Using latest Mesa CVS with Unichrome DRI and Xorg 6.8.1, I'm getting this assert
failure if my application tries to open a window at the same size as the screen
resolution, or calls glutFullScreen().

via_context.c:218: calculate_buffer_parameters: Assertion `vmesa->back.pitch ==
vmesa->front.pitch' failed.

The following is enough to trigger it (with screen res at 800x600):
   
  glutInit(&argc, argv);
  glutInitWindowPosition(0, 0); 
  glutInitWindowSize( 800, 600);
  glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE | GLUT_ALPHA);
  if (glutCreateWindow("test") == GL_FALSE) exit(1);

With 'glutInitWindowSize( 799, 599);' the asset doesn't fail.