LinuxMX-23.4 is a popular Linux distribution known for its robustness and flexibility. Many users prefer it for its sound system, Pipewire, which is a development of the well-known PulseAudio. However, some users have reported an issue where Pipewire stops working a few minutes after connecting a USB audio interface, such as the Focusrite Scarlett 18i20.
Understanding Pipewire
Pipewire is a server and a set of libraries that provide a graph-based pipeline for audio and video that aims at making easy the interoperability between different applications and different devices. Pipewire was born to address the limitations that PulseAudio faced when dealing with low-latency audio and video, and it is the default sound system in many Linux distributions, including LinuxMX-23.4.
The Problem: Pipewire Stops Working with USB Audio Interfaces
Users of LinuxMX-23.4 have reported an issue where Pipewire stops working a few minutes after connecting a USB audio interface. The interface may appear as connected, but no audio is transmitted or received. After a few minutes, the interface disappears from the audio settings, making it impossible to use it until the system is restarted.
Finding the Root Cause
The first step to solve any issue is to find the root cause. The problem may be caused by several factors, including:
- Hardware issues: The USB audio interface may have a problem that affects the communication with Pipewire.
- Software issues: The LinuxMX-23.4 kernel or Pipewire may have a bug that affects the USB audio interface.
- Configuration issues: The configuration of Pipewire or the LinuxMX-23.4 sound system may be improper, affecting the USB audio interface.
Reproducing the Problem
To solve any issue, it is essential to reproduce it. The first step is to connect the USB audio interface to the LinuxMX-23.4 system. The second step is to start using the interface with any audio application that supports it, such as Ardour or JACK. The third step is to wait for a few minutes, monitoring the audio settings of the system.
# connect USB audio interface
$ sudo lsusb
Bus 002 Device 005: ID 1235:8170 Focusrite Scarlett 18i20 2nd Gen
# start using the interface $ ardour &
# monitor the audio settings
$ pactl list | grep -A 3 'Focusrite USB'
Card #1
Name: Focusrite USB
Driver: snd-usb-caiaq
Owner Module: 21
Possible Solutions
After reproducing the problem, the next step is to try possible solutions. The following are some possible solutions that have worked for some users:
Hardware Solutions
If the problem is caused by a hardware issue in the USB audio interface, the following solutions may work:
- Updating the firmware: Some USB audio interfaces have firmware that can be updated, which may fix the problem.
- Changing the USB cable: A faulty USB cable may affect the communication between the interface and the LinuxMX-23.4 system. Changing the cable may fix the problem.
Software Solutions
If the problem is caused by a software issue in the LinuxMX-23.4 kernel or Pipewire, the following solutions may work:
- Updating the kernel: A bug in the LinuxMX-23.4 kernel may be responsible for the problem. Updating the kernel may fix the problem.
- Updating Pipewire: A bug in Pipewire may be responsible for the problem. Updating Pipewire may fix the problem.
- Blacklisting the USB audio interface: If a bug in Pipewire affects only the USB audio interface, blacklisting the interface may stop Pipewire from trying to use it. This solution may prevent the problem but may also prevent using the interface with LinuxMX-23.4.
# blacklist the USB audio interface
$ sudo nano /etc/modprobe.d/blacklist.conf
blacklist snd-usb-caiaq
$ sudo update-initramfs -u
Configuration Solutions
If the problem is caused by a configuration issue, the following solutions may work:
- Modifying the ALSA configuration: LinuxMX-23.4 uses ALSA as the sound driver, which may have a configuration that affects the USB audio interface. Modifying the ALSA configuration may fix the problem.
# modify the ALSA configuration
$ sudo nano /etc/modprobe.d/alsa-base.conf
options snd-usb-caiaq idProduct=0x8170 enable=1
The problem where Pipewire stops working a few minutes after connecting a USB audio interface on LinuxMX-23.4 can have several causes, including hardware, software, and configuration issues. To solve the problem,
- Find the root cause of the problem.
- Reproduce the problem.
- Try possible solutions, including hardware solutions, software solutions, and configuration solutions.