id summary reporter owner description type status component version resolution keywords cc guest host 19590 VBoxClient: The parent session seems to be non-X11 (fixed in 6.1.10) Wheaties Frank Batschulat (Oracle) " Just updated to VirtualBox 6.1.8. The host OS is Fedora 31. The guest is OracleLinux-6.10. The system is a Lenovo W530. I get the message; VBoxClient: The parent session seems to be non-X11. Exiting... on login. Screen resize does not work. Let me know how I can help. Matt" defect reopened guest additions/x11/graphics VirtualBox 6.1.8 oracle linux 6.10 screen resize X11 6.1.8 Linux all