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How To Fix HDMI Sound Issues on Ubuntu 18.04

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In this article, we will discuss how to troubleshoot and fix HDMI sound issues on Ubuntu 18.04. HDMI sound issues can be quite frustrating, especially when the sound reverts to another source or there’s no sound after the monitor sleeps. Let’s dive into some possible solutions.

Quick Answer

To fix HDMI sound issues on Ubuntu 18.04, you can start by disabling automatic port switching in Pulse Audio. If that doesn’t work, you can try using a systemd suspend/resume hook or creating a udev rule. However, it’s important to note that there may not be a quick and easy fix for every scenario, and further troubleshooting may be necessary.

Simple Solution: Disable Automatic Port Switching

The first solution we’ll explore involves disabling automatic port switching in Pulse Audio. This is a relatively straightforward fix and is a good starting point.

Step 1: Edit Pulse Audio Configuration File

Open the terminal and type the following command:

sudo nano /etc/pulse/default.pa

This command opens the Pulse Audio configuration file in the nano text editor. The sudo command is used to execute the command with root privileges.

Step 2: Disable Automatic Port Switching

In the opened file, look for the line:

load-module module-switch-on-port-available

This line is responsible for the automatic switching of audio ports. To disable it, insert a # at the beginning of the line. It should look like this:

#load-module module-switch-on-port-available

The # symbol comments out the line, effectively disabling the automatic port switching.

Step 3: Save Changes and Reboot

Press Ctrl+X, then Y, and finally Enter to save the changes and exit the nano editor. After that, reboot your system for the changes to take effect.

Complex Solution: Use Systemd Suspend/Resume Hook

If the simple solution doesn’t work, you can try using a systemd suspend/resume hook to change the default audio output after suspend.

For a detailed guide on how to implement this solution, refer to the Ubuntu changing default audio output after suspend post on Ask Ubuntu.

More Complex Solution: Create a Udev Rule

Another solution is to create a udev rule that automatically switches between internal and HDMI speakers when the HDMI TV is unplugged and replugged.

For a step-by-step guide on how to create such a rule, check out the Switch between internal and HDMI speakers automatically post on Ask Ubuntu.

Conclusion

HDMI sound issues on Ubuntu 18.04 can be quite troublesome, but there are several potential solutions available. We recommend starting with the simple solution of disabling automatic port switching in Pulse Audio. If that doesn’t work, you can explore the more complex solutions involving systemd or udev rules.

Remember, these solutions may not guarantee a fix for every scenario, and it’s possible that further troubleshooting or investigation may be required. Good luck with your troubleshooting!

How do I open the terminal in Ubuntu 18.04?

To open the terminal in Ubuntu 18.04, you can press Ctrl+Alt+T on your keyboard. This keyboard shortcut will open the terminal window.

How do I disable automatic port switching in Pulse Audio?

To disable automatic port switching in Pulse Audio, you need to edit the Pulse Audio configuration file. Open the terminal and type sudo nano /etc/pulse/default.pa to open the file. Look for the line load-module module-switch-on-port-available and insert a # at the beginning of the line to comment it out. Save the changes and reboot your system for the changes to take effect.

How can I implement the systemd suspend/resume hook solution?

For detailed instructions on implementing the systemd suspend/resume hook solution, you can refer to the Ubuntu changing default audio output after suspend post on Ask Ubuntu. The post provides step-by-step instructions to follow.

How do I create a udev rule for switching between internal and HDMI speakers automatically?

To create a udev rule for automatically switching between internal and HDMI speakers, you can follow the step-by-step guide provided in the Switch between internal and HDMI speakers automatically post on Ask Ubuntu. The post provides detailed instructions on creating the udev rule.

Are these solutions guaranteed to fix all HDMI sound issues on Ubuntu 18.04?

These solutions may not guarantee a fix for every HDMI sound issue on Ubuntu 18.04. They are potential solutions that have worked for some users, but it’s possible that further troubleshooting or investigation may be required in some cases.

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