Hi,
After calibrating , I can touch almost points correctly.But when I touch
some edge points of the touchscreen the weston crash.
The method of calibration is:
1.$libinput-list-devides
Device: myts-ft5x0x
Kernel: /dev/input/event0
Group: 3
Seat: seat0, default
Capabilities: touch
Tap-to-click: n/a
Tap-and-drag: n/a
Tap drag lock: n/a
Left-handed: n/a
Nat.scrolling: n/a
Middle emulation: n/a
Calibration: identity matrix
Scroll methods: none
Click methods: none
Disable-w-typing: n/a
Accel profiles: n/a
Rotation: n/a
2.$weston-calibrator
Calibration values: 1.286611 0.085774 -40.799133 -0.015215
1.211107 19.864624
3.Add the .rules file in /etc/udev/rules.d/
$cat /etc/udev/rules.d/touch-calibration.rules
ATTRS{name}=="myts-ft5x0x", ENV{WL_CALIBRATION}="1.286611
0.085774 -40.799133 -0.015215 1.211107 19.864624"
4.$/etc/init.d/udev restart
Using the gdb to debug,I found that:
#0 0x76d9e9c4 in __GI_raise (sig=5) at
../sysdeps/unix/sysv/linux/raise.c:55
#1 <signal handler called>
#2 weston_view_from_global_float (view=0x0, x=-nan(0x7f007c),
y=9.18354962e-41, vx=0x7efff658, vy=0x7efff65c) at
/usr/src/debug/weston/1.9.0-r0/weston-1.9.0/src/compositor.c:1350
#3 0x00012468 in weston_view_from_global_fixed
(view=<optimized out>, x=<optimized out>, y=y@entry=211820,
vx=0x7efff690, vx@entry=0x7efff688, vy=0x7efff694, vy@entry=0x7efff68c)
at
/usr/src/debug/weston/1.9.0-r0/weston-1.9.0/src/compositor.c:1379
#4 0x00016e28 in default_grab_touch_down (grab=<optimized
out>, time=671019, touch_id=0, x=<optimized out>, y=36292) at
/usr/src/debug/weston/1.9.0-r0/weston-1.9.0/src/input.c:248
#5 0x00019988 in notify_touch (seat=<optimized out>,
time=time@entry=671019, touch_id=touch_id@entry=0, x=-4092, y=36292,
touch_type=touch_type@entry=0) at
/usr/src/debug/weston/1.9.0-r0/weston-1.9.0/src/input.c:1582
#6 0x76c93ef0 in handle_touch_with_coords
(libinput_device=libinput_device@entry=0x2b7628, touch_event=0x328f90,
touch_type=touch_type@entry=0) at
/usr/src/debug/weston/1.9.0-r0/weston-1.9.0/src/libinput-device.c:250
#7 0x76c94384 in handle_touch_down (touch_event=<optimized
out>, device=0x2b7628) at
/usr/src/debug/weston/1.9.0-r0/weston-1.9.0/src/libinput-device.c:257
#8 evdev_device_process_event (event=event@entry=0x328f90) at
/usr/src/debug/weston/1.9.0-r0/weston-1.9.0/src/libinput-device.c:320
#9 0x76c93a6c in process_event (event=0x328f90) at
/usr/src/debug/weston/1.9.0-r0/weston-1.9.0/src/libinput-seat.c:161
#10 process_events (input=<optimized out>) at
/usr/src/debug/weston/1.9.0-r0/weston-1.9.0/src/libinput-seat.c:171
#11 0x76c93d14 in udev_input_dispatch (input=0x33b6c) at
/usr/src/debug/weston/1.9.0-r0/weston-1.9.0/src/libinput-seat.c:182
#12 libinput_source_dispatch (fd=<optimized out>,
mask=<optimized out>, data=0x33b6c) at
/usr/src/debug/weston/1.9.0-r0/weston-1.9.0/src/libinput-seat.c:192
#13 0x76fca2e8 in wl_event_loop_dispatch (loop=0x304f0,
timeout=timeout@entry=-1) at
/usr/src/debug/wayland/1.9.0-r0/wayland-1.9.0/src/event-loop.c:422
#14 0x76fc8bb4 in wl_display_run
(display=display@entry=0x30478) at
/usr/src/debug/wayland/1.9.0-r0/wayland-1.9.0/src/wayland-server.c:1004
#15 0x0000f9c0 in main (argc=1, argv=0x7efffdb4) at
/usr/src/debug/weston/1.9.0-r0/weston-1.9.0/src/main.c:818
So when weston_view_from_global_float() access the view which is null,
the weston crash.
At last I found that after calling transform_absolute(device, &x, &y)
which is in libinput's evdev.c,the variable x will change to
negative.Then the weston will consider the view is Null.
Is it the problem of weston-calibrator?
ThankYou
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