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[Miguel Negrao <494292@xxxxxxxxxxxxxxxxxx>]

*** This bug is a duplicate of bug 240738 ***
    https://bugs.launchpad.net/bugs/240738

On my macbook pro 8,2 this fixed it:

    xinput set-prop 10 "Synaptics Palm Detection" 1

and just to be on the safe side I also turn off the tap:

    xinput set-prop 10 "Synaptics Tap Action" 0

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https://bugs.launchpad.net/bugs/494292

Title:
  'Disable Trackpad while typing...' option ignored on Macbook Pro 5,2

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  This bug originally exhibited itself as: Macbook Pro 5,2 trackpad
  spurious input, jumps to horizontal screen edges

  While typing the mouse occasionally jumps horizontally to the edge of
  the screen.  It is not consistent which edge it jumps to.  I notice
  this due to xmouse.

  I believe this is due to the touchpad being overly sensitive.  By
  tapping the very edges of the trackpad (similar to how my palms might
  touch the trackpad while typing) I am able to sporadically reproduce
  this behavior.  As such, I believe that this can best be fixed by the
  trackpad driver either watching for this kind of behavior while
  typing, or the 'Disable touchpad while typing' option (which I have
  enabled) having an increased timeout.

  Actually, now that I test this, I'm able to use the touchpad while
  holding down keys on the keyboard.  This bug should almost certainly
  be applied against the maintainer of that package, as that option is
  not respected on this laptop.

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