Hey, in Debian 10 after some research i got the guest addition to run, but it still doesn’t resize the window. I verified if the VBox Guest Additions worked by using the shared clipboard feature, and it did work! . But it still doesn’t resize the OS for some reason. Some help would be grateful, thanks.
There may be many reasons why screen auto-size doesn’t work. Try going through the forums online and see if any solutions work for you. virtualbox.org • View topic - [WORKAROUND FOUND] Guest screen auto-resize not working since 6.1.0. Also, try to reinstall the VBox additions. Do try different versions of Guest Additions to see if it works or not.