troubles with an USB touch screen

To: tech-kern%netbsd.org@localhost
Subject: troubles with an USB touch screen
From: Manuel Bouyer <bouyer%antioche.eu.org@localhost>
Date: Wed, 16 Jul 2014 23:18:57 +0200
Hello,
I have a USB touch screen, which I have trouble getting working
properly (under -current). It reports itself as:
uhidev0 at uhub0 port 1 configuration 1 interface 0
uhidev0: N-trig DuoSense, rev 2.00/21.00, addr 2, iclass 3/0
uhidev0: 10 report ids
uhid at uhidev0 reportid 1 not configured
uhid at uhidev0 reportid 2 not configured
uhid at uhidev0 reportid 3 not configured
uhid at uhidev0 reportid 4 not configured
uhid at uhidev0 reportid 5 not configured
uhid at uhidev0 reportid 6 not configured
uhid at uhidev0 reportid 7 not configured
uhid at uhidev0 reportid 8 not configured
uhid at uhidev0 reportid 9 not configured
uhid at uhidev0 reportid 10 not configured
uhidev1 at uhub0 port 1 configuration 1 interface 1
uhidev1: N-trig DuoSense, rev 2.00/21.00, addr 2, iclass 3/0
uhidev1: 24 report ids
ums0 at uhidev1 reportid 1: 3 buttons digitizer, tip, barrel, eraser
wsmouse0 at ums0 mux 0
uts0 at uhidev1 reportid 2wsmouse1 at uts0 mux 0
uts1 at uhidev1 reportid 3wsmouse2 at uts1 mux 0
uhid at uhidev1 reportid 4 not configured
uhid at uhidev1 reportid 10 not configured
uhid at uhidev1 reportid 11 not configured
uhid at uhidev1 reportid 12 not configured
uhid at uhidev1 reportid 13 not configured
uhid at uhidev1 reportid 14 not configured
uhid at uhidev1 reportid 15 not configured
uhid at uhidev1 reportid 16 not configured
uhid at uhidev1 reportid 17 not configured
uhid at uhidev1 reportid 20 not configured
uhid at uhidev1 reportid 21 not configured
uhid at uhidev1 reportid 23 not configured
uhid at uhidev1 reportid 24 not configured

(BTW, there's a missing \n somewhere :)
With cat | od -x, I can see that only wsmouse1 is producing events,
but that may be different under X11. X11 is using /dev/wsmouse (i.e. the mux).

The touch screen seems to be badly calibrated: touching the upper left
corner seems to properly place the cursor at 0 0, but touching a bit to the
righ or the bottom immediately moves the cursor to the right or the bottom
of the screen (or to the bottom right corner). In addition,
it seems to get events even if I don't touch the screen.

Here's a xev -root output (it's a bare X11 server, no windows) when a tap
close to the upper left corner:
        MotionNotify event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 937301, (54,799), root:(54,799),
            state 0x0, is_hint 0, same_screen YES

        MotionNotify event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 937301, (54,248), root:(54,248),
            state 0x0, is_hint 0, same_screen YES

        ButtonPress event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 937353, (54,248), root:(54,248),
            state 0x0, button 1, same_screen YES

        MotionNotify event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 937506, (54,247), root:(54,247),
            state 0x100, is_hint 0, same_screen YES

        MotionNotify event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 938121, (55,247), root:(55,247),
            state 0x100, is_hint 0, same_screen YES

        MotionNotify event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 938121, (55,246), root:(55,246),
            state 0x100, is_hint 0, same_screen YES

        MotionNotify event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 938326, (55,245), root:(55,245),
            state 0x100, is_hint 0, same_screen YES

        MotionNotify event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 938531, (55,246), root:(55,246),
            state 0x100, is_hint 0, same_screen YES

        MotionNotify event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 938736, (56,246), root:(56,246),
            state 0x100, is_hint 0, same_screen YES

        MotionNotify event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 938736, (56,244), root:(56,244),
            state 0x100, is_hint 0, same_screen YES

        MotionNotify event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 938941, (57,244), root:(57,244),
            state 0x100, is_hint 0, same_screen YES

        MotionNotify event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 938941, (57,243), root:(57,243),
            state 0x100, is_hint 0, same_screen YES


Here's what I get if I drag starting from upper right to bottom left:


        MotionNotify event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 814601, (1279,799), root:(1279,799),
            state 0x0, is_hint 0, same_screen YES

        MotionNotify event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 814601, (1279,218), root:(1279,218),
            state 0x0, is_hint 0, same_screen YES

        ButtonPress event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 814653, (1279,218), root:(1279,218),
            state 0x0, button 1, same_screen YES

        MotionNotify event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 814806, (1279,218), root:(1279,218),
            state 0x100, is_hint 0, same_screen YES

        MotionNotify event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 814806, (1279,226), root:(1279,226),
            state 0x100, is_hint 0, same_screen YES

