On 4/15/19 6:38 AM, Erik P. Olsen wrote:
VirtualBox Guest Additions: Look at /var/log/vboxadd-setup.log to
find out what
went wrong
Did you do this?
VirtualBox Guest Additions: modprobe vboxsf failed
You can try loading the kernel module yourself to see what the error
message is.
One likely cause is that you are using an EFI system with secure boot
enabled. In that case you either have to disable it or sign the kernel
module and add the key to the EFI table using mokutil.