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I am having some issues with my Dell T630 server with 288GB of RAM 16 core processor and 2 GB of Matrox G200 Graphics. Ubuntu just runs horribly.

Every window I open just lags while opening. I've already tried to to turn off window animation using Unity, but Unity doesn't seem to apply any changes that I make.

Ubuntu is practically unusable at this point. Can anyone help me with these issues?

Information about my graphics setup (inxi -G):

Card:           Matrox Systems G200eR2 
X.Org:          1.15.1 
drivers:        mga (unloaded: fbdev,vesa) 
Resolution:     1440x900@60.0hz 
GLX Renderer:   Gallium 0.4 on llvmpipe (LLVM 3.4, 256 bits) 
GLX Version:    2.1 Mesa 10.1.3
  • From a terminal (CTRL+ALT+T) or TTY (CTRL+ALT+F1; back to GUI with CTRL+ALT+F7), you could run sudo apt-get install inxi and then post the output of inxi -G by editing your question. That will show some more information about your used graphics card and driver, which I think is the problem's cause. – Byte Commander Sep 14 '15 at 9:34
  • This what it shows after the inxi -G command <br/> Graphics: Card: Matrox Systems G200eR2 X.Org: 1.15.1 drivers: mga (unloaded: fbdev,vesa) Resolution: 1440x900@60.0hz GLX Renderer: Gallium 0.4 on llvmpipe (LLVM 3.4, 256 bits) GLX Version: 2.1 Mesa 10.1.3 – Manojkumar K Sep 15 '15 at 9:00
  • Use the following command to fix this issue 1.switch to console mode: Alt+Ctrl+F1 2.kill x server: sudo service lightdm stop 3.generate new xorg.conf file: sudo X -configure -- this will create xorg.conf.new file in your current dir 4.rename and move: sudo mv xorg.conf.new /etc/X11/xorg.conf 5.open /etc/X11/xorg.conf, replace the graphic driver of 'mga' with 'vesa' 6.return to GUI: sudo start lightdm – Manojkumar K Sep 15 '15 at 10:17
  • Please don't write this as comment. Write it as answer instead and accept it afterwards, as it solved your problem. That way future readers with a similar problem may also profit from, your solution. Thank you! – Byte Commander Sep 15 '15 at 10:22
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Use the following command to fix this issue

  1. Switch to console mode (TTY1):

    Alt+Ctrl+F1

  2. Kill lightdm service:

    sudo service lightdm stop 
    
  3. Generate new xorg.conf.new file in the current directory:

    sudo X -configure 
    
  4. Move and rename the file:

    sudo mv xorg.conf.new /etc/X11/xorg.conf 
    
  5. Open /etc/X11/xorg.conf, replace the graphic driver mga with vesa

  6. Return to GUI:

    sudo start lightdm
    
  • Does sudo service lightdm stop kill the x server? It stops the lightdm service, which I think is not the same... – Byte Commander Sep 16 '15 at 8:57
  • I dont think it kills the X server. but the lagging issues with the GUI works fine after changing the config file – Manojkumar K Sep 17 '15 at 7:17
  • But you wrote that it kills the x server as step #2... Maybe you should look that up again? – Byte Commander Sep 17 '15 at 8:10
  • Ya it is not killing the X server, it just stops the dmservice – Manojkumar K Sep 18 '15 at 5:29

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