Public bug reported:

Binary package hint: xserver-xorg-input-synaptics

apt-cache policy xserver-xorg-input-synaptics
xserver-xorg-input-synaptics:
  Installed: 0.99.3-2ubuntu2
  Candidate: 0.99.3-2ubuntu2
  Version table:
 *** 0.99.3-2ubuntu2 0
        500 http://gb.archive.ubuntu.com jaunty/main Packages
        100 /var/lib/dpkg/status

Sony Vaio VGN FE41Z with an integrated ALPS touchpad:

[   22.574690] input: AlpsPS/2 ALPS GlidePoint as
/devices/platform/i8042/serio4/input/input8

The PC is configured to use two X screens (:0.0 left, :0.1 right). The
primary input device is a Bluetooth mouse which I use all the time when
tethered to the desktop and using the dual screens.

Investigating another user's experiences of changing sensitivity of the
two input devices separately, I was using the touchpad to determine how
much change there is when the gsynaptics sensitivity slider is adjusted.

By chance I dragged the mouse cursor onto screen 1 using the touchpad.
When I tried to drag it back to screen 0 it refused to move beyond the
left edge of screen 1. More testing showed it was trapped on screen 1.

If I use the Bluetooth mouse the cursor returns to screen 0 as expected.
As I said earlier, I always use the mouse when tethered so I'd never
noticed this before.

I'm not entirely sure how this should be debugged so any 'pointers' are
welcome :p

** Affects: xserver-xorg-input-synaptics (Ubuntu)
     Importance: Undecided
         Status: New

** Description changed:

  Binary package hint: xserver-xorg-input-synaptics
  
  apt-cache policy xserver-xorg-input-synaptics
  xserver-xorg-input-synaptics:
    Installed: 0.99.3-2ubuntu2
    Candidate: 0.99.3-2ubuntu2
    Version table:
   *** 0.99.3-2ubuntu2 0
          500 http://gb.archive.ubuntu.com jaunty/main Packages
          100 /var/lib/dpkg/status
  
  Sony Vaio VGN FE41Z with an integrated ALPS touchpad:
  
  [   22.574690] input: AlpsPS/2 ALPS GlidePoint as
  /devices/platform/i8042/serio4/input/input8
  
- The PC is configured to use two X screens (:0.0, :0.1). The primary
- input device is a Bluetooth mouse which I use all the time when tethered
- to the desktop and using the dual screens.
+ The PC is configured to use two X screens (:0.0 left, :0.1 right). The
+ primary input device is a Bluetooth mouse which I use all the time when
+ tethered to the desktop and using the dual screens.
  
  Investigating another user's experiences of changing sensitivity of the
  two input devices separately, I was using the touchpad to determine how
  much change there is when the gsynaptics sensitivity slider is adjusted.
  
  By chance I dragged the mouse cursor onto screen 1 using the touchpad.
  When I tried to drag it back to screen 0 it refused to move beyond the
  left edge of screen 1. More testing showed it was trapped on screen 1.
  
  If I use the Bluetooth mouse the cursor returns to screen 0 as expected.
  As I said earlier, I always use the mouse when tethered so I'd never
  noticed this before.
  
  I'm not entirely sure how this should be debugged so any 'pointers' are
  welcome :p

-- 
Touchpad cursor trapped on screen 1
https://bugs.launchpad.net/bugs/333732
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