I have just installed Stretch too. During the process, I spotted something, the content of the /var/lib/lxc/<container_name>/config was not correct. I updated the first post and added my config file there. You may try to use that in your device. What I recommend is to destroy all containers, delete all files from /home/.lxc and start over. I also recommend using purely the command-line. (I used that to install Stretch.) If you follow the steps, before you attach the container first, please double-check the config file. I hope finally you will get there. Kabouik: What I spotted was when I started the GUI of the Stretch, I got the same desktop that I configured for the Sid!! In Sid I installed Conky plus a few apps. I didn't expect to see them in Stretch. Conky was started but I got missing icons for the apps as those were installed in Sid only. Is somehow the desktop config shared among the desktop distro installations?