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[sgon00 <sgon00@xxxxxxx>]

Same here. Any updates or workarounds? None of the above workarounds works. 
The number of monitors does not matter. I have only two monitors active. The problem still exist. It's about the UGA and two graphic cards. 
For me, browser activities will trigger the mouse cursor flickering problem. And yeah, the flickering only happens in the monitor connected with built-in graphic card, NOT in the monitor connected with UGA.

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https://bugs.launchpad.net/bugs/1278223

Title:
  Mouse Flickering after adding 3rd Monitor

Status in xorg package in Ubuntu:
  Confirmed
Status in xorg package in Fedora:
  Unknown

Bug description:
  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
  (hdmi).

  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

  dmesg
  [    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, SerialNumber=3
  [    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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