Yoga 7 Pro-Slim/Realtek® ALC3306 Audio Fix

In laptops with the Realtek ALC3306 audio card,there's an issue with current and past kernels when using Alsa Mixer; the Master volume gets triggered by the volume keys of the laptops, but the PCM volume gets immediately set to 100%, no matter the Master volume level. This directly set the volume of the speakers to 100%.

When Alsa Mixer gets updated, the original file gets restored, thus removing the fix.

The fix is to add to the /usr/share/alsa-card-profile/mixer/paths/analog-output.conf.common the three lines below, at the beginning of the file, followed by a laptop reboot:

[Element Master]
switch = mute
volume = ignore

This scripts aims to automate this process by checking for the presence of the strings required at boot, and, if missing, re populating the file, and issuing a reboot. This is achieved through a Python script that is run by a systemd service.

Follow the instructions below to configure it on your machine:

Create a systemd Service File:

Create a new systemd service file for your script. Place this file in the /etc/systemd/system/ directory with a .service extension, such as /etc/systemd/system/fix_volume.service. Use the template below as reference:
```
[Unit]
Description=Launch a script to fix the binary volume issue with this laptop.

[Service]
ExecStart=/usr/bin/python3 /path/to/your/script.py
User=root
Group=root
Restart=on-failure

[Install]
WantedBy=multi-user.target
```
- Replace /path/to/your/script.py with the actual path to your Python script.
Reload systemd:

After creating the service file, you need to reload the systemd manager to pick up the new service:
```
sudo systemctl daemon-reload
```
Enable and Start the Service:

To enable the service to start at boot, use the following commands:
```
sudo systemctl enable fix_volume.service
```
Start the Service:

You can start the service immediately with:
```
sudo systemctl start fix_volume.service
```
This will execute your script as root.
Check the Service Status:

You can check the status of the service to ensure it's running and see any potential errors:
```
sudo systemctl status fix_volume.service
```

Hekel1989/yoga-7-pro-audio-fix

Yoga 7 Pro-Slim/Realtek® ALC3306 Audio Fix