Comment 7 for bug 773065

If I disable the graphics card that has two monitors connected and only use one graphic card with a single monitor connected to it, unity3d starts as expected. Here's the output from unity_support_test:

$ /usr/lib/nux/unity_support_test -p
OpenGL vendor string: NVIDIA Corporation
OpenGL renderer string: GeForce 6200/PCI/SSE2
OpenGL version string: 2.1.2 NVIDIA 270.41.06

Not software rendered: yes
Not blacklisted: yes
GLX fbconfig: yes
GLX texture from pixmap: yes
GL npot or rect textures: yes
GL vertex program: yes
GL fragment program: yes
GL vertex buffer object: yes
GL framebuffer object: yes
GL version is 1.4+: yes

Unity supported: yes