1.  xserver = {
  2.       enable = true;
  3.       layout = "us";
  4.  
  5.       # KDE Desktop Environment.
  6.       desktopManager.kde4.enable = true;
  7.  
  8.       # Touchpad
  9.       synaptics = {
  10.         enable = true;
  11.         tapButtons = false;
  12.         twoFingerScroll = true;
  13.         minSpeed = "0.75";
  14.         maxSpeed = "5.5";
  15.         accelFactor = "0.015";
  16.         palmDetect = true;
  17.         palmMinWidth = 3;
  18.         scrollDelta = 65;
  19.         };
  20.        
  21.     };