config.vm.provider "virtualbox" do |v|
v.customize ["modifyvm", :id, "--graphicscontroller", "vmsvga"]
end
That could probably considered a vagrant issue. I found that it is a
non-issue with 4.x up to 5.9, but 5.10+ is not compatible with the
default choice. Not sure if the suggested graphics controller is vmsvga
only in 6.1 or depending
on the host graphic card...
It should be possible to change the OVF of the Vagrant Box or add this
to the default Vagrantfile.
Just to better understand your use case, why are you building the
virtualbox guest additions ? This should not be needed anymore since
kernel 5.6, see
https://kernelnewbies.org/Linux_5.6#Support_for_VirtualBox_guest_shared_folders
or am I missing something ?
