Hi, xorg-server 2:1.13.0-0ubuntu6.5 fixes the issue. Thanks!

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https://bugs.launchpad.net/bugs/1212123

Title:
  Erratic cursor movement when using "Coordinate Transformation Matrix"

Status in “xorg-server” package in Ubuntu:
  Fix Released
Status in “xorg-server-lts-quantal” package in Ubuntu:
  Invalid
Status in “xorg-server-lts-quantal” source package in Precise:
  In Progress
Status in “xorg-server” source package in Quantal:
  Fix Committed

Bug description:
  [Impact]

  coordinate mapping is off when using a transformation matrix, needs an
  upstream patch to fix

  [Test case]

  1. Boot into Ubuntu 12.04.2 live system

  2. Expand the laptop display to the external one.
  For example, `xrandr --output eDP1 --auto --output HDMI1 --auto --right-of 
eDP1`

  3. Restrict the movements of the touchscreen to the laptop display.
  For example, `xinput map-to-crtc 'ELAN Touchscreen' eDP1`

  P.S. `xinput map-to-crtc` will calculate and set "Coordinate
  Transformation Matrix" correspondingly.

  = Expected Result =

  I can operate the touchscreen on the laptop display as usual.

  = Actual Result =

  It becomes abnormal and shows erratic cursor movement.

  P.S. Ubuntu 13.04 is OK.

  [Regression potential]

  slim, this has been upstream since 1.13.2

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