Bug 98008

Summary:	Cannot start two-finger scroll from bottom area of touchpad
Product:	Wayland	Reporter:	buggit
Component:	libinput	Assignee:	Wayland bug list <wayland-bugs>
Status:	RESOLVED NOTOURBUG	QA Contact:
Severity:	normal
Priority:	medium
Version:	unspecified
Hardware:	x86-64 (AMD64)
OS:	Linux (All)
Whiteboard:
i915 platform:		i915 features:
Attachments:	output of xinput list-props

Description buggit 2016-10-01 19:08:30 UTC

Created attachment 126948 [details]
output of xinput list-props

I cannot start a two-finger scroll action from the bottom ~30% of the touchpad, it is interpreted as an ordinary cursor move instead. I can start a scroll above the bottom area and continue scrolling into it but I cannot start in it. It works correctly in Windows.

I am using fedora 24, 4.7.4. Problem exists in both Wayland & X (xorg-x11-drv-libinput 0.19.0).

My touchpad is a clickpad, the entire bottom area can be depressed like a button and I assume left-click/right-click is software-defined. I tried changing "ClickMethod" to each of the available options but it seemed to have no effect.

I have provided the output of 'xinput list-props'. I can provide other info if wanted. To determine whether this can be fixed by libinput, etc.

see http://askubuntu.com/questions/706369/two-finger-scrolling-and-two-finger-pointer-moving-if-1-finger-is-in-lower-20 for an alternative description of this issue

Comment 1 buggit 2016-10-04 04:50:36 UTC

OK it isn't a problem with libinput. I found that my libinput configuration options applied correctly after a suspend. Learned of libinput-debug-events and found the device 'ALP000F:00 044E:120C' was generating events before suspend, 'AlpsPS/2 ALPS GlidePoint' with correct config applied afterwards. Workaround for my issue was to blacklist i2c_designware_core to basically disable the first device. Not sure now where the bug actually lies, hope this at least helps anyone with this annoying issue find a workaround.

see also...
http://forums.fedoraforum.org/showthread.php?t=300522 https://ask.fedoraproject.org/en/question/84372/touchpad-doesnt-work-until-after-suspend/

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