title: Cannot launch emulator on Linux (Ubuntu 15.10)
body: <p>I try to launch emulator but it outputs into log:</p>
  
  <pre><code>libGL error: unable to load driver: r600_dri.so 
  libGL error: driver pointer missing 
  libGL error: failed to load driver: r600 
  libGL error: unable to load driver: swrast_dri.so 
  libGL error: failed to load driver: swrast 
  X Error of failed request:  GLXBadContext   
  Major opcode of failed request:  155 (GLX)
  Minor opcode of failed request: 6 (X_GLXIsDirect)
  Serial number of failed request:  47
  Current serial number in output stream:  46 
  libGL error: unable to load driver: r600_dri.so 
  libGL error: driver pointer missing 
  libGL error: failed to load driver: r600 
  libGL error: unable to load driver: swrast_dri.so 
  libGL error: failed to load driver: swrast 
  X Error of failed request:  GLXBadContext
  Major opcode of failed request:  155 (GLX)
  Minor opcode of failed request:  6 (X_GLXIsDirect)   
  Serial number of failed request:  47   
  Current serial number in output stream:  46 
  libGL error: unable to load driver: r600_dri.so 
  libGL error: driver pointer missing 
  libGL error: failed to load driver: r600
  libGL error: unable to load driver: swrast_dri.so 
  libGL error: failed to load driver: swrast 
  X Error of failed request:  BadValue (integer parameter out of range for operation)   
  Major opcode of failed request:  155 (GLX)   
  Minor opcode of failed request:  24 (X_GLXCreateNewContext)   
  Value in failed request:  0x0   
  Serial number of failed request:  33   
  Current serial number in output stream:  34 
  QObject::~QObject: Timers cannot be stopped from another thread emulator: WARNING: Increasing RAM size to 1GB
  </code></pre>
  
  <p>How to fix it? I read topics with similar errors but it doesn't help me.</p>