Control: tag -1 + confirmed syl: > The menu on the top right offers an option to log out (in the submenu "Debian > Live user"), it does not work and crash the system.
I can reproduce something similar with debian-live-9.1.0-amd64-gnome.iso in a libvirt/QEMU VM with QXL graphics: the graphical session disappears (as expected), and then I very briefly see a GDM login screen and then I'm back to a text mode console. I suspect one can blame either GDM or the way it's configured (for autologin) in our Live systems. A Fedora 26 Live system exposes a similar, but different problem: upon logout I'm back to the GDM login screen, I can click "Live System User", I see a password prompt very quickly followed by the text console, and very quickly again I'm back to the GDM login screen. Cheers, -- intrigeri