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I just upgraded the distribution from 13.04 to 14.04 and than to 14.10 in hope of some fixes but I got instead a big one that reminds me of very much of ... windows lags. I hope is not a feature.

The Desktop somehow doesn't clear itself, the image bellow describes it better than words:

Issue

I hate to say it but it worked before just fine.

Did you experienced this issue ? Is it an effect fail ? Is it a 3D graphics fail ? And more specially how do I fix it?

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closed as off-topic by karel, user68186, Thomas Ward♦, Aditya, bain Jul 3 '14 at 12:42

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "Bug reports and problems specific to development version of Ubuntu should be reported on Launchpad so that developers can see, track and fix these issues." – karel, user68186, Thomas Ward, Aditya, bain
If this question can be reworded to fit the rules in the help center, please edit the question.
    
14.10 is not yet released, and is still being developed. Questions related to the in-development release of Ubuntu are offtopic here. – Thomas Ward♦ Jul 3 '14 at 2:06
    
Oh sorry I didn't knew that. – Tiberiu C. Jul 3 '14 at 2:11
    
For future reference, you can read about what things are on topic here in the help center. – Thomas Ward♦ Jul 3 '14 at 2:13
    
Ok, I will flag the question – Tiberiu C. Jul 3 '14 at 2:19
up vote 2 down vote

reset the unity 

$ unity-reset
$ setsid unity

if that didnt workout try to re-install the unity & the desktop

$ sudo apt-get autoremove ubuntu-desktop 
$ sudo apt-get autoremove unity 
$ sudo apt-get update 
$ sudo apt-get install unity
$ sudo apt-get install unity-2d 
$ sudo apt-get install ubuntu-desktop 
$ sudo shutdown -r
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