https://bugs.freedesktop.org/show_bug.cgi?id=105094
Bug ID: 105094
Summary: Two finger scroll stuck/not happening
Product: Wayland
Version: unspecified
Hardware: Other
OS: All
Status: NEW
Severity: normal
Priority: medium
Component: libinput
Assignee: wayland-bugs@lists.freedesktop.org
Reporter: eyen...@gmail.com
Created attachment 137358
--> https://bugs.freedesktop.org/attachment.cgi?id=137358&action=edit
evemu recording
I noticed today that there is a issue with two finger scrolling.
"Sometimes" I start to scroll with two fingers and nothing happens. If I then
use only one finger (either by lifting one or lifting both and then touching
only with one again) I will scroll. The only way to 'unstuck' the scrolling is
to click.
I am not sure which version introduced this behavior and I wasn't able to
playback the recording. Further I'm not sure if this is indeed a bug in
libinput or was introduced by the kernel but since the debug output showed what
I was experiencing I filed the bug here.
debug-events:
...
event17 POINTER_MOTION +70.55s -30.54/ 0.00
event17 POINTER_MOTION +70.56s -19.44/ 0.00
event17 POINTER_MOTION +70.58s -6.94/ 0.00
event17 GESTURE_SWIPE_BEGIN +71.06s 3
event17 GESTURE_SWIPE_UPDATE +71.06s 3 0.00/ 1.18 ( 0.00/ 3.58
unaccelerated)
event17 GESTURE_SWIPE_UPDATE +71.08s 3 -0.21/ 0.80 (-1.41/ 5.37
unaccelerated)
event17 GESTURE_SWIPE_UPDATE +71.10s 3 0.00/ 2.02 ( 0.00/10.74
unaccelerated)
event17 GESTURE_SWIPE_UPDATE +71.12s 3 -1.29/11.70 (-3.75/34.00
unaccelerated)
event17 GESTURE_SWIPE_UPDATE +71.14s 3 0.00/17.89 ( 0.00/48.32
unaccelerated)
event17 GESTURE_SWIPE_UPDATE +71.16s 3 -1.39/15.90 (-3.75/42.95
unaccelerated)
event17 GESTURE_SWIPE_UPDATE +71.18s 3 -2.08/11.26 (-5.62/30.42
unaccelerated)
event17 GESTURE_SWIPE_UPDATE +71.20s 3 -1.39/ 5.96 (-3.75/16.11
unaccelerated)
event17 GESTURE_SWIPE_UPDATE +71.22s 3 -1.39/ 1.99 (-3.75/ 5.37
unaccelerated)
event17 GESTURE_SWIPE_UPDATE +71.26s 3 -0.63/ 0.00 (-1.87/ 0.00
unaccelerated)
event17 GESTURE_SWIPE_UPDATE +71.28s 3 0.00/-22.13 ( 0.00/-66.21
unaccelerated)
event17 GESTURE_SWIPE_UPDATE +71.30s 3 0.00/-14.58 ( 0.00/-39.37
unaccelerated)
event17 GESTURE_SWIPE_UPDATE +71.32s 3 0.00/-6.63 ( 0.00/-17.90
unaccelerated)
event17 GESTURE_SWIPE_UPDATE +71.34s 3 0.00/-2.65 ( 0.00/-7.16
unaccelerated)
event17 GESTURE_SWIPE_UPDATE +71.36s 3 0.00/-1.33 ( 0.00/-3.58
unaccelerated)
event17 GESTURE_SWIPE_UPDATE +71.38s 3 0.00/-1.33 ( 0.00/-3.58
unaccelerated)
event17 GESTURE_SWIPE_UPDATE +71.40s 3 0.00/-0.66 ( 0.00/-1.79
unaccelerated)
event17 GESTURE_SWIPE_UPDATE +71.42s 3 0.00/-0.66 ( 0.00/-1.79
unaccelerated)
event17 GESTURE_SWIPE_END +71.62s 3 cancelled
event17 POINTER_AXIS +71.83s vert -20.54* horiz 3.82* (finger)
event17 POINTER_AXIS +71.85s vert -27.17* horiz 10.41* (finger)
event17 POINTER_AXIS +71.87s vert -24.52* horiz 11.11* (finger)
event17 POINTER_AXIS +71.89s vert -15.90* horiz 6.94* (finger)
event17 POINTER_AXIS +71.91s vert -5.96* horiz 2.78* (finger)
event17 POINTER_AXIS +71.93s vert -1.33* horiz 1.39* (finger)
...
-event17 POINTER_BUTTON +75.24s BTN_LEFT (272) pressed, seat count: 1
event17 POINTER_BUTTON +75.34s BTN_LEFT (272) released, seat count:
0
event17 POINTER_MOTION +76.07s 0.00/ -1.81
event17 POINTER_MOTION +76.09s 0.00/-20.53
event17 POINTER_MOTION +76.11s 0.00/-26.51
The POINTER_AXIS motions result in the unwanted scrolling effect and stay until
the POINTER_MOTION click happens.
I'm on arch linux;
libinput 1.9.4-1
libinput-git 1.10.0.r9.g582e3c00
linux 4.15.3-1
linux-ck-haswell 4.14.18-1
linux-ck-haswell 4.14.19-1
udevadm
P: /devices/platform/i8042/serio1/input/input14/event17
N: input/event17
S: input/by-path/platform-i8042-serio-1-event-mouse
E: DEVLINKS=/dev/input/by-path/platform-i8042-serio-1-event-mouse
E: DEVNAME=/dev/input/event17
E: DEVPATH=/devices/platform/i8042/serio1/input/input14/event17
E: ID_BUS=i8042
E: ID_INPUT=1
E: ID_INPUT_HEIGHT_MM=77
E: ID_INPUT_TOUCHPAD=1
E: ID_INPUT_TOUCHPAD_INTEGRATION=internal
E: ID_INPUT_WIDTH_MM=101
E: ID_PATH=platform-i8042-serio-1
E: ID_PATH_TAG=platform-i8042-serio-1
E: ID_SERIAL=noserial
E: LIBINPUT_DEVICE_GROUP=11/2/7:isa0060/serio1
E: LIBINPUT_MODEL_SYNAPTICS_SERIAL_TOUCHPAD=1
E: LIBINPUT_MODEL_TOUCHPAD_VISIBLE_MARKER=1
E: MAJOR=13
E: MINOR=81
E: SUBSYSTEM=input
E: USEC_INITIALIZED=4970735
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