Scilab does not start on Virtualbox with vboxvideo driver

[Norbert]

Steps to reproduce:
1. Run Ubuntu 14.04 LTS on VirtualBox with virtualbox-guest-x11 installed.
2. Install and try to run Scilab 5.5.0.
3. Get error:

$ scilab
libGL error: 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
libEGL warning: failed to create a pipe screen for vboxvideo
libEGL fatal: DRI2: did not find extension DRI_DRI2 version 2

Expected results:
* Scilab can be ran on VirtualBox.

Actual results:
* User is unable to run Scilab on VirtualBox.

Notes:
* Temporary solution is to use
$ LIBGL_ALWAYS_SOFTWARE=1 scilab

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: scilab 5.5.0-2
ProcVersionSignature: Ubuntu 3.13.0-58.97-generic 3.13.11-ckt22
Uname: Linux 3.13.0-58-generic i686
ApportVersion: 2.14.1-0ubuntu3.24
Architecture: i386
CurrentDesktop: MATE
Date: Fri Jun 23 17:11:45 2017
InstallationDate: Installed on 2014-04-18 (1162 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release i386 (20140417)
PackageArchitecture: all
SourcePackage: scilab
UpgradeStatus: No upgrade log present (probably fresh install)

[Norbert (nrbrtx)]

Works on Xenial, then again broken but because of Java.