Well - I _did_ overlook older Intel graphics are not supported.
Graphics: OpenGL 3.2 Core Profile support, Intel HD 4000-5000 series (Intel HD 3000 series unsupported)
Where it did not work at all: a GM 965/GL960 Integrated Intel (T61) - Open GL I guess 2.1.
Here is a system where it works - albeit the graphics output hangs a lot, can ingame be reset by toggling fullscreen.
description: VGA compatible controller
product: Haswell-ULT Integrated Graphics Controller
vendor: Intel Corporation
server glx version string: 1.4
client glx version string: 1.4
GLX version: 1.4
OpenGL core profile version string: 3.3 (Core Profile) Mesa 11.0.4
OpenGL core profile shading language version string: 3.30
OpenGL version string: 3.0 Mesa 11.0.4
OpenGL shading language version string: 1.30