Originally Posted by UbuntuRevolution
~$ glxinfo | grep -i render
direct rendering: Yes
OpenGL renderer string: Mesa DRI Mobile Intel® GM45 Express Chipset GEM 20091221 2009Q4 x86/MMX/SSE2
it's all ok ? sorry im very new on linux
I has been a while since I've used an onboard GPU for anything 3D on Linux. I also didn't think the Mesa drivers were capable for decent 3D rendering, but I may be mistaken.
Do you have an NVidia based GPU you could try in the system? It will mean installing the NVidia drivers and re-testing the game.
For someone new to Linux you have your desktop setup quite nicely!
In short, I think
it may be a limitation of your onboard graphics chipset and driver support.