[Olpc-open] jumpy cursor problem and sugar issue
pgf at foxharp.boston.ma.us
Sat May 3 17:19:29 EDT 2008
as a datapoint on touchpad problems, today my XO was showing the
"psychic" behavior -- i could move the cursor with my finger 1/4"
to 1/2" above the surface. it was not particularly "jumpy".
i assume it was fairly humid, given the drizzle in boston today.
i grounded myself to the screw, as described below. there was no
change in the psychic behavior.
i did the four finger salute, and the problem cleared up
(this is a late G1G1 unit.)
> Do you have a way to accurately measure relative humidity?
> On an XO showing jumpy trackpad problems:
> 1. Raise the screen to full vertical / perpendicular.
> 2. Rotate the screen 1/8 turn clockwise (reverse this for left-handers)
> 3. With the right hand palm facing up, reach under the screen and put a
> finger on the metal mounting bracket or screw of the swivel hinge.
> 4. With the finger still in contact with that (essentially a chassis
> ground), lightly brush the trackpad with a finger of the other hand to drain
> stray static charges into the chassis.
> 5. Re-calibrate afterwards, if necessary.
> If you have an available earth ground, discharging to that as well might
> make an interesting variation on the test.
> On Sun, Apr 27, 2008 at 7:50 AM, Bryan Berry <bryan.berry at gmail.com> wrote:
> > Day 3 of the pilots at Bishwamitra and Bashuki and couple of issues have
> > come up
> > 1. We are having a lot of trouble w/ jumpy cursors. You know where the
> > touchpad behaves erratically. Is there an easy fix to this problem?
> > we are using build 703, MP machines, and firmware Q2d14. We have the
> > kids hold down the 4 corner buttons as recommended in the XO user guide
> > but that doesn't seem to consistently fix the problem.
> > Dust is an issue at the schools but that can't explain the high rate of
> > jumpy cursors. Please assist
> > Suggestions?
> > 2. For future reference: In general the kids and teachers find it quite
> > confusing when they move the cursor to the corners of the screen and the
> > Sugar frame pops up. The kids have learned the top row keys very quickly
> > - faster than I thought - and they find the frame popping up quite
> > confusing. They have learned to use the frame button already.
> > pictures to come and a full write-up, I promise!
> > Bryan W. Berry
> > Systems Engineer
> > OLE Nepal, http://www.olenepal.org
> > _______________________________________________
> > Olpc-open mailing list
> > Olpc-open at lists.laptop.org
> > http://lists.laptop.org/listinfo/olpc-open
> Steve Holton
> sph0lt0n at gmail.com
> part 2 text/plain 129
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paul fox, pgf at foxharp.boston.ma.us (arlington, ma, where it's 40.3 degrees)
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