How to prevent my Linux notebook fom waking up from sleep when a bluetooth device is connected?

2 min read 22-10-2024

the ifix

How to prevent my Linux notebook fom waking up from sleep when a bluetooth device is connected?

Many Linux users experience the annoyance of their notebooks waking up from sleep mode due to connected Bluetooth devices. This can disrupt your workflow and cause battery drainage. If you’re looking for a solution to this common issue, you've come to the right place! In this article, we’ll explore how to stop your Linux notebook from waking up when a Bluetooth device connects.

Understanding the Problem

The issue arises when a Bluetooth device, such as a mouse or keyboard, sends a signal to the notebook. This signal prompts the system to wake up from sleep mode, leading to unintended interruptions. The original problem scenario can be summarized as follows:

"How can I stop my Linux notebook from waking up from sleep mode when a Bluetooth device is connected?"

Original Code Example

If you are using a terminal to troubleshoot, you might run the following command to see which devices can wake your computer:

cat /proc/acpi/wakeup

This command will display a list of devices that have the potential to wake your system.

Solution: Disable Wake on Bluetooth

Step-by-Step Guide

To prevent your Bluetooth devices from waking your Linux notebook, follow these steps:

Open Terminal: Launch your terminal application on your Linux notebook.
List Wakeup Devices: Use the command below to list all the devices capable of waking your machine:
```
cat /proc/acpi/wakeup
```
Identify the Bluetooth Device: Look for entries related to Bluetooth. They may be listed as something like BT, bluetooth, or even specific device names.
Disable Wake Feature: To prevent the identified Bluetooth device from waking your laptop, use the following command, replacing DEVICE_NAME with the actual device name found in the previous step:
```
echo "DEVICE_NAME" > /proc/acpi/wakeup
```
For example, if your device is named BT, the command will be:
```
echo "BT" > /proc/acpi/wakeup
```
Test the Configuration: After applying the changes, put your notebook to sleep and see if it wakes up when you connect your Bluetooth device.

Additional Tips

Persistent Changes: Keep in mind that these changes are temporary and will revert after a restart. To make them permanent, consider creating a script that runs on startup.
System Settings: Some desktop environments have settings that allow you to manage wake-on-device features directly. Check your system settings under “Power” or “Bluetooth” options for any relevant configurations.

Troubleshooting

If you continue to face issues after these steps, consider:

Checking Bluetooth firmware settings.
Looking into the system logs for any wakeup events using the command:
```
journalctl -b -1 | grep -i "wakeup"
```

Conclusion

By following the steps outlined above, you can successfully prevent your Linux notebook from waking up unexpectedly when a Bluetooth device connects. This will not only enhance your workflow but also help preserve battery life.

Useful Resources

By implementing these strategies, you can gain better control over your system's power management and ensure a more seamless user experience with your Linux notebook.