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Hi,

After I originally installed leopard on my XPS m1530 (synaptics), the trackpad was fine, albeit no scrolling. Then I used the Dell Laptop Post-Installer by sonotone to install the XPS M1530 trackpad drivers. This allowed tap-to-click and two-finger scrolling, but the scrolling was very jerky.

 

I tried a couple fixes - first, I tried getting sidebar-scrolling by modifying ApplePS2Controller.kext/ApplePS2Trackpad.kext, but this only caused the trackpad to become *extremely* sensitive, without fixing the scrolling. So after reverting this (by re-installing drivers from Dell Post-Installer), I edited com.apple.driver.ApplePS2Trackpad.plist with some settings involving z threshold etc., and this in fact *fixed* the jerkiness, and everything was working perfectly.

 

At some point, after several power cycles, suddenly the super-sensitivity has come back, except that there is no jerkiness in scrolling now. However, running the Dell post-installer no longer seems to revert the trackpad to its original state! Upon inspection, com.apple.driver.ApplePS2Trackpad.plist is indeed reverted to its original settings, but I still have the super-sensitive but non-jerky-scrolling touchpad.

 

Does anyone have any idea what's wrong, and what I can do to fix it?

 

P.S.: I can't just set sensitivity lower in system preferences, because for some reason this completely kills mouse acceleration, thus making the trackpad nearly unuseable anyway.

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