[Wayland-bugs] [Bug 103947] can't seem to get a usable acceleration profile on T450s trackpoint

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=103947

--- Comment #2 from Nathaniel Smith <njs at pobox.com> ---
Thanks, that's really helpful!

Is it possible to somehow find out what range libinput is using currently? It'd
be interesting to compare against what 'measure trackpoint-range' outputs, to
get a sense of whether it explains the problem.

I did eventually find 'sudo udevadm info --query=all /sys/class/input/eventN',
but it doesn't have any LIBINPUT_ATTR_TRACKPOINT_RANGE entry. I assume that
means it's using the default, but what is that? 100? (My actual range is more
like 50.)

A few minor suggestions, hopefully useful:

Maybe 'measure trackpoint-range' could just print the current value? It would
also be useful if it printed which /sys/class/input/eventN node it was using --
I know there's some easy way to find it but I forget what, so I ended up using
trial and error to find it :-)

It'd also be helpful if 'measure trackpoint-range' printed out the device name
and dmi modalias -- it's not 100% obvious to me how those are supposed to be
put together. I guess that document actually doesn't say how to figure out the
device name string at all.

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