https://bugs.freedesktop.org/show_bug.cgi?id=104080
Bug ID: 104080
Summary: extra straight line when drawing with stylus
Product: Wayland
Version: unspecified
Hardware: Other
OS: All
Status: NEW
Severity: normal
Priority: medium
Component: libinput
Assignee: wayland-bugs@lists.freedesktop.org
Reporter: ca...@caione.org
Hardware is an old Positivo EC10IS1 laptop with a touchscreen on the USB bus:
ID 22b9:0005 eTurboTouch Technology, Inc.
the bug is the same as https://bugs.freedesktop.org/show_bug.cgi?id=82250.
That bugzilla entry is not valid anymore since I'm using libinput and not evdev
but the wrong behaviour is the same (copy and pasting from that story):
> When using my pen in drawing programs (I tried gimp and mypaint), if draw
> something on the left side (for example), raise the pen from the screen,
> and draw something on e right side, there is a straight line drawn from the
> last point I touched on the left to the first point I touch on the right.
The GDK bug https://bugzilla.gnome.org/show_bug.cgi?id=735003 is still open but
I'm not sure if it is possible to fix this on the libinput side.
This is the evtest output I get when I touch the touchscreen with the stylus,
draw a line and then raise the pen again:
Event: time 1512412889.394868, type 4 (EV_MSC), code 4 (MSC_SCAN), value d0042
Event: time 1512412889.394868, type 1 (EV_KEY), code 330 (BTN_TOUCH), value 1
Event: time 1512412889.394868, type 1 (EV_KEY), code 320 (BTN_TOOL_PEN), value
1
Event: time 1512412889.394868, type 3 (EV_ABS), code 0 (ABS_X), value 1328
Event: time 1512412889.394868, type 3 (EV_ABS), code 1 (ABS_Y), value 2941
Event: time 1512412889.394868, -------------- EV_SYN ------------
Event: time 1512412889.399326, type 3 (EV_ABS), code 0 (ABS_X), value 1326
Event: time 1512412889.399326, type 3 (EV_ABS), code 1 (ABS_Y), value 2949
Event: time 1512412889.399326, -------------- EV_SYN ------------
Event: time 1512412889.409335, type 3 (EV_ABS), code 0 (ABS_X), value 1325
Event: time 1512412889.409335, type 3 (EV_ABS), code 1 (ABS_Y), value 2963
Event: time 1512412889.409335, -------------- EV_SYN ------------
...
Event: time 1512412889.624330, -------------- EV_SYN ------------
Event: time 1512412889.629329, type 3 (EV_ABS), code 0 (ABS_X), value 1871
Event: time 1512412889.629329, type 3 (EV_ABS), code 1 (ABS_Y), value 2399
Event: time 1512412889.629329, -------------- EV_SYN ------------
Event: time 1512412889.650334, type 4 (EV_MSC), code 4 (MSC_SCAN), value d0042
Event: time 1512412889.650334, type 1 (EV_KEY), code 330 (BTN_TOUCH), value 0
Event: time 1512412889.650334, type 1 (EV_KEY), code 320 (BTN_TOOL_PEN), value
0
Event: time 1512412889.650334, -------------- EV_SYN ------------
Some more info on the touchscreen:
P:
/devices/pci0000:00/0000:00:1d.2/usb4/4-2/4-2:1.0/0003:22B9:0005.0001/input/input10/event5
N: input/event5
S: input/by-id/usb-HID_TOUCH_HID_Touch_Panel-event-mouse
S: input/by-path/pci-0000:00:1d.2-usb-0:2:1.0-event-mouse
E: DEVLINKS=/dev/input/by-path/pci-0000:00:1d.2-usb-0:2:1.0-event-mouse
/dev/input/by-id/usb-HID_TOUCH_HID_Touch_Panel-event-mouse
E: DEVNAME=/dev/input/event5
E:
DEVPATH=/devices/pci0000:00/0000:00:1d.2/usb4/4-2/4-2:1.0/0003:22B9:0005.0001/input/input10/event5
E: ID_BUS=usb
E: ID_INPUT=1
E: ID_INPUT_TOUCHSCREEN=1
E: ID_MODEL=HID_Touch_Panel
E: ID_MODEL_ENC=HID\x20Touch\x20Panel
E: ID_MODEL_ID=0005
E: ID_PATH=pci-0000:00:1d.2-usb-0:2:1.0
E: ID_PATH_TAG=pci-0000_00_1d_2-usb-0_2_1_0
E: ID_REVISION=0000
E: ID_SERIAL=HID_TOUCH_HID_Touch_Panel
E: ID_TYPE=hid
E: ID_USB_DRIVER=usbhid
E: ID_USB_INTERFACES=:030000:
E: ID_USB_INTERFACE_NUM=00
E: ID_VENDOR=HID_TOUCH
E: ID_VENDOR_ENC=HID\x20TOUCH
E: ID_VENDOR_ID=22b9
E: LIBINPUT_DEVICE_GROUP=3/22b9/5/101:usb-0000:00:1d.2-2
E: MAJOR=13
E: MINOR=69
E: SUBSYSTEM=input
E: USEC_INITIALIZED=28633518
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