having an annying issue with my VirtualBox 5 under Ubuntu 15.04, trying to run a Win8.1 VM.
I cannot access any USB devices, nor does the virtualbox interface show that I have any installed. Googling the problem lead me to try a few things, none of which had any effect.
Adding my user to the virtualbox group within ubuntu
sudo usermod -G vboxusers -a $USE
installing the latest VB (rather than the Ubuntu repo version)
installing the latest guest additions
The laptop is very new and possibly down to poor driver support. But is there anything else I can try in the meantime?