T480s Trackpoint drifts

[Kai Hendry]

On Tue, 20 Mar 2018, at 12:05 PM, Peter Hutterer wrote:
> what exactly is drift in this context? it moves on its own to the edge of
> the screen?

It generally just moves diagonally south west for about a cm. Sometimes all the way to the bottom left. Initially I googled around and people said it was "re-calibrating"..

> As for the drifting, is this something on your device only or a general
> issue affecting this class of devices? Try playing around with the knobs 
> in 
> /sys/class/input/event18/device/device (replace event18 with your event 
> node number)

Which knobs? Is there a guide?

> run libinput measure trackpoint-range and go from there, it's likely that
> you need a custom range for that device. And the speed setting can be
> changed, I'm having a hard time believing that at the lowest speed setting
> it's still too fast given that it's almost tar-like at that speed on every
> device I've tested.

https://www.youtube.com/watch?v=gDzWBhcOcCY
https://s.natalian.org/2018-03-21/libinput.txt

> did you try changing the touchpad speed settings?

How do I do that? xinput?

Many thanks,