#11363 NORM 1.75-so: XO-1.75 mouse sometimes unusable on boot

Zarro Boogs per Child bugtracker at laptop.org
Tue Dec 6 19:13:21 EST 2011

#11363: XO-1.75 mouse sometimes unusable on boot
           Reporter:  dsd       |       Owner:  saadia       
               Type:  defect    |      Status:  assigned     
           Priority:  normal    |   Milestone:  1.75-software
          Component:  kernel    |     Version:  not specified
         Resolution:            |    Keywords:               
        Next_action:  diagnose  |    Verified:  0            
Deployment_affected:            |   Blockedby:               
           Blocking:            |  

Comment(by pgf):

 i have two C1 machines which exhibit this issue repeatedly.  it can be
 reliably reproduced with repeated "modprobe -r psmouse; modprobe psmouse"
 operations, which cause a high volume of bidirectional mouse traffic.
 when the problem hits, the mouse effectively locks up, and will apparently
 not respond to any more commands.  both machines have AVC touchpads.

 working with one of these machines, it seems that running q4c04 (and ec
 0.3.04) has a _much_ lower occurrence rate for the problem than running
 q4c05/0.3.05.  nothing jumps out at me from the changes in either the
 OFW/CForth changelogs, or in the EC changelog.  unfortunately, the earlier
 firmware isn't completely free of the bad behavior -- it's just much
 harder to provoke (though i'd love corroboration of this.)

 another interesting symptom, presumably related to bad communication with
 the mouse, is that the touchpad is sometimes misidentified.  correct
 identification looks like:
 FSPPS/2 Sentelic FingerSensingPad
 but it may become
 ImExPS/2 Sentelic FingerSensingPad
 PS/2 Sentelic FingerSensingPad
 PS/2 Generic Mouse

 also, my two pads identify differently:
  Finger Sensing Pad, hw: 13.2.100, sw: 1.0.0-K, buttons: 4
  Finger Sensing Pad, hw: 13.2.1, sw: 1.0.0-K, buttons: 4

Ticket URL: <http://dev.laptop.org/ticket/11363#comment:8>
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