Fix for Microphone LED Indicator in Linux

This script fixes the issue with the microphone LED indicator on the key, showing its state (on/off).

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Installation

Copy the script to a system directory:

sudo cp mic-monitor.sh /usr/local/bin/

Set the necessary permissions:

sudo chmod +x /usr/local/bin/mic-monitor.sh

Setting Up the Service

In this case, the code is for a systemd service.

Create the service file:

sudo nano /etc/systemd/system/mic-led.service

Service file code:

[Unit]
Description=Monitor microphone state and control LED
After=sound.target pipewire.service pulseaudio.service
Requires=sound.target

[Service]
Type=simple
ExecStart=/usr/local/bin/mic-monitor.sh
Restart=always
User=root
StandardOutput=journal
StandardError=journal

[Install]
WantedBy=multi-user.target

Starting the Service

Enable the service for auto startup:

sudo systemctl enable mic-led.service

Start the service:

sudo systemctl start mic-led.service