After updating Guest Additions, system failed to start

[nurp]

Hi,
I had a working Xubuntu 15.04 virtual machine on Windows 10. Today I upgraded the new version of VirtualBox. Then it notified me of new version of Guest Additions. Then I installed that too.
Ubuntu failed to restart into X mode. I reinstalled Ubuntu and after installing Guest Additions version x.5.18 (or something), it failed again.
I attached the log snapshot
...
Failed to start Detect the available GPUs and deal with any system changes
Failed to start Light Display Manager
...

so I opened another tty and typed
$ sysctl status gpu-manager-service
...
/etc/modprobe.d is not a file
..
Start request repeated too quickly for gpu manager...ice
..

I think it is a bug. Anybody had the similar issue?
Thanks!

[Perryg]

Minimal information needed to be able to help

[raynebc]

There are some known problems with the latest version of guest additions. In my Ubuntu VM, X wouldn't start and I would instead get a "started light display manager" message. I eventually managed to get to a virtual terminal and remove the guest additions with the following:

Code: Select all

sudo /opt/VBoxGuestAdditions-5.0.18/uninstall.sh

I was able to install version 5.0.16 of the guest additions and it's working fine for now.