Failed to open a session for the virtual machine error on VirtualBox ! Fix by George Sruthin | Apr 21, 2015 | Howtos | 0 comments Failed to open a session for the virtual machine error on VirtualBox How to fix this in linux this happens when you start your virtual machine first this error message will display followed by second one to fix this you need to open terminal then type sudo apt-get install virtualbox-dkms this will fix the error George Sruthin Founder of techridez.com, an HPE Certified Server Support Engineer, who has been blogging as a hobby since 2010, Loves Web Designing