On Tue, Jun 23, 2020 at 06:25:45PM +0200, Denis 'GNUtoo' Carikli wrote: > On Mon, 15 Jun 2020 09:57:35 +1000 > Peter Hutterer <peter.hutterer@xxxxxxxxx> wrote: > > > > Event: time 1585880998.920994, type 3 (EV_ABS), code 57 > > > > (ABS_MT_TRACKING_ID), value 0 Event: time 1585880998.920994, type > > > > 3 (EV_ABS), code 53 (ABS_MT_POSITION_X), value 400 Event: time > > sorry, but this is completely unreadable. Please make sure it's in the > > originally formatting that evtest/evemu/libinput record spit out. > > Thanks. > Indeed. > > I'm sorry about that, I didn't see it while sending the mail. thanks for the log. Basically - the problem is that ABS_MT_TOUCH_MAJOR and ABS_PRESSURE are completely unrelated on the device and the latter has apparently random values. 1585880999.248531 is an event where you go from almost max pressure to 0 without changing touch major. Since pressure is more common, you'll have to expect that userspace may ignore major/minor and handle pressure instead where available. Doubly so since historically the major/minor value range has been completely random while pressure was at least somewhat predictable. In this sequence, your touch major ranges from 4-14 despite the axis range being 0-255. Historically, pressure has also been used as equivalent to touch size, so decoupling touch size and pressure is tricky anyway. Speaking from libinput's POV I would disable ABS_(MT_)PRESSURE in this device since it's not reliable to detect a touch. But then we'd still need a quirk in place to tell us what the possible touch major range could be to make sense of that number. Cheers, Peter > Event: time 1585880999.248531, type 3 (EV_ABS), code 54 (ABS_MT_POSITION_Y), value 1210 > Event: time 1585880999.248531, type 3 (EV_ABS), code 48 (ABS_MT_TOUCH_MAJOR), value 14 > Event: time 1585880999.248531, type 3 (EV_ABS), code 58 (ABS_MT_PRESSURE), value 244 > Event: time 1585880999.248531, type 3 (EV_ABS), code 1 (ABS_Y), value 1210 > Event: time 1585880999.248531, type 3 (EV_ABS), code 24 (ABS_PRESSURE), value 244 > Event: time 1585880999.248531, -------------- SYN_REPORT ------------ > Event: time 1585880999.259798, type 3 (EV_ABS), code 54 (ABS_MT_POSITION_Y), value 1208 > Event: time 1585880999.259798, type 3 (EV_ABS), code 58 (ABS_MT_PRESSURE), value 0 > Event: time 1585880999.259798, type 3 (EV_ABS), code 1 (ABS_Y), value 1208 > Event: time 1585880999.259798, type 3 (EV_ABS), code 24 (ABS_PRESSURE), value 0 > Event: time 1585880999.259798, -------------- SYN_REPORT ------------
