Fix slowing CPU

sudo nano /etc/X11/xorg.conf.d/20-intel.conf 

Section "Device"
  Identifier "Intel Graphics"
  Driver "Intel"
  Option "AccelMethod" "sna" 
  Option "TearFree" "true"
  Option "TripleBuffer" "true"
  Option "MigrationHeuristic" "greedy"
  Option "Tiling" "true"
  Option "Pageflip" "true"
  Option "ExaNoComposite" "false"
  Option "Tiling" "true"
  Option "Pageflip" "true"
  Option "VSync" "false"
EndSection

1. Install drivers (http://support.displaylink.com/knowledgebase/articles/684649-how-to-install-displaylink-software-on-ubuntu)

2. Disable secure boot

3. Create file:

   $ vi /usr/share/X11/xorg.conf.d/10-intel.conf

Paste This:

    Section "Device"
        Identifier  "Intel"
        Driver      "intel"
        Option      "VSync" "false"
    EndSection

Best Solution:

$ cat /etc/X11/xorg.conf.d/20-intel.conf
Section "Device"
    Identifier "Intel Graphics"
    Driver "Intel"
    Option "AccelMethod" "sna"
    Option "TearFree" "true"
    Option "TripleBuffer" "true"
    Option "MigrationHeuristic" "greedy"
    Option "Tiling" "true"
    Option "Pageflip" "true"
    Option "ExaNoComposite" "false"
    Option "Tiling" "true"
    Option "Pageflip" "true"
    Option "VSync" "false"
EndSection

1. Reboot

2. CPU decreasing compiz https://askubuntu.com/questions/689602/disable-all-visual-effects-in-ubuntu-15-10