One thing to note also,<br> I have observed that many people (including myself) out of habit do a quick 'double-tap' on the touchpad for a 'left-click' (which is standard for most US 'typical' laptops).<br>
<br>I've noticed, 8 times out of 10 times touching the keyboard like this, the cursor and sensitively of the touchpad goes 'wacko' (highly technical term, I know. More specifically the 'over-sensitivity' issue:). Especially in the 650 and 653 builds. However, four-finger-salute touchpad-reset typically fixes the problem. <br>
<br>Unfortunately, I am currently running latest joyride (now 1914), and the problem still sporadically happens.<br><br>Might want to see if there is a trend on the last thing that the kids do on the keyboard/touchpad, just before the wild-cursor issues happen. (i.e. double-tap, pushing hard, wiped with cloth, spit on keyboard, PB&J, tears of frustration, broken broccoli, tap with pencil, spilled lama juice, etc)<br>
<br>One idea of a 'control group', would be have different set/group of kids use different pointers.. instead of whole finger..... like their fingernail, hover over pad without touching, different fingers, etc...<br>
<br>Hope that helps,<br>-iXo<br><br><div class="gmail_quote">On Sun, Apr 27, 2008 at 7:50 AM, Bryan Berry <<a href="mailto:bryan.berry@gmail.com">bryan.berry@gmail.com</a>> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
thanks Carol, this instruction for disabling the corner sensitivity is<br>
extremely useful! I may use it in the custom build I roll out, some 3-4<br>
months from now.<br>
<br>
I hope some of the hardware techs at OLPC like Richard Smith can shed<br>
some light on the jumpy touchpad. Rebooting works for me as well but it<br>
really disrupts the learning experience.<br>
<div><div></div><div class="Wj3C7c"><br>
<br>
On Sun, 2008-04-27 at 07:46 -0700, Carol Lerche wrote:<br>
> The touchpad issues were a problem in NYC as well. I noticed that it<br>
> was most problematic with certain kids who were very "touchy"...they<br>
> seemed to always have their hands fiddling with the touchpad. Also<br>
> most common to occur when using paint or colors activity. Only way I<br>
> could clear the problem was rebooting -- the 4 finger salute didn't<br>
> seem to work.<br>
><br>
> On the wiki, this is the instruction for disabling the corner<br>
> sensitivity to bringing up the frame. I haven't tested this myself.<br>
><br>
><br>
><br>
> On Sun, Apr 27, 2008 at 6:39 AM, Arjun Sarwal <<a href="mailto:arjun@laptop.org">arjun@laptop.org</a>><br>
> wrote:<br>
> Bryan,<br>
><br>
> Similar issues were dominant at the India pilot too...<br>
><br>
> On Sun, Apr 27, 2008 at 5:20 PM, Bryan Berry<br>
> <<a href="mailto:bryan.berry@gmail.com">bryan.berry@gmail.com</a>> wrote:<br>
> > Day 3 of the pilots at Bishwamitra and Bashuki and couple of<br>
> issues have<br>
> > come up<br>
> ><br>
> > 1. We are having a lot of trouble w/ jumpy cursors. You<br>
> know where the<br>
> > touchpad behaves erratically. Is there an easy fix to this<br>
> problem?<br>
> ><br>
> > we are using build 703, MP machines, and firmware Q2d14. We<br>
> have the<br>
> > kids hold down the 4 corner buttons as recommended in the<br>
> XO user guide<br>
> > but that doesn't seem to consistently fix the problem.<br>
> ><br>
><br>
><br>
> I thought there was a fix in Update.1 for the jumpy mouse<br>
> bug ?<br>
><br>
> Other than that, we had observed that the touchpad behaved<br>
> differently<br>
> because many kids chose to use a larger/smaller area of their<br>
> fingers.<br>
> Since this is a capacitive touchpad, perhaps that has got<br>
> something to<br>
> do with the amount of finger area in contact, or the amount of<br>
> pressure that one puts (some kids chose to press harder and<br>
> harder on<br>
> the touchpad when they couldn't seem to get the cursor under<br>
> control)<br>
> ?<br>
><br>
> > Dust is an issue at the schools but that can't explain the<br>
> high rate of<br>
> > jumpy cursors. Please assist<br>
> ><br>
><br>
><br>
> We didn't find any direct relation with dust as such.<br>
> Humidity, and<br>
> sweaty fingers, though, did seem to make things consistently<br>
> difficult.<br>
><br>
> > Suggestions?<br>
> ><br>
> > 2. For future reference: In general the kids and teachers<br>
> find it quite<br>
> > confusing when they move the cursor to the corners of the<br>
> screen and the<br>
> > Sugar frame pops up. The kids have learned the top row keys<br>
> very quickly<br>
> > - faster than I thought - and they find the frame popping<br>
> up quite<br>
> > confusing. They have learned to use the frame button<br>
> already.<br>
> ><br>
> > pictures to come and a full write-up, I promise!<br>
><br>
><br>
> Looking forward!<br>
><br>
> Good luck.<br>
> Arjun<br>
><br>
> ><br>
> > Bryan W. Berry<br>
> > Systems Engineer<br>
> > OLE Nepal, <a href="http://www.olenepal.org" target="_blank">http://www.olenepal.org</a><br>
> ><br>
> ><br>
> ><br>
> > _______________________________________________<br>
><br>
> > Devel mailing list<br>
> > <a href="mailto:Devel@lists.laptop.org">Devel@lists.laptop.org</a><br>
> > <a href="http://lists.laptop.org/listinfo/devel" target="_blank">http://lists.laptop.org/listinfo/devel</a><br>
> ><br>
><br>
><br>
><br>
> --<br>
> Arjun Sarwal<br>
> Intern, One Laptop per Child<br>
> Email: <a href="mailto:arjun@laptop.org">arjun@laptop.org</a><br>
> IRC: arjs on <a href="http://irc.freenode.net" target="_blank">irc.freenode.net</a> in #olpc, #olpc-health, #sugar<br>
> Skype: arjunsarwal85<br>
> _______________________________________________<br>
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><br>
><br>
><br>
> --<br>
> "Always do right," said Mark Twain. "This will gratify some people and<br>
> astonish the rest."<br>
<br>
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