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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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)
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