I was using ubuntu 10.10 from last year. every thing was Ok with that. recently I've installed Ubuntu 12.04 in place of 10.10, after installing that on my Dell laptop, I started to feel uncomfortable.

It to slow event if you move mouse then its feel like i'll take 1min to move one place 2 another..

I know why this is happening, all because of 12.04 runs my CPU up to 99%-100% all over time.

And there are 2-3 processes who use all the cpu.. like
1. System_Monitor
2. compiz
I don't know why its use all the CPU even Other app can't able to run .. in Ubuntu 10.10 every think was Ok..

Any solution for this problem..!! |


  • 1
    And what might those 2-3 processes be?
    – daithib8
    May 21, 2012 at 13:15
  • 1
    Please detail in your question the specifications of your laptop in terms of Memory (RAM), HDD space, swap, CPU type, graphics card,graphics driver. Thanks.
    – fossfreedom
    May 21, 2012 at 13:51
  • Also, the model of laptop (DELL has plenty of different models) would be interesting.
    – MrMuretto
    Jun 10, 2012 at 21:23

2 Answers 2


Not talking about 100% cpu here but this bug is responsible for significant cpu usage on 12.04:


Fix is URGENTLY needed. But until that is available, no solution seems to help.


It seems a problem with the graphics card. Check if there are restricted drivers for your GPU, more on this here https://help.ubuntu.com/community/RestrictedDrivers.

If you have an old computer try Unity 2d, you can follow these instructions How do I install and switch to the Unity 2D desktop?

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