With Clickfinger behavior, pointer movement briefly turns into a scroll when a thumb is dropped onto the pad
Submitted by Nate Graham
Assigned to Wayland bug list
Created attachment 128740 Clickfinger behavior: pointer movement briefly turns into a scroll when a thumb is dropped onto the pad
Hardware: HP Spectre x360 with a Synaptics clickpad Software: Fedora 25 + GNOME 3.22 + libinput built from git master as of today
- With your thumb hovering over the pad, Place an index finger on the pad and start moving it
- While it's still moving, drop your thumb on bottom part of the pad in the "ignored" area
With the "areas" behavior, this works fine and the pointer continues moving as expected even as the thumb hits the bottom of the pad and rests in one place (to click, presumably).
With the "clickfinger" behavior, as soon as the thumb hits the pad, the cursor jarringly stops moving and your finger movement is mis-interpreted as a two-finger scroll. Sometimes after half a second it seems to realize that this was a mistake, it stops scrolling and returns to pointer motion. I have attached evemu recordings that document the issue.
If resolving this issue is dependent on RMI4 support in Kernel 4.10, I have that on my machine and 4.10 is just around the corner, with 4.10-rc2 already out in the wild.
Attachment 128740, "Clickfinger behavior: pointer movement briefly turns into a scroll when a thumb is dropped onto the pad":