After I installed the package virtualbox-guest-x11 on my guest system (Xubuntu 17.10) and do a reboot, I cant use it anymore. The reboot works, but when the desktop appears I first get errors that whiskey menu and another item from the taskbar I don't remember disappeared from the menubar.
They cant be reactivated and it is also impossible to open any other tool. I can click everything and use the keyboard, the GUI reacts but no App will start. No filemanager and not even the terminal.
