virtualbox.org

1) Installed VirtualBox 6.1.14. on the top of 6.1.2 VMs.

2) ran GuestAdditions (of 6.1.14) on OracleLinux . and restarted Guest.

3) Guest not booting up... Error : VBox Client Could not symbol address (X11Context.pXRRgetMonitors)

VM is stuck with the above error.

How to resolve this issue?.

I tried to run GuestAdditions, as cut&paste between WindowHost & VMGuests not working.

Any help on this greatly appreciated. As the VM not opening, is there anyway to rollback the GuestAdditions offline from VirtualBox VM Manger or Window Host ?

The Guest Additions will need to be uninstalled inside the guest OS using it's 'safe mode' or whatever Linux calls it. Web-search how to boot into the guest OS in a minimal-start mode and uninstall the GAs.

Alternatively try maxing out video RAM.

If these don't fix the guest, Start the guest from full normal shutdown, not save-state. Run until you see the problem happen, then shut down the guest from within the guest OS if possible. If not possible, close the Virtualbox window for the guest with the Power Off option set.

Right-click the guest in the main Virtualbox window's guest list, choose Show Log. Save the far left tab's log, zip it, and post the zip file, using the forum's Upload Attachment tab.