crash at startup - SteamOS

[loadrunner]

I just tried the drm free version (from humble bundle) on a different Ubuntu installation with the same Nvidia 750 Ti, last available drivers (367.35 - 2016.7.15) and I have the exact same problem. (if crashes right after the loading bar from the first screen reaches 100%)

The game reports the same version 3.2, but glxinfo says 4.5:

OpenGL vendor string: NVIDIA Corporation
OpenGL renderer string: GeForce GTX 750 Ti/PCIe/SSE2
OpenGL core profile version string: 4.5.0 NVIDIA 367.35
OpenGL core profile shading language version string: 4.50 NVIDIA

It works on different machine with Intel integrated GPU, which ironically is not supported. (but I get around 10 FPS so it's unplayable)

I'm available for tests or debugging.