Mouse jumps when passing over Unity launcher with three monitor setup

**rahaydenuk** · April 29th, 2012

Hi,

I'm using 12.04, installed yesterday. Have two monitors attached to one nVidia card and another monitor attached to a different card (so a total of three monitors). Since the nVidia driver is so bad(?) (Windows seems to be able to cope fine...), the only configuration that works is having each monitor on a separate XScreen and using Xinerama to create one large desktop (this is bad because Xinerama breaks compiz etc.).

The Unity laucher is on the left of the middle screen. Ideally, it would be on the bottom of the middle screen, but, rather weirdly, it seems this is only an option via a compiz plugin, which, as I mentioned, does not work for me since compiz is broken in my three monitor setup. This would all be liveable if it were not for the fact that everytime I move my mouse pointer right from the leftmost screen to the middle screen, as it passes over the Unity launcher, it jumps to almost the righthand edge of the middle screen.

Any ideas what is going on?

Richard.

**CrazyDymond88** · May 23rd, 2012

I'm having the EXACT same problem in Ubuntu 12.04. Triple Monitors on Nvidia Quadro NVS420, launcher in the middle, every time i pass my mouse over the launcher it sends the mouse pointer to the right monitor. Here's my xorg if anyone knows what's up:

# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings: version 295.33 (buildd@allspice) Fri Mar 30 13:37:33 UTC 2012

Section "ServerLayout"
Identifier "Layout0"
Screen 0 "Screen0" 1920 0
Screen 1 "Screen1" LeftOf "Screen0"
Screen 2 "Screen2" RightOf "Screen0"
InputDevice "Keyboard0" "CoreKeyboard"
InputDevice "Mouse0" "CorePointer"
Option "Xinerama" "1"
EndSection

Section "Files"
EndSection

Section "InputDevice"

# generated from default
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "auto"
Option "Device" "/dev/psaux"
Option "Emulate3Buttons" "no"
Option "ZAxisMapping" "4 5"
EndSection

Section "InputDevice"

# generated from default
Identifier "Keyboard0"
Driver "kbd"
EndSection

Section "Monitor"

# HorizSync source: edid, VertRefresh source: edid
Identifier "Monitor0"
VendorName "Unknown"
ModelName "DELL P2411H"
HorizSync 30.0 - 83.0
VertRefresh 56.0 - 76.0
Option "DPMS"
EndSection

Section "Monitor"

# HorizSync source: edid, VertRefresh source: edid
Identifier "Monitor1"
VendorName "Unknown"
ModelName "DELL P2412H"
HorizSync 30.0 - 83.0
VertRefresh 56.0 - 76.0
Option "DPMS"
EndSection

Section "Monitor"
Identifier "Monitor2"
VendorName "Unknown"
ModelName "DELL P2411H"
HorizSync 30.0 - 83.0
VertRefresh 56.0 - 76.0
EndSection

Section "Device"
Identifier "Device0"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "Quadro NVS 420"
BusID "PCI:3:0:0"
Screen 0
EndSection

Section "Device"
Identifier "Device1"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "Quadro NVS 420"
BusID "PCI:3:0:0"
Screen 1
EndSection

Section "Device"
Identifier "Device2"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "Quadro NVS 420"
BusID "PCI:4:0:0"
EndSection

Section "Screen"

# Removed Option "metamodes" "DFP-0: 1920x1080_60_0 +0+0; DFP-0: nvidia-auto-select +0+0"
Identifier "Screen0"
Device "Device0"
Monitor "Monitor0"
DefaultDepth 24
Option "TwinView" "0"
Option "TwinViewXineramaInfoOrder" "DFP-0"
Option "metamodes" "DFP-0: nvidia-auto-select +0+0"
SubSection "Display"
Depth 24
EndSubSection
EndSection

Section "Screen"
Identifier "Screen1"
Device "Device1"
Monitor "Monitor1"
DefaultDepth 24
Option "TwinView" "0"
Option "TwinViewXineramaInfoOrder" "DFP-1"
Option "metamodes" "DFP-1: nvidia-auto-select +0+0"
SubSection "Display"
Depth 24
EndSubSection
EndSection

Section "Screen"
Identifier "Screen2"
Device "Device2"
Monitor "Monitor2"
DefaultDepth 24
Option "TwinView" "0"
Option "TwinViewXineramaInfoOrder" "DFP-0"
Option "metamodes" "nvidia-auto-select +0+0"
SubSection "Display"
Depth 24
EndSubSection
EndSection

Section "Extensions"
Option "Composite" "Disable"
EndSection

**aperry0** · June 5th, 2012

I can confirm this. Three monitors, 2 x NVidia Quadro 4000.

Any ideas?

# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings: version 295.33 (buildd@allspice) Fri Mar 30 15:25:24 UTC 2012

Section "ServerLayout"
Identifier "Layout0"
Screen 0 "Screen0" RightOf "Screen1"
Screen 1 "Screen1" 0 0
Screen 2 "Screen2" RightOf "Screen0"
InputDevice "Keyboard0" "CoreKeyboard"
InputDevice "Mouse0" "CorePointer"
Option "Xinerama" "1"
EndSection

Section "Files"
EndSection

Section "InputDevice"
# generated from default
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "auto"
Option "Device" "/dev/psaux"
Option "Emulate3Buttons" "no"
Option "ZAxisMapping" "4 5"
EndSection

Section "InputDevice"
# generated from default
Identifier "Keyboard0"
Driver "kbd"
EndSection

Section "Monitor"
# HorizSync source: edid, VertRefresh source: edid
Identifier "Monitor0"
VendorName "Unknown"
ModelName "HP LV2311"
HorizSync 24.0 - 94.0
VertRefresh 50.0 - 76.0
Option "DPMS"
EndSection

Section "Monitor"
# HorizSync source: edid, VertRefresh source: edid
Identifier "Monitor1"
VendorName "Unknown"
ModelName "HP LV2311"
HorizSync 24.0 - 94.0
VertRefresh 50.0 - 76.0
Option "DPMS"
EndSection

Section "Monitor"
# HorizSync source: edid, VertRefresh source: edid
Identifier "Monitor2"
VendorName "Unknown"
ModelName "HP LV2311"
HorizSync 24.0 - 94.0
VertRefresh 50.0 - 76.0
Option "DPMS"
EndSection

Section "Device"
Identifier "Device0"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "Quadro 4000"
BusID "PCI:4:0:0"
EndSection

Section "Device"
Identifier "Device1"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "Quadro 4000"
BusID "PCI:5:0:0"
Screen 0
EndSection

Section "Device"
Identifier "Device2"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "Quadro 4000"
BusID "PCI:5:0:0"
Screen 1
EndSection

Section "Screen"
Identifier "Screen0"
Device "Device0"
Monitor "Monitor0"
DefaultDepth 24
Option "TwinView" "0"
Option "TwinViewXineramaInfoOrder" "DFP-1"
Option "metamodes" "1920x1080_60_0 +0+0; nvidia-auto-select +0+0"
SubSection "Display"
Depth 24
EndSubSection
EndSection

Section "Screen"
Identifier "Screen1"
Device "Device1"
Monitor "Monitor1"
DefaultDepth 24
Option "TwinView" "0"
Option "TwinViewXineramaInfoOrder" "DFP-2"
Option "metamodes" "DFP-2: nvidia-auto-select +0+0"
SubSection "Display"
Depth 24
EndSubSection
EndSection

Section "Screen"
Identifier "Screen2"
Device "Device2"
Monitor "Monitor2"
DefaultDepth 24
Option "TwinView" "0"
Option "TwinViewXineramaInfoOrder" "DFP-1"
Option "metamodes" "DFP-1: nvidia-auto-select +0+0"
SubSection "Display"
Depth 24
EndSubSection
EndSection

Section "Extensions"
Option "Composite" "Disable"
EndSection

**m4rci4no** · June 21st, 2012

Had the same problem with two monitors, and a ATI card, and solved it desactivating XINERAMA, now it sticks a second when passing from one monitor to another but I think that's a usability config not a problem.

**grenadecx** · July 18th, 2012

I want to bump this.

I have two graphic cards in my computer, one nvidia geforce GTX 560 Ti and one nvidia geforce 8600 GT.

I have the very same problem with unity. When I move my mouse from the right monitor to the middle and then to the left, it works. When I move it back, from the left to the middle, it jumps to the right monitor.
I have Xinerama enabled. This is only the case with UNITY. When computer starts up to lightdm, it works, after login to unity, it fails. If I use gnome-fallback-session, it also works.

Anyone knows any solution? I'm not a fan of Unity to start with, but if I can't work with it and get used to it without this problem, I might be forced to continue with Linux Mint instead

Edit:
Disable xinerama is not an option for me, I need to be able to work with all monitors, move items/windows and what not across all of them.

**DementedDemigod** · July 19th, 2012

Originally Posted by m4rci4no

Had the same problem with two monitors, and a ATI card, and solved it desactivating XINERAMA, now it sticks a second when passing from one monitor to another but I think that's a usability config not a problem.

Sorry dude, this isn't the same issue. You're dealing with the mouse magnet on the unity launcher which is just a setting for Unity to be turned on or off.

I'm also having the three monitor issue. Mouse travels normally from right to left, skips the middle monitor when travelling left to right.

Running two nVidia cards, GeForce 8800GT and 7600GT according to lspci.

All monitors connected via DVI (left and middle via a KVM, but this doesn't cause any issues in Windows)

Let me know any logs which might be needed to help diagnose.

**rahaydenuk** · May 12th, 2013

*Bump* anyone have any ideas? This has been a problem for a year now...! Or maybe someone can tell me if this is fixed in 13.04 thus making it worth upgrading?