#5793 NORM Never A: Cursor jumps to screen edge on touch WHEN COLD

[Zarro Boogs per Child]

#5793: Cursor jumps to screen edge on touch WHEN COLD
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 Reporter:  jvance                         |       Owner:  wad           
     Type:  defect                         |      Status:  new           
 Priority:  normal                         |   Milestone:  Never Assigned
Component:  hardware                       |     Version:                
 Keywords:  touchpad temperature hot cold  |    Verified:  0             
 Blocking:                                 |   Blockedby:                
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 Symptom: Cursor follows finger movement accurately until the finger is
 lifted and placed elsewhere on the pad.  At that point, the cursor jumps
 to the screen edge.

 Four fingered salute does not appear to fix it.

 Power down/back up doesn't seem to have any effect.

 Cursor works properly with a USB mouse attached.

 Problem is worst right after bootup, in a cold (18C) room.

 Applying cold (icepack) to the touchpad reliably invokes the problem.
 Tapping on the pad causes the cursor to jump to the edge.

 Applying heat to the touchpad reliably fixes the problem.  Tapping on the
 pad then does not cause the cursor to move.

 This applies to the center (capacitive) portion of the touchpad.  The
 resistive (tablet) portion of the pad does not appear to work at all.

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Ticket URL: <http://dev.laptop.org/ticket/5793>
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