I upgraded to Ubuntu 12.10, because I was running in this problem
leon@Puget-104167:/$ glxinfo name of display: :0.0 Gen6+ requires Kernel 3.6 or later. glxinfo: ../../../../../src/mesa/main/context.c:1501: _mesa_make_current: Assertion`newCtx->Version > 0' failed. Aborted (core dumped)
So not even glxinfo works, I have a generic Intel card, I google a bit, and found that probably I need to upgrade the Kernel
leon@Puget-104167:/$ uname -r 3.5.0-37-generic
So I came to the conclusion that I need to upgrade the Kernel.
Is it possible to do it on Synaptic, I tried but only get the headers for 3.5.
Thanks a lot