I've finally gotten around to installing and configuring bumblebee. It's working, sort of. It's rather weird because it only works every other time: ~~~~ % cat /proc/acpi/bbswitch 0000:01:00.0 OFF % primusrun glxspheres64 primus: fatal: Bumblebee daemon reported: error: [XORG] (EE) NVIDIA(GPU-0): Failed to initialize the NVIDIA GPU at PCI:1:0:0. Please % primusrun glxspheres64 Polygons in scene: 62464 Visual ID of window: 0x20 Context is Direct OpenGL Renderer: GeForce GT 750M/PCIe/SSE2 62.103457 frames/sec - 69.307458 Mpixels/sec ~~~~ And so it goes on. The next run of `primusrun` fails, usually with the message ~~~~ % primusrun glxspheres64 primus: fatal: Bumblebee daemon reported: error: [XORG] (EE) Server terminated successfully (0). Closing log file. ~~~~ the next run works. And so on. Very strange behaviour I think. And the $SEARCH_ENGINE doesn't really offer any help either, most people seem to have the problem that it never works, not that it works 50% of the times :( Any and all help much appreciated. /M -- Magnus Therning OpenPGP: 0xAB4DFBA4 email: magnus@therning.org jabber: magnus@therning.org twitter: magthe http://therning.org/magnus Most software today is very much like an Egyptian pyramid with millions of bricks piled on top of each other, with no structural integrity, but just done by brute force and thousands of slaves. -- Alan Kay