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Sometimes when you install the Axxon One Client, you can have problems with packages, specifically with incompatible versions of Mono mono packages. By default, version 6.8 is installed, but version 6.4 is required for Axxon One to work. To resolve the problem, do the following:

1. Completely remove Mono mono packages by running the commands:
   

   Code Block
   language bash
   sudo apt purge mono* libmono* sudo apt autoremove

2. Run the command again to remove all dependencies:
   

   Code Block
   language bash
   sudo apt autoremove

3. Add repositories by sequentially running the commands:
   

   Code Block
   language bash
   echo 'deb http://download.axxonsoft.com/debian-repository stretch backports/main' | sudo tee -a /etc/apt/sources.list.d/axxonsoft.list echo 'deb http://download.axxonsoft.com/debian-repository weekly main backports/main' | sudo tee -a /etc/apt/sources.list.d/axxonsoft.list wget --quiet -O - "http://download.axxonsoft.com/debian-repository/info@axxonsoft.com.gpg.key" | sudo apt-key --keyring /etc/apt/trusted.gpg.d/axxonsoft.gpg add - && sudo apt-get update

4. Install new mono Install new Mono packages from the repository:
   

   Code Block
   language bash
   sudo apt-get install mono-complete -t stretch

   
   

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By default, the Nouveau driver can be installed in Linux OS. This driver does not guarantee stable operation when using NVIDIA graphics cards for decoding Axxon One detection tools (see Configuring detection toolsDetectors).

To resolve the problem, you need to install the current graphics card driver from the official NVIDIA website and run the command in the terminal:

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1. Change the package configuration using the command:
   

   Code Block
   sudo dpkg-reconfigure axxon-one-core

    

2. In the groups selection dialog box, set the checkbox next to the render group.

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