actually that LIBGL_ALWAYS_SOFTWARE=1 won't work either with current
mesa

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https://bugs.launchpad.net/bugs/1742894

Title:
  Scilab does not start after some upgrades on Ubuntu Xenial

Status in Mesa:
  Confirmed
Status in mesa package in Ubuntu:
  New
Status in scilab package in Ubuntu:
  New
Status in scilab package in Debian:
  New

Bug description:
  Steps to reproduce:
  1. have installed Scilab on Ubuntu Xenial system
  2. install system updates
  3. try to launch Scilab from GUI - it does not start
  4. try to launch Scilab from terminal - it does not start with the following 
output in the terminal:

  $ scilab
  Could not create a Scilab main class. Error:
  Exception in thread "main" java.lang.InternalError: XXX0 profile[1]: GL3bc -> 
profileImpl GL4bc !!! not mapped 
        at com.jogamp.opengl.GLProfile.computeProfileMap(GLProfile.java:2071)
        at 
com.jogamp.opengl.GLProfile.initProfilesForDeviceCritical(GLProfile.java:1954)
        at 
com.jogamp.opengl.GLProfile.initProfilesForDevice(GLProfile.java:1875)
        at 
com.jogamp.opengl.GLProfile.initProfilesForDefaultDevices(GLProfile.java:1842)
        at com.jogamp.opengl.GLProfile.access$000(GLProfile.java:80)
        at com.jogamp.opengl.GLProfile$1.run(GLProfile.java:230)
        at java.security.AccessController.doPrivileged(Native Method)
        at com.jogamp.opengl.GLProfile.initSingleton(GLProfile.java:216)
        at com.jogamp.opengl.GLProfile.getProfileMap(GLProfile.java:2297)
        at com.jogamp.opengl.GLProfile.get(GLProfile.java:988)
        at com.jogamp.opengl.GLProfile.getDefault(GLProfile.java:722)
        at com.jogamp.opengl.GLProfile.getDefault(GLProfile.java:733)
        at org.scilab.modules.gui.SwingView.<init>(Unknown Source)
        at org.scilab.modules.gui.SwingView.registerSwingView(Unknown Source)
        at org.scilab.modules.core.Scilab.<init>(Unknown Source)

  Scilab cannot create Scilab Java Main-Class (we have not been able to
  find the main Scilab class. Check if the Scilab and thirdparty
  packages are available).

  
  Expected results:
  Scilab works normally on Ubuntu 16.04 LTS system.

  Actual results:
  see error above.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: scilab 5.5.2-2ubuntu3
  ProcVersionSignature: Ubuntu 4.4.0-104.127-generic 4.4.98
  Uname: Linux 4.4.0-104-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.15
  Architecture: amd64
  CurrentDesktop: MATE
  Date: Fri Jan 12 12:02:32 2018
  PackageArchitecture: all
  SourcePackage: scilab
  UpgradeStatus: No upgrade log present (probably fresh install)

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