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ibook g4 trackpad is hypersensitive

700 Views 6 Replies Latest reply: Apr 16, 2012 6:03 PM by springbunny RSS
springbunny Calculating status...
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Apr 15, 2012 10:00 PM

I just received a nice iBook G4 800. It only has one flaw: the trackpad works erratically when I turn on Trackpad Gestures > Clicking. Even though I selected "ignore accidental trackpad input" it still is odd. If my hands are anywhere NEAR the trackpad while typing, the cursor just flies off somewhere unwanted on the page. It is insanely over sensitive. How can this be fixed? Love the iBook otherwise. Trackpad is better when I turn off Gestures > clicking - however that means I have to use the clicky-button behind the trackpad which plays havoc with my carpal tunnel (and no, I can't use a mouse, I lose feeling in my hand from a mouse.) Help?  (running os 10.4.11  tiger)

Mac OS X (10.4.11), iBook G4 800
  • Kenichi Watanabe Level 7 Level 7 (29,975 points)
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    Apr 15, 2012 11:41 PM (in response to springbunny)

    Did you previously use a non-Apple USB input device, where you had to install a custom device driver (system kernel extension)?  Oh, I guess this iBook is new to you, so you probably don't know...  I'm thinking there may be a driver conflict with the built-in trackpad.

     

    One way you can test for this possibility is to start up from your Mac OS X installation disc.  When you get to the Installer screen, does the trackpad tracking still act erratically?  If it acts normally, then the problem is somewhere in your currently installed system

     

    If you don't have a Mac OS X installation disc, you can do a more limited test.  Create a new user account (in System Preferences Accounts pane), log out and log in to the new user account.  See if this problem recurs in the new account.  This won't eliminate the possibility of a conflicting device driver, but if it works properly in the new account, that means there is something in your usual user account that is causing this problem.

  • Kenichi Watanabe Level 7 Level 7 (29,975 points)
    Currently Being Moderated
    Apr 16, 2012 12:15 AM (in response to Kenichi Watanabe)

    Thought of a better way, if you don't have a Mac OS X installation disc.  Restart with the Shift key held down.  This starts up in Safe Mode

     

    http://support.apple.com/kb/HT1564

     

    Only required Apple system extensions will load.  So if the trackpad works properly in Safe Mode, there is probably a third-party system extension installed that is causing the problem.

  • Kenichi Watanabe Level 7 Level 7 (29,975 points)
    Currently Being Moderated
    Apr 16, 2012 1:13 PM (in response to springbunny)

    If it has a clean system installed since you received it, it would not be related to a system extension conflict or something running in your user account (unless you installed third-party software since the clean install).

     

    I found this Apple article, with more possibilities (including some things already considered).

     

    http://support.apple.com/kb/TA25889

     

    Three items may be relevant.  One is Reset the Power Manager (PMU), which is this procedure

     

    http://support.apple.com/kb/HT1431

     

    Another is to apply a "teflon" trackpad surface protector, which may make it less sensitive.  The last item is a possible hardware problem.

    I'm going to google to see if there are any sorts of external trackpads that might plug in.

    Have you considered a trackball, such as the large square one made by Kensington.  It seems to be popular with people who don't like the using a mouse due to repetitive stress.

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