oooh, just noticed you are on 64bit system. OOTP is a 32bit app. This is not a problem, but you will need to ensure you have the right 32bit libs installed and working. So when doing the tests above, make sure you are using the 32 bit glxgears/glxinfo as the 64 versions will be using different libraries.
(wont life be simpler once everyone has xfered to 64bit?)