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So after a system upgrade I'm faced with trackpoint sensitivity that's way too high.
How do I approach the problem? Where are the values I could tweak to see how it works?
The only promising entry in xinput --list-props for the device is Coordinate Transformation Matrix (140) but changing it, even zeroing it out, does not seem to affect anything.
The laptop is Dell E5470 and I believe the same problem is described here:
https://superuser.com/questions/1184447 … h-libinput
https://bugs.launchpad.net/ubuntu/+sour … ug/1686155
There are some links there to hwdb but those apparently rely on me knowing some magic values. Which I don't.
Trackpoint has been working well (maybe even a bit too slow actually) until I think one of these upgrades:
[2017-05-05 20:31] [ALPM] upgraded libinput (1.5.3-1 -> 1.7.2-1)
[2017-05-05 20:32] [ALPM] upgraded xf86-input-libinput (0.22.0-1 -> 0.25.1-1)
(I did not reboot back then so it's a bit tricky to figure out now)
xf86-input-evdev has never been installed on this system.
The problem may not even be the sensitivity as such, it's more like the cut-off threshold is too high. I can control the pointer with enough precision while it's moving but the force required to start the movement is so high relatively it immediately jumps 20-30 pixels.
Last edited by axs (2017-06-07 12:19:24)
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Never mind, I'm stupid. That's the wrong kind of matrix. Ratios are important, not the values themselves.
xinput --set-prop 12 140 0.4 0 0 0 0.4 0 0 0 1.0Last edited by axs (2017-06-07 12:16:15)
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