Diagnosing Phantom Audio Key Events: A Linux Debugging Mystery

This troubleshooting case demonstrates how to trace hardware-level issues that manifest as application-layer errors in Linux. Using libinput and udev tools, the investigation reveals that recurring keyboard events originate from an audio device driver—a common but often misdiagnosed problem. For Linux users experiencing similar issues with modern audio hardware, this practical guide to system-level debugging offers valuable methodology beyond simple application-level troubleshooting.