One thing to note also, 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).
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. Unfortunately, I am currently running latest joyride (now 1914), and the problem still sporadically happens. 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) 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... Hope that helps, -iXo On Sun, Apr 27, 2008 at 7:50 AM, Bryan Berry <[EMAIL PROTECTED]> wrote: > thanks Carol, this instruction for disabling the corner sensitivity is > extremely useful! I may use it in the custom build I roll out, some 3-4 > months from now. > > I hope some of the hardware techs at OLPC like Richard Smith can shed > some light on the jumpy touchpad. Rebooting works for me as well but it > really disrupts the learning experience. > > > On Sun, 2008-04-27 at 07:46 -0700, Carol Lerche wrote: > > The touchpad issues were a problem in NYC as well. I noticed that it > > was most problematic with certain kids who were very "touchy"...they > > seemed to always have their hands fiddling with the touchpad. Also > > most common to occur when using paint or colors activity. Only way I > > could clear the problem was rebooting -- the 4 finger salute didn't > > seem to work. > > > > On the wiki, this is the instruction for disabling the corner > > sensitivity to bringing up the frame. I haven't tested this myself. > > > > > > > > On Sun, Apr 27, 2008 at 6:39 AM, Arjun Sarwal <[EMAIL PROTECTED]> > > wrote: > > Bryan, > > > > Similar issues were dominant at the India pilot too... > > > > On Sun, Apr 27, 2008 at 5:20 PM, Bryan Berry > > <[EMAIL PROTECTED]> 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. > > > > > > > > > I thought there was a fix in Update.1 for the jumpy mouse > > bug ? > > > > Other than that, we had observed that the touchpad behaved > > differently > > because many kids chose to use a larger/smaller area of their > > fingers. > > Since this is a capacitive touchpad, perhaps that has got > > something to > > do with the amount of finger area in contact, or the amount of > > pressure that one puts (some kids chose to press harder and > > harder on > > the touchpad when they couldn't seem to get the cursor under > > control) > > ? > > > > > Dust is an issue at the schools but that can't explain the > > high rate of > > > jumpy cursors. Please assist > > > > > > > > > We didn't find any direct relation with dust as such. > > Humidity, and > > sweaty fingers, though, did seem to make things consistently > > difficult. > > > > > 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! > > > > > > Looking forward! > > > > Good luck. > > Arjun > > > > > > > > Bryan W. Berry > > > Systems Engineer > > > OLE Nepal, http://www.olenepal.org > > > > > > > > > > > > _______________________________________________ > > > > > Devel mailing list > > > [EMAIL PROTECTED] > > > http://lists.laptop.org/listinfo/devel > > > > > > > > > > > -- > > Arjun Sarwal > > Intern, One Laptop per Child > > Email: [EMAIL PROTECTED] > > IRC: arjs on irc.freenode.net in #olpc, #olpc-health, #sugar > > Skype: arjunsarwal85 > > _______________________________________________ > > Devel mailing list > > [EMAIL PROTECTED] > > http://lists.laptop.org/listinfo/devel > > > > > > > > -- > > "Always do right," said Mark Twain. "This will gratify some people and > > astonish the rest." > > _______________________________________________ > Devel mailing list > [EMAIL PROTECTED] > http://lists.laptop.org/listinfo/devel >
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