[Wayland-bugs] [Bug 100021] Set "Tapping Enabled" by default for "Logitech Rechargeable Touchpad T650"

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=100021

            Bug ID: 100021
           Summary: Set "Tapping Enabled" by default for "Logitech
                    Rechargeable Touchpad T650"
           Product: Wayland
           Version: unspecified
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: libinput
          Assignee: wayland-bugs at lists.freedesktop.org
          Reporter: peter at lekensteyn.nl

According to [1], tapping is disabled by default because of buggy devices. The
Logitech T650 however is an external touchpad for which tapping is an essential
feature that should be enabled by default (there are physical buttons hidden
under the device, but this requires more pressure to trigger).

Note that with older kernel versions (or with newer kernels having
hid_logitech_hidpp.disable_raw_mode=1), tapping is enabled by default because
the device itself emulates mouse clicks.

Function tp_tap_default in src/evdev-mt-touchpad-tap.c needs to be changed to
implement the saner default, but perhaps there are more input devices that
would benefit from the better default?

[1]: https://wayland.freedesktop.org/libinput/doc/latest/tapping.html ->
https://cgit.freedesktop.org/wayland/libinput/commit/?id=2219c12c3aa45b80f235e761e87c17fb9ec70eae

libinput-list-devices output for the device:
Device:           Logitech Rechargeable Touchpad T650
Kernel:           /dev/input/event16
Group:            9
Seat:             seat0, default
Size:             123.13x102.78mm
Capabilities:     pointer 
Tap-to-click:     disabled
Tap-and-drag:     enabled
Tap drag lock:    disabled
Left-handed:      disabled
Nat.scrolling:    disabled
Middle emulation: disabled
Calibration:      n/a
Scroll methods:   *two-finger edge 
Click methods:    *button-areas clickfinger 
Disable-w-typing: enabled
Accel profiles:   none
Rotation:         n/a

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