The latest release of xLights for Ubuntu Linux can be found at the following link: https://code.launchpad.net/~chris-debenham/+archive/ubuntu/xlights. For other Linux distributions, an AppImage executable is available at: https://www.adebenham.com/xlights-linux/. You can also download the source from https://github.com/smeighan/xLights and compile as per the included README.linux file.(not recommended)
Add the xLights package archive by running "sudo add-apt-repository ppa:chris-debenham/xlights" in a terminal window.
Update the list of available packages and then install xlights by then running "sudo apt-get update" and "sudo apt-get install xlights".
To enable automatic timing markers you will need to install the Queen Mary Vamp plugins. They can be downloaded from http://isophonics.net/QMVampPlugins. Once downloaded extract the plugins and copy the files qm-vamp-plugins.so, qm-vamp-plugins.cat and qm-vamp-plugins.n3 to either $HOME/vamp/ or /usr/lib/vamp/
Download the latest "xLights-xxxx.xx.glibc2.17-x86_64.AppImage" file from: https://www.adebenham.com/xlights-linux/
Set the AppImage file as an executable (for example ‘chmod +x ./xLights-xxxx.xx.glibc2.17-x86_64.AppImage’) and then run the file directly.