Reply #63 –
For some reason 'Kensington trackball' makes me think of the old ADB ones they used to make ( as in, square base, big ball in the center, buttons around it )
That's exactly what it is. Just with (in my case) an additional defective scrollring. You can see some older versions here. This video shows what at least on the outside looks exactly the same as the one I've got:
The first comment to that video says:
ya its not the best. first reason is because its a finger ball. who the hell wants to use there [sic] finger. thumb trackballs are the best. that being said the Microsoft optic trackball is the best ever made to this day
That's incorrect. Primarily of course because finger or thumb is a matter of preference rather than objective fact, but what I'm actually referring to is that I use it as a bi-handed thumb-controlled trackball. It's just a finger-controlled ball by default. The clue is whether you use the top or bottom buttons for left & right click.
Here's my xorg.conf:
Identifier "Kensington Trackball"
MatchProduct "Kensington Expert Mouse"
Option "SendCoreEvents" "True"
Option "ButtonMapping" "0 1 2 4 5 6 7 3"
Option "EmulateWheel" "True"
Option "EmulateWheelButton" "1"
I use top left & right for left & right click (default bottom left & right), bottom right for middle click, and bottom left for scrolling.
The actual biggest problem is that the sensor is at the bottom, so any junk can fall right in. This results in something more like a ye olde mouse biweekly cleaning ritual than the months on end you might expect with an optical sensor. The Kensington Kingblade supposedly has the sensor on the side and an exit hole at the bottom to alleviate this issue.
Just last week I fixed a Logitech trackball ( you know, the old, beige, discontinued Trackman variant ) - it had lost one of the tiny steel balls that the big red ball sits on. Found a replacement, now it's back in service.
My wife's Logitech Wireless Trackball M570 is not a slouchy replacement. She had an old beige one (probably called Trackman) which started malfunctioning.