DISPLAX Connect Does Not Start on Ubuntu

DISPLAX Connect Does Not Start on Ubuntu

Why does DISPLAX Connect fail to launch on Ubuntu?

On some Ubuntu systems, DISPLAX Connect may fail to start because a required Qt library dependency is missing.

Qt applications rely on several system libraries that are not always installed by default in Ubuntu, especially on minimal or custom installations.

What is the missing dependency?

The required package is:

      libxcb-cursor0

If this library is not present, DISPLAX Connect and related applications will not run.

Does the DISPLAX Connect installer handle this automatically?

Yes — in most cases.

The DISPLAX Connect installer attempts to install this dependency silently in the background using:

      apt-get install

However, the installation may fail if:

  • The system has no internet access

  • apt repositories are not reachable

  • The user does not have sufficient permissions

  • The system blocks background package installation

How can I manually install the missing dependency?

If DISPLAX Connect does not launch, you can manually install the dependency by following these steps:

  1. Open a Terminal

  2. Run the following commands:

      sudo apt update
      sudo apt install libxcb-cursor0

  1. Once installation is complete, launch DISPLAX Connect again

How can I verify the dependency is installed?

Run:

      dpkg -l | grep libxcb-cursor0

If the package is listed, the dependency is correctly installed.

Additional Recommendations

  • Make sure your Ubuntu system is fully up to date

  • Avoid minimal desktop installs when using Qt-based applications

  • Ensure the user account has sudo privileges during installation

  • If running on a locked-down system, coordinate with IT to allow package installation

Why is this required?

DISPLAX Connect is built using Qt, a cross-platform application framework.
Some Qt modules depend on libxcb-cursor0 to properly handle windowing, cursor management, and UI rendering on Linux systems.