On Sat, Sep 24, 2016 at 01:29:39PM -0400, Martin Brandenburg wrote: > The IBM/Lenovo ScrollPoint mouse is uses a TrackPoint-type mechanism > rather than a standard mouse wheel. It appears to the system as a > standard USB mouse with one caveat. > > (http://www.ibmfiles.com/pages/scrollpoint.htm) > > Where a standard USB mouse with a scrollwheel reports one click of the > wheel as 1 unit in the z direction, this one measures force and reports > a number from 1 to 64. It is VERY sensitive. Practically any force at > all will send it into double-digits range. Scrolling at ten to sixty > times normal speed is not pleasant. > > IBM/Lenovo makes/made a driver for Microsoft Windows which lowered the > scrolling speed. > > This divides the reported scroll movement by 16, giving a range from 1 > to 4. I have been using this for over a year and find this comfortable. > > Martin >
I happen to have one of these mouses, so I just tried out your diff and it works as expected. The comment for HIDMS_FASTSCROLL is wrong, but the rest makes sense to me. Hopefully, someone more experienced will chime in.
