Viet (zmg48), it will help immensely if you use the computer the problem is 
reproducible with, file a new report with Ubuntu by first ensuring the package 
xdiagnose is installed, and click the Yes button for attaching additional 
debugging information after running the following from a terminal:
ubuntu-bug xorg

Also, please feel free to subscribe me to it.

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  Mouse Flickering after adding 3rd Monitor

Status in xorg package in Ubuntu:

Bug description:
  If you are having an issue and want it addressed, it is most helpful to file 
a new report. If you were led here by DisplayLink's website, you were led here 
in error as no useful debugging information has been provided by the original 
reporter, which is necessary to root cause, and solve the issue he reported. 
Posting comments about how you think you have the same problem isn't helpful 

  My issues is, after adding a 3rd monitor to Ubuntu 14.04, the mouse
  flickers (or blinks) when the cursor is on monitors one or two, but
  not 3.

  Monitor 1: 1440 x 900 - Laptop's Native Monitor
  Monitor 2: 1920 x 1080 - Laptop's HDMI Port's External Monitor
  Monitor 3: 1024 x 768 - SIIG USB 2.0 to VGA Pro Monitor

  Here's the video card that feeds my laptop's native monitor, monitor 2

  lspci | grep 'VGA\|Display'
  00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset 
Integrated Graphics Controller (rev 07)
  00:02.1 Display controller: Intel Corporation Mobile 4 Series Chipset 
Integrated Graphics Controller (rev 07)

  The 3rd Monitor is powered through a Display Link certified SIIG USB
  2.0 to VGA Pro adapter (A2H1320X1374 - not sure what this number, but
  it is a sticker on back of the device):

  lsusb -tv
  /:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/6p, 480M
      |__ Port 6: Dev 2, If 0, Class=Video, Driver=uvcvideo, 480M
      |__ Port 6: Dev 2, If 1, Class=Video, Driver=uvcvideo, 480M

  [    1.688343] usb 2-1: New USB device found, idVendor=17e9, idProduct=02ee
  [    1.688348] usb 2-1: New USB device strings: Mfr=1, Product=2, 
  [    1.688351] usb 2-1: Product: VGA Display Adapter
  [    1.688353] usb 2-1: Manufacturer: DisplayLink
  [    1.688356] usb 2-1: SerialNumber: 119785

  Additionally, unity-control-center crashes sometimes after I "Restore
  previous settings", after selecting a resolution too high. This
  freezed my laptop, requiring a hard reboot.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: unity-control-center 14.04.1-0ubuntu5
  ProcVersionSignature: Ubuntu 3.13.0-8.27-generic 3.13.2
  Uname: Linux 3.13.0-8-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.13.2-0ubuntu2
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Sun Feb  9 18:43:13 2014
  InstallationDate: Installed on 2014-02-02 (7 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140202)
  SourcePackage: unity-control-center
  UpgradeStatus: No upgrade log present (probably fresh install)

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