Hi guys I have the same issue, with only 2 screens (native one on the laptop, and the displaylink usb). When the displaylink is connected the laptop screen's mouse cursor flashes everytime there is an update on the displaylink. Making a full white screen with no changes causes a 1/per second flash, and playing a video makes the mouse pretty much disappear. Odd thing is the usb screen is completely normal and unaffected by any flashing.
And just to be clear, unplugging the usb, prevents the flashing too. I suspect that the displaylink usb screen card makes unity go into some kind of "safe update" mode where it hides the mouse cursor whule drawing updates.. wolfen@wolfen-HP:~$ lsusb -tv /: Bus 04.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/6p, 5000M /: Bus 03.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/14p, 480M |__ Port 1: Dev 2, If 0, Class=Human Interface Device, Driver=usbhid, 12M |__ Port 2: Dev 3, If 0, Class=Vendor Specific Class, Driver=udl, 480M |__ Port 3: Dev 7, If 0, Class=Vendor Specific Class, Driver=usbfs, 480M |__ Port 3: Dev 7, If 1, Class=Vendor Specific Class, Driver=, 480M |__ Port 7: Dev 4, If 0, Class=Video, Driver=uvcvideo, 480M |__ Port 7: Dev 4, If 1, Class=Video, Driver=uvcvideo, 480M |__ Port 13: Dev 5, If 0, Class=Human Interface Device, Driver=usbhid, 12M |__ Port 14: Dev 6, If 0, Class=Vendor Specific Class, Driver=, 12M /: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/2p, 480M |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/8p, 480M /: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/2p, 480M |__ Port 1: Dev 2, If 0, Class=Hub, Dwolfen@wolfen-HP:~$ cat /etc/issue Ubuntu 14.04 LTS \n \l river=hub/6p, 480M wolfen@wolfen-HP:~$ lspci | grep -i vga 00:02.0 VGA compatible controller: Intel Corporation 4th Gen Core Processor Integrated Graphics Controller (rev 06) wolfen@wolfen-HP:~$ cat /etc/issue Ubuntu 14.04 LTS \n \l -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1278223 Title: Mouse Flickering after adding 3rd Monitor Status in “xorg” package in Ubuntu: Confirmed 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) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1278223/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp