Introduction: The Elusive ADB USB Passthrough

Virtualizing Android environments on Linux through solutions like Anbox and Waydroid offers immense flexibility for development, testing, and even daily use. However, one of the most common stumbling blocks users encounter is getting Android Debug Bridge (ADB) over USB passthrough to function reliably. Whether you’re trying to debug an application on a physical device from within your virtual Android instance or simply connect external USB devices, a non-functional USB passthrough can halt your progress. This comprehensive guide will walk you through the necessary steps and advanced troubleshooting techniques to conquer ADB USB passthrough issues in Anbox and Waydroid.

Prerequisites: Laying the Groundwork

Before diving into complex configurations, ensure your host system is correctly set up. A solid foundation prevents chasing phantom errors later.

• ADB & Fastboot Tools: Verify ADB and Fastboot are installed and accessible on your host Linux system. You can usually install them via your distribution’s package manager (e.g., sudo apt install adb fastboot on Debian/Ubuntu, sudo pacman -S android-tools on Arch).
• Basic Anbox/Waydroid Functionality: Confirm that Anbox or Waydroid is installed and can launch an Android container successfully, even without USB passthrough working yet.
• System Diagnostics: Familiarize yourself with basic Linux USB diagnostics tools like lsusb (to list USB devices) and dmesg (to check kernel messages related to USB events).

Run adb version on your host to confirm installation:

adb version
Android Debug Bridge version 1.0.41
Version 33.0.3-8952116
...

Step 1: Verify Host System ADB Configuration

Your host system needs to properly recognize and interact with USB devices before Anbox or Waydroid can even attempt to pass them through.

Check for Existing Devices

Before connecting any device, run adb devices on your host. It should show an empty list or your existing physical devices:

adb devices
List of devices attached

This ensures the ADB server is running correctly on your host.

ADB Key Management

Sometimes, ADB authorization issues stem from corrupted or incorrect ADB keys. These are typically located in ~/.android/. If you’re consistently getting