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
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You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xorg in Ubuntu.
https://bugs.launchpad.net/bugs/1278223
Title:
Mouse Flickering after adding 3rd Monitor
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1278223/+subscriptions
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