Unity 3D supported: no

[motomo]

I'm trying to get OpenGL (3d) working in a Ubuntu 15.04 guest.

I've installed VBOXADDITIONS_5.0.2_102096 but /usr/lib/nux/unity_support_test -p says:

pci id for fd 4: 80ee:beef, driver (null)
libGL error: core dri or dri2 extension not found
libGL error: failed to load driver: vboxvideo
OpenGL vendor string:   VMware, Inc.
OpenGL renderer string: Gallium 0.4 on llvmpipe (LLVM 3.6, 256 bits)
OpenGL version string:  3.0 Mesa 10.5.2

Not software rendered:    no
Not blacklisted:          yes
GLX fbconfig:             yes
GLX texture from pixmap:  yes
GL npot or rect textures: yes
GL vertex program:        yes
GL fragment program:      yes
GL vertex buffer object:  yes
GL framebuffer object:    yes
GL version is 1.4+:       yes

Unity 3D supported:       no

I also get a message about "vboxvideo: module verification failed":

$ cat /var/log/syslog|grep vbox
Aug 30 23:14:09 udev vboxadd[8667]: Starting the VirtualBox Guest Additions ...done.
Aug 30 23:14:10 udev vboxadd-service[8754]: Starting VirtualBox Guest Addition service  ...done.
Aug 30 23:14:10 udev systemd[1]: vboxadd-service.service: control process exited, code=exited status=1
Aug 30 23:14:10 udev systemd[1]: Unit vboxadd-service.service entered failed state.
Aug 30 23:14:10 udev systemd[1]: vboxadd-service.service failed.
Aug 30 23:14:42 udev kernel: [14302.735185] vboxvideo: module verification failed: signature and/or  required key missing - tainting kernel
Aug 30 23:14:42 udev kernel: [14302.736192] [drm] Initialized vboxvideo 1.0.0 20090303 for 0000:00:02.0 on minor 0
Aug 30 23:14:42 udev kernel: [14302.942282] vboxguest: misc device minor 56, IRQ 20, I/O port d020, MMIO at 00000000f0400000 (size 0x400000)
Aug 30 23:14:42 udev kernel: [14302.942283] vboxguest: Successfully loaded version 5.0.2 (interface 0x00010004)
Aug 30 23:14:42 udev kernel: [14306.524633] vboxsf: Successfully loaded version 5.0.2 (interface 0x00010004)
Aug 30 23:14:42 udev systemd-modules-load[188]: Inserted module 'vboxvideo'
Aug 30 23:14:43 udev vboxadd[634]: Starting the VirtualBox Guest Additions ...done.
Aug 30 23:14:43 udev vboxadd-service[896]: Starting VirtualBox Guest Addition service  ...done.
Aug 30 23:14:43 udev systemd[1]: vboxadd-service.service: control process exited, code=exited status=1
Aug 30 23:14:43 udev systemd[1]: Unit vboxadd-service.service entered failed state.
Aug 30 23:14:43 udev systemd[1]: vboxadd-service.service failed.