        MotionNotify event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 815011, (1279,226), root:(1279,226),
            state 0x100, is_hint 0, same_screen YES

        MotionNotify event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 815011, (1279,234), root:(1279,234),
            state 0x100, is_hint 0, same_screen YES

        MotionNotify event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 815216, (1279,234), root:(1279,234),
            state 0x100, is_hint 0, same_screen YES

        MotionNotify event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 815216, (1279,239), root:(1279,239),
            state 0x100, is_hint 0, same_screen YES

        MotionNotify event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 815421, (1279,239), root:(1279,239),
            state 0x100, is_hint 0, same_screen YES

        MotionNotify event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 815421, (1279,248), root:(1279,248),
            state 0x100, is_hint 0, same_screen YES

        MotionNotify event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 815626, (1279,248), root:(1279,248),
            state 0x100, is_hint 0, same_screen YES

        MotionNotify event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 815626, (1279,259), root:(1279,259),
            state 0x100, is_hint 0, same_screen YES

        MotionNotify event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 815831, (1279,259), root:(1279,259),
            state 0x100, is_hint 0, same_screen YES

        MotionNotify event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 815831, (1279,266), root:(1279,266),
            state 0x100, is_hint 0, same_screen YES

        MotionNotify event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 816036, (1279,266), root:(1279,266),
            state 0x100, is_hint 0, same_screen YES

        MotionNotify event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 816036, (1279,267), root:(1279,267),
            state 0x100, is_hint 0, same_screen YES

        MotionNotify event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 816241, (1279,267), root:(1279,267),
            state 0x100, is_hint 0, same_screen YES

        MotionNotify event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 816241, (1279,274), root:(1279,274),
            state 0x100, is_hint 0, same_screen YES

        MotionNotify event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 816446, (1279,274), root:(1279,274),
            state 0x100, is_hint 0, same_screen YES

        MotionNotify event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 816446, (1279,281), root:(1279,281),
            state 0x100, is_hint 0, same_screen YES

        MotionNotify event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 816651, (1279,281), root:(1279,281),
            state 0x100, is_hint 0, same_screen YES

        MotionNotify event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 816651, (1279,287), root:(1279,287),
            state 0x100, is_hint 0, same_screen YES

        MotionNotify event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 816856, (1279,287), root:(1279,287),
            state 0x100, is_hint 0, same_screen YES

        MotionNotify event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 816856, (1279,298), root:(1279,298),
            state 0x100, is_hint 0, same_screen YES

        MotionNotify event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 817061, (1279,298), root:(1279,298),
            state 0x100, is_hint 0, same_screen YES

        MotionNotify event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 817061, (1279,504), root:(1279,504),
            state 0x100, is_hint 0, same_screen YES

        MotionNotify event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 817266, (1279,504), root:(1279,504),
            state 0x100, is_hint 0, same_screen YES

        MotionNotify event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 817266, (1279,739), root:(1279,739),
            state 0x100, is_hint 0, same_screen YES

        MotionNotify event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 817471, (1279,739), root:(1279,739),
            state 0x100, is_hint 0, same_screen YES

        MotionNotify event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 817471, (1279,799), root:(1279,799),
            state 0x100, is_hint 0, same_screen YES

        MotionNotify event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 817676, (1279,799), root:(1279,799),
            state 0x100, is_hint 0, same_screen YES

        MotionNotify event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 817676, (1279,799), root:(1279,799),
            state 0x100, is_hint 0, same_screen YES

        MotionNotify event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 817881, (1279,799), root:(1279,799),
            state 0x100, is_hint 0, same_screen YES

        MotionNotify event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 817881, (1279,799), root:(1279,799),
            state 0x100, is_hint 0, same_screen YES

        ButtonRelease event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 817881, (1279,799), root:(1279,799),
            state 0x100, button 1, same_screen YES

        MotionNotify event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 818086, (1279,799), root:(1279,799),
            state 0x0, is_hint 0, same_screen YES

        MotionNotify event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 818086, (1279,799), root:(1279,799),
            state 0x0, is_hint 0, same_screen YES

        ButtonPress event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 818143, (1279,799), root:(1279,799),
            state 0x0, button 1, same_screen YES

        MotionNotify event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 818291, (1279,799), root:(1279,799),
            state 0x100, is_hint 0, same_screen YES

        MotionNotify event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 818291, (1279,799), root:(1279,799),
            state 0x100, is_hint 0, same_screen YES

        MotionNotify event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 818496, (1279,799), root:(1279,799),
            state 0x100, is_hint 0, same_screen YES

        MotionNotify event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 818496, (1279,799), root:(1279,799),
            state 0x100, is_hint 0, same_screen YES

        ButtonRelease event, serial 18, synthetic NO, window 0xe2,
            root 0xe2, subw 0x0, time 818496, (1279,799), root:(1279,799),
            state 0x100, button 1, same_screen YES

note that X didn't move out of 1279
Any idea what can be done to get this working properly ?

-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--
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