file's path
ORIGINAL_PATH=$(python3 -c "import jtop, os; print(os.path.join(os.path.dirname(jtop.__file__), 'jetson_variables.py'))")

# Run the diff command to create the patch file
diff -u $ORIGINAL_PATH ~/jetson_variables_new.py > jtop_patch.diff

Release Notes

August 3, 2025

• Initial Release