[Wayland-bugs] [Bug 99267] Cursor resolution/refresh rate decreases when a thumb is resting on the pad, especially with clickfinger behavior

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=99267

            Bug ID: 99267
           Summary: Cursor resolution/refresh rate decreases when a thumb
                    is resting on the pad, especially with clickfinger
                    behavior
           Product: Wayland
           Version: 1.5.0
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: wayland
          Assignee: wayland-bugs at lists.freedesktop.org
          Reporter: pointedstick at zoho.com

Created attachment 128736
  --> https://bugs.freedesktop.org/attachment.cgi?id=128736&action=edit
evemu recording of drawing circles with a thumb on the pad with clickfinger,
showing decreased resolution

Hardware: HP Spectre x360 with a Synaptics clickpad
Software: Fedora 25 + GNOME 3.22 + libinput built from git master  as of today

My touchpad's apparent resolution seems to be reduced when a thumb is rested on
the touchpad. When I draw small circles on the pad with only my pointer finger,
the refresh rate appears high, and the pointer seems to be moving at like 60
hz, or as fast as the screen can re-draw it. When I do the same with a thumb on
the bottom of the pad, the apparent refresh rate slows down to something
looking more like 20 hz.

This is extremely noticeable with the "clickfinger" behavior. Less so with
"areas', but still observable if you're looking for it.

If this is dependent on RMI4 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.

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