Comment 11 for bug 894132

@bilalakhtar: soulsource just added his similar experience with AMD, so I don't think this is specific to NVidia.

I discovered that there is a tool which is supposed to test for Unity 3D support. I don't know if this is used to decide whether to fire up Unity 3D when you log in, but on my system it incorrectly reports that Unity 3D *is* supported, so that may explain why my system hangs when I try to log in with the default session. Here is the output of unity_support_test:

OpenGL vendor string: NVIDIA Corporation
OpenGL renderer string: GeForce 8800 GTX/PCI/SSE2
OpenGL version string: 3.3.0 NVIDIA 280.13

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 3D supported: yes