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[ubuntu] PRIME not using nouveau on Thinkpad T530 (Optimus)

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http://ubuntuforums.org – Hi, I am using a brand new installation of 12.10 on a Thinkpad T530 with an Nvidia Optimus graphics card. I installed only a few applications, so the installation can be considered "out of the box". I checked whether PRIME was really using the nvidia card, but that does not seem to be the case. The nouveau drivers package is installed, but Code: DRI_PRIME=1 glxinfo | grep OpenGL returns Code: OpenGL vendor string: Intel Open Source Technology Center OpenGL renderer string: Mesa DRI Intel(R) Ivybridge Mobile x86/MMX/SSE2 OpenGL version string: 3.0 Mesa 9.0 OpenGL (Hardware)