[ubuntu] 12.10 X screen crashes ocasionally Dell XP 17 optimus

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http://ubuntuforums.org – I've been dealing with this since I bought the laptop a few years back. I accept that NVidia probably won't support optimus which is fine however what is mostly annoying is x screen crashing on a regular basis. So I have bumblebee installed I'm currently on 12.10 and I can use optirun program name to run the program and that's fine however sometimes when booting up my PC I get a white box telling me that the graphic card drivers can't be found do I want to try and repair, re-coinfigure etc. Or I just log in via terminal and type startx and then log out and log back in. I would say this gen (Hardware)