[Wayland-bugs] [Bug 93948] Pointer doesn't move on rare occasions

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=93948

Peter Hutterer <peter.hutterer at who-t.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |benjamin.tissoires at gmail.co
                   |                            |m, peter.hutterer at who-t.net
             Status|NEW                         |NEEDINFO

--- Comment #1 from Peter Hutterer <peter.hutterer at who-t.net> ---
E: 30.993357 0003 0039 0667     # EV_ABS / ABS_MT_TRACKING_ID   667
E: 30.993357 0003 0035 1202     # EV_ABS / ABS_MT_POSITION_X    1202
E: 30.993357 0003 0036 0530     # EV_ABS / ABS_MT_POSITION_Y    530
E: 30.993357 0001 014a 0001     # EV_KEY / BTN_TOUCH            1
E: 30.993357 0001 0145 0001     # EV_KEY / BTN_TOOL_FINGER      1
E: 30.993357 0003 0000 1202     # EV_ABS / ABS_X                1202
E: 30.993357 0003 0001 0530     # EV_ABS / ABS_Y                530
E: 30.993357 0000 0000 0000     # ------------ SYN_REPORT (0) ----------
+27108ms

That's a finger down in the right bottom corner. The next event is 33 seconds
later:

E: 63.629946 0003 0035 0722     # EV_ABS / ABS_MT_POSITION_X    722
E: 63.629946 0003 0036 0263     # EV_ABS / ABS_MT_POSITION_Y    263
E: 63.629946 0003 0000 0722     # EV_ABS / ABS_X                722
E: 63.629946 0003 0001 0263     # EV_ABS / ABS_Y                263
E: 63.629946 0000 0000 0000     # ------------ SYN_REPORT (0) ----------
+32636ms

So what appears to happen is that that touch was detected as a palm
(correctly). Since it doesn't trigger any of the palm release requirements
(e.g. moving out of the palm zones), it is treated like a palm even when it
starts moving around on the touchpad. This looks like either buggy hardware or
some kernel tracking issue. We could put additional triggers in to prevent this
in libinput, but this is the first time I've seen something like that. Can you
verify this is what's happening every time you see the issue?

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