[Wayland-bugs] [Bug 98733] Touchpad gets a stuck button if used while TrackPoint button is down

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=98733

            Bug ID: 98733
           Summary: Touchpad gets a stuck button if used while TrackPoint
                    button is down
           Product: Wayland
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: libinput
          Assignee: wayland-bugs at lists.freedesktop.org
          Reporter: andersk at mit.edu

I have a ThinkPad Yoga 14 with both a touchpad and physical buttons for the
TrackPoint, and I like to use them at the same time, but recently I’ve found
that this often causes a button to get temporarily stuck in the down state.

Here’s what this looks like in libinput-debug-events (event8 = physical
buttons, event9 = touchpad):

(I rest my finger on the touchpad)
event9  POINTER_MOTION    +1.88s          0.25/  0.00
event9  POINTER_MOTION    +1.89s          0.12/  0.00
(I depress a physical button)
event8  POINTER_BUTTON    +2.00s        BTN_LEFT (272) pressed, seat count: 1
event9  POINTER_BUTTON    +2.00s        BTN_LEFT (272) pressed, seat count: 2
(I pick up my finger from the touchpad; no output)
(I release the physical button)
event8  POINTER_BUTTON    +2.87s        BTN_LEFT (272) released, seat count: 1
(At this point my fingers are not touching anything.)
(I rest my finger on the touchpad, which now finally sends its button release.)
event9  POINTER_BUTTON    +5.69s        BTN_LEFT (272) released, seat count: 0
event9  POINTER_MOTION    +5.76s          0.20/ -0.61
event9  POINTER_MOTION    +5.77s          1.00/ -1.53

I’m using xserver-xorg-input-libinput 0.19.0-1 and libinput10 1.4.3-0ubuntu1 on
Ubuntu 17.04.

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