#11550 NORM 11.3.1: XO-1.5 finger rolling on touchpad causes cursor position jumps

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#11550: XO-1.5 finger rolling on touchpad causes cursor position jumps
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           Reporter:  martin.langhoff  |       Owner:  reuben                                 
               Type:  defect           |      Status:  new                                    
           Priority:  normal           |   Milestone:  11.3.1                                 
          Component:  hardware         |     Version:  1.5/1.0 Software Build os860 aka 10.1.3
         Resolution:                   |    Keywords:                                         
        Next_action:  diagnose         |    Verified:  0                                      
Deployment_affected:                   |   Blockedby:                                         
           Blocking:                   |  
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Comment(by avatar):

 Replying to [comment:20 pgf]:
 > [ aside:  avatar -- if your name is well known to the olpc community,
 those of us that have conferred haven't figured it out yet.  it would be
 nice to know who you are (if you don't mind!), since you're being so
 helpful.  :-) ]
 Compared to the driver that I've written(which also caused some trouble
 these days), my name is not that [in]famous I guess. :)[[BR]]
 Kidding aside, I'm the author of sentelic.[ch]. I didn't notice that this
 ticket is x86 based until pgf reminds me. I was thinking about if the
 jumpy was a result of abnormal PS/2 reset, which may be triggered by
 psmouse-base if Linux detects there are packet out-of-sync conditions. On
 the other hand, I presume OFW won't do the auto-reset-after-out-of-sync
 trick so this probably is just a pointless guess.[[BR]]
 Given that this condition isn't easy to be reproduced after logging into
 Linux(at least with my ARM based OLPC, Turtle Art doesn't make the pad
 looking bad), I'm wondering about if OFW supports some sort of PS/2 packet
 logging facility such that we can do more observation based on the packets
 flowing between FSP and OFW? For example, something like i8042.debug or
 olpc_keyboard.debug on Linux would be great.

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Ticket URL: <http://dev.laptop.org/ticket/11550#comment:21>
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