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Graphics performance

The graphics on my system execute very slowly - not at all like in the demos. How do I fix this?

The most usual cause is the lack of proper graphics hardware or drivers. For hardware you should have a reasonably modern graphics card from NVidia or AMD.

Multiple monitors

I am using a Cell along with another (main) monitor. The Graphics window does not open on the Cell, but on the main display. How do I get the graphics on the Cell?

The problem stems from Gnome display manager that limits the locations of application windows, with some rather strange logic.

The usual solution is to enable the full-screen mode, and place the OpenGL viewport to the desired location:

  1. open file ~/.MultiTouch/screen.xml
  2. set fullscreen field to 1
  3. edit the window->area->location to match the Cell graphics location

Videos not playing

The videos do not play - they get stuck in the first frame. How to fix?

The most usual source of problems is that the audio output is not working properly (video playback is synchronized to the audio output). Most probably some other application is already using the audio device you intended to use. Quite often this is the system sound daemon, which can be disabled.