Hi,
I am facing issue in touch. there is offset in finger touch and pointer selection on the GUI.
the pointer also moves on the display when I move the finger but with variable offset. also to open a folder I need to click the location with some offset.
configuration :
Focaltech capacitive touch display
X11 based Linux kernel 5.4 on imx6 dual core
Display resolution : 800X480.
To debug this issue, I have enabled debug message in focaltech driver. and I can see coordinates values are correctly printing of the touched area.
below is Xorg.0.log for the ref.
[ 11.446] (II) config/udev: Adding input device fts_ts (/dev/input/event0)
[ 11.446] (**) fts_ts: Applying InputClass "evdev touchscreen catchall"
[ 11.446] (**) fts_ts: Applying InputClass "libinput touchscreen catchall"
[ 11.446] (II) Using input driver 'libinput' for 'fts_ts'
[ 11.446] (**) fts_ts: always reports core events
[ 11.446] (**) Option "Device" "/dev/input/event0"
[ 11.446] (**) Option "_source" "server/udev"
[ 11.464] (II) event0 - fts_ts: is tagged by udev as: Touchscreen
[ 11.467] (II) event0 - fts_ts: device is a touch device
[ 11.468] (II) event0 - fts_ts: device removed
[ 11.540] (**) Option "config_info" "udev:/sys/devices/soc0/soc/2100000.aips-bus/21a8000.i2c/i2c-2/2-0038/input/input0/event0"
[ 11.540] (II) XINPUT: Adding extended input device "fts_ts" (type: TOUCHSCREEN, id 10)
[ 11.540] (**) Option "AccelerationScheme" "none"
[ 11.540] (**) fts_ts: (accel) selected scheme none/0
[ 11.540] (**) fts_ts: (accel) acceleration factor: 2.000
[ 11.540] (**) fts_ts: (accel) acceleration threshold: 4
[ 11.548] (II) event0 - fts_ts: is tagged by udev as: Touchscreen
[ 11.561] (II) event0 - fts_ts: device is a touch device
[ 23.323] (II) Axis 0x35 value 509 is outside expected range [-24, 504]
See https://wayland.freedesktop.org/libinput/doc/1.14.1/absolute_coordinate_ranges.html for details
please help in resolve this issue.
Regards,
Yogesh
Hi Igor,
Thanks for your reply.
focaltech 5446 driver is fine. as in driver debug info i can see correct coordinates are printing.
i feel some problem in X11 or Libinput side.
i have run xinput_calibrator -v and I touch one point on the screen. following is the output
root@cgtqmx6:~# xinput_calibrator -v
DEBUG: XInputExtension version is 2.3
DEBUG: Skipping virtual master devices and devices without axis valuators.
DEBUG: Skipping device 'Virtual core XTEST pointer' id=4, does not report Absolute events.
DEBUG: Skipping device 'Logitech USB Optical Mouse' id=7, does not report Absolute events.
DEBUG: Selected device: fts_ts
DEBUG: Not usbtouchscreen calibrator: Not a usbtouchscreen device
DEBUG: Not evdev calibrator: Evdev: invalid "Evdev Axis Calibration" property format
Calibrating standard Xorg driver "fts_ts"
current calibration values: min_x=0, max_x=65535 and min_y=0, max_y=65535
If these values are estimated wrong, either supply it manually with the --precalib option, or run the 'get_precalib.sh' script to automatically get it (through HAL).
DEBUG: Found that 'fts_ts' is a sysfs name.
INFO: width=800, height=480
[ 2749.630475] [FTS]point number: 1, touch point: 1
[ 2749.635206] [FTS][B]P0(712, 419)[p:63,tm:6] DOWN!
[ 2749.649056] [FTS]point number: 1, touch point: 1
[ 2749.653718] [FTS][B]P0(712, 419)[p:63,tm:6] DOWN!
[ 2749.666625] [FTS]point number: 1, touch point: 1
[ 2749.671250] [FTS][B]P0(712, 419)[p:63,tm:6] DOWN!
DEBUG: Adding click 0 (X=799, Y=251)
[ 2749.684023] [FTS]point number: 0, touch point: 1
[ 2749.688661] [FTS][B]P0 UP!
[ 2749.691370] [FTS]Points All Up!
here i can see difference in coordinates [FTS][B]P0(712, 419) and click 0 (X=799, Y=251) for same point of touch.
please provide your comments to fix this.
Thanks!
Regards,
Yogesh
Hi,
My problem of offset in touch has been resolved.
earlier device tree settings for focaltech
focaltech,display-coords = <0 0 480 800>;
Changed to
focaltech,display-coords = <0 0 800 480>;
it solved the touch offset problem.
now touch works fine, except X11 menus, touch does not work.
any idea?
Regards,
Yogesh
Hi Yogesh
one can look at focaltech touch configuration in boundary devices boards:
https://boundarydevices.com/1280x800-displays/
Best regards
igor