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I am using using ubuntu 11.10. Everything was working perfectly this morning. At a moment "Ubuntu software center" application was unable to get started. So I restarted by system and when I logged in it started under GNOME. Again when I try to start in ubuntu session then it was not showing in menu list but Ubuntu 2D is coming. I don't come to know why this is happening.

please let me know any fix for this issue.

vivek@vivek-desktop:~/Desktop$ glxinfo | grep rendering
direct rendering: Yes

vivek@vivek-desktop:~/Desktop$ glxgears
Running synchronized to the vertical refresh.  The framerate should be
approximately the same as the monitor refresh rate.
301 frames in 5.0 seconds = 60.075 FPS
301 frames in 5.0 seconds = 60.018 FPS
301 frames in 5.0 seconds = 60.018 FPS
301 frames in 5.0 seconds = 60.017 FPS
299 frames in 5.0 seconds = 59.616 FPS
301 frames in 5.0 seconds = 60.016 FPS
301 frames in 5.0 seconds = 60.021 FPS
301 frames in 5.0 seconds = 60.018 FPS
301 frames in 5.0 seconds = 60.019 FPS
300 frames in 5.0 seconds = 59.817 FPS
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closed as too localized by Luis Alvarado Mar 14 '13 at 17:23

This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.

    
so what did you usually use? unity 3D? Did you install any updates? If so, you might have lost OpenGL support, which is required for Unity 3D. You can check that with glxinfo and try it with glxgears. If this doesnt work you should check your graphics driver information. –  Michael K Nov 24 '11 at 6:34
    
I was using unity 3D, before this error. –  dearvivekkumar Nov 24 '11 at 6:40
    
Then please type in a terminal: glxinfo | grep rendering - if there is a no then report this here. Else check whether glxgears opens a window with rotating 3D gears and report your results here :-) –  Michael K Nov 24 '11 at 6:57
    
Okay I'm away now. Thanks for your time! –  dearvivekkumar Nov 24 '11 at 7:00
    
This question appears to be abandoned and unanswered, could you perhaps add more detail to your question? If this question no longer applies then you can either delete it or answer it yourself if you've solved the problem. Thanks! –  coversnail Apr 10 '12 at 16:28

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