I had the same problem "jumps erratically" if any part of my hand even lightly brushed the mousepad. This is on an HP dv7. The problem with erratic mouse was so bad that it was nearly unusable.
I tried Ivan's fix above -- adding Option "JumpyCursorThreshold" "90" and that solved my problem!!! at least as far as having a usable mouse goes. It still jumps a little but is very acceptable. on the other hand I believe that this mousepad is designed to support multi-touch, but I don't see any apparent multi-touch behaviour??? meanwhile, the RIGHT mouse button continues to not work, but that is a separate bug. -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-input-synaptics in Ubuntu. https://bugs.launchpad.net/bugs/503944 Title: erratic cursor movement with multi touch _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp