Hello Brian, sorry for the delay, these files are only available on my workstation. "with_gpu" means that the nvidia driver was active in Ubuntu. I made sure that I have an up to date file of the glxinfo saved and I noticed that the Mesa version is still 7.7.1 though I compiled 8.02 last week. Then I guess this will be my question: how to force Ubuntu to use the one I compiled instead of the repository provided one? --Bence <div class="gmail_quote">2012/4/6 Brian Paul <<a href="mailto:brianp@vmware.com" target="_blank">brianp@vmware.com</a>> <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div>On 04/04/2012 08:43 AM, Bence Magyar wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> Hello, I'm working at a research company dealing with robotics and have a nice piece of code which uses OpenGL. The problem is that one of the robots does not have a GPU which I could use. I would like to use the same piece of code on the robot without the GPU. I've been doing some research on this topic and found that the Mesa project has a way to disable hardware acceleration on purpose. I'm running on Ubuntu 10.04, compiled the latest release version from source. When I run my application it fails to load the shaders. I ran glxinfo both with GPU driver activated and without (forcing it to use Mesa). "OpenGL vendor string: Mesa Project OpenGL renderer string: Software Rasterizer" What I noticed that I'm missing is the line starting with "OpenGL shading language version string" when running with Mesa, though I also compiled glsl_compiler. Can anyone point me in a direction with this? I am aware that if it's possible it will surely throw me way back in terms of speed but I'd still like to re-implement as less code as possible. </blockquote> </div></div> Can you post the full output of glxinfo? -Brian </blockquote></div>