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I'm currently using Ubuntu 14.04 for some development needs and I often encounter with lagging issues and glitches as shown below: (see in the titlebar and icons and in the eclipse in the background)

enter image description here

I've no idea what it's all about. Can you suggest me what can I do?

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What is your video card and driver? – Photon May 26 '14 at 10:38
Are you using a Nvidia Optimus system? Could you please take a screenshot of the Monitors section of System Settings? – nastys May 26 '14 at 10:39
BTW, I do not have any additional graphics card. I use a laptop with Intel mobile GMA. – Danny Archer May 26 '14 at 13:37
What laptop are you using exactly? – nastys May 27 '14 at 9:01
@nastys Toshiba L510 – Danny Archer May 27 '14 at 12:52

Your GPU isn't completely supported. You can use a workaround or disable the GPU driver and use the CPU for rendering.


Install the CompizConfig Settings Manager.

Open it, then go to Composite

Set as follows (change the refresh rate according to your monitor if needed):

Go back and go to OpenGL

Set as follows:

Disable the Intel GMA GPU

Open a terminal and enter:

`sudo apt-get remove xserver-xorg-video-intel`
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This seems to be bite my warranty. Are you sure I want to try these? – Danny Archer May 27 '14 at 15:59
@Gowtham The first part (workaround) should not cause problems because we're only disabling some features of the window manager (and will certainly not damage the GPU). The second uninstalls the driver, and you can reinstall it later if you have any problem. Both will not void your warranty. I think you should experiment with options in CCSM first, then remove the driver if it doesn't work. – nastys May 27 '14 at 16:11
Your workaround almost crashed my system. – Danny Archer May 27 '14 at 16:19
@Gowtham Don't worry, it is normal that when you check or uncheck some options the display acts a bit strange for some seconds (I forgot to say). – nastys May 27 '14 at 16:23
This is what happened before entering the remove command. and I tried to reset all the changes, but that too failed and removed all the top bar and launcher. Finally I reset it using unity-tweak-tool --reset-all – Danny Archer May 27 '14 at 16:24

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