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[Bug 1580482] Re: virtualbox-guest-x11 isn't working properly in Ubuntu 16.04


I've tested the PPA, and here's the result:

I still encountering the VERR_ACCESS_DENIED issue until I install the
previously not installed virtualbox-guest-dkms package, however the 3D
offloading problem still exist.

About the virtualbox-guest-dkms package, I'm not sure it is really
needed in 16.04 as xenial kernel already packs virtualbox's guest
modules(you can lsmod it even without installing the package)

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  Virtualbox guest additions isn't working properly in Ubuntu 16.04

Status in linux package in Ubuntu:
Status in ubuntu-drivers-common package in Ubuntu:
Status in virtualbox package in Ubuntu:

Bug description:
  ## Symptoms ##
  * OpenGL processing offloading is not supported(3D hardware acceleration is enabled in VM settings and is available on Intel Graphics host)
  * VBoxClient warns about "Failed to connect to the ViratualBox kernel service, rc=VERR_ACCESS_DENIED"(refer attached screenshot)

  You may checkout the screen record for what exactly this issue is about:

  ## Workarounds ##
  Install VirtualBox provided guest additions iso from the menu works

  ## Additional Information ##
  * I uses the VirtualBox from upstream on the host side, the version is 5.0.20
  * Note that the Ubuntu Kernel bundled with 16.04 has integrated VirtualBox guest modules(vboxguest, vboxsf, and vboxvideo specifically) for unknown reason, this bug is reproduced *without* the virtualbox-guest-dkms package(since the Additional Drivers interface doesn't provide me the option to do so(the option is greyed-out, refer attached screenshot))
  * I have another 14.04 VM and it's OpenGL offloading works, so it's not likely that the host isn't providing proper OpenGL functionallity

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: virtualbox-guest-x11 5.0.18-dfsg-2build1
  ProcVersionSignature: Ubuntu 4.4.0-22.39-generic 4.4.8
  Uname: Linux 4.4.0-22-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Wed May 11 12:08:31 2016
  InstallationDate: Installed on 2016-01-07 (124 days ago)
  InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
  SourcePackage: virtualbox
  UpgradeStatus: Upgraded to xenial on 2016-04-07 (33 days ago)

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