How I Built a GNOME Utility to Disable My Laptop Keyboard (and What I Learned About Linux Input Devices)

说明与用途

KeyFlip 在连接外部键盘时自动禁用笔记本内置键盘，利用 udev 热插拔事件和安全回退机制。

问题

When using an external keyboard with a laptop, accidental typing on the built‑in keyboard drains productivity and can lock users out of input.

结果

KeyFlip reliably disables the laptop keyboard when an external keyboard is connected, prevents accidental lockout, and runs with minimal overhead.

工作流

• Detect built‑in keyboard via bus type and physical path
• Subscribe to udev hotplug events for real‑time device changes
• On external keyboard connect: disable built‑in keyboard if detection is confident
• On disconnect: immediately re‑enable built‑in keyboard
• Provide tray icon for manual override and status display

证据

KeyFlip identifies the internal keyboard by its bus type and physical path…

来源

The result: near‑instant response when you plug in or unplug a keyboard, with essentially no idle overhead.

来源