Scrolling with touchpad combines smooth and rough movement
Submitted by Egmont Koblinger
Forwarding from https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=843642:
"When scrolling in Gnome Terminal using a high resolution method like two-finger scroll on a touchpad or button scroll with a trackpoint, for every few lines of smooth movement, there is a jump of another few lines. The expected behaviour would be one or the other, preferably smooth scrolling, but not both.
I speculate that Gnome Terminal reacts to both real XInput 2.1 scroll events and emulated button 4-7 events.
[snip] ii gnome-terminal-data 3.22.0-3 ii libgtk-3-0 3.22.2-1 ii libvte-2.91-0 0.46.0-1"
Also the same as https://sourceforge.net/p/roxterm/bugs/127/:
"GTK3's smooth scrolling (which is available on e.g. touchpads) causes the view to jump.
Every 5 lines that are scrolled smoothly, it jumps ahead an additional 4-5 lines. i.e. the progression is 1-1-1-1-4-1-1-1-1-4 which is not very smooth at all."