Bug 1262434

Summary:	Two finger scrolling became three finger scrolling
Product:	[Fedora] Fedora	Reporter:	Randy Barlow <rbarlow>
Component:	kernel	Assignee:	Benjamin Tissoires <btissoir>
Status:	CLOSED RAWHIDE	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	medium	Docs Contact:
Priority:	unspecified
Version:	rawhide	CC:	alex, btissoir, gansalmon, itamar, jonathan, kernel-maint, madhu.chinakonda, mchehab, peter.hutterer, rbarlow
Target Milestone:	---
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Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-01-21 04:36:01 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Randy Barlow 2015-09-11 16:13:19 UTC

Description of problem:
I noticed that in the past few days, two finger scrolling seems to have stopped functioning. I do have it enabled in the KDE touchpad settings.

Version-Release number of selected component (if applicable):
% rpm -q libinput
libinput-1.0.1-2.fc24.x86_64

How reproducible:
Every time.

Steps to Reproduce:
1. I'm not confident whether this would affect KDE only, or all libinput environments (I only have KDE), but step 1 for me is to enable two finger scrolling in the KDE settings.
2. Try to scroll with two fingers on a touchpad.

Actual results:
Nothing happens.

Expected results:
The window should scroll.

Additional info:
I'm using KDE 5.4.1 on a Lenovo X1 Carbon Gen. 3 laptop.

Comment 1 Randy Barlow 2015-09-24 05:41:14 UTC

I discovered that this bug has been reported upstream, and that what really happened is that two finger scrolling has become three finger scrolling.

https://bugs.freedesktop.org/show_bug.cgi?id=92091

Comment 2 Benjamin Tissoires 2015-09-29 08:38:49 UTC

OK, there is definitively a kernel bug here. See:
http://www.spinics.net/lists/linux-input/msg41176.html

Josh, can you revert this patch (Input: synaptics - fix handling of disabling gesture mode) from 4.2 and all the branches that F20-23 might be having (or whichever Fedora versions are still receiving some care)?

The fix is worth than the previous bug which was not triggered by most users.

Comment 3 Josh Boyer 2015-09-29 12:28:01 UTC

Thus far the commit you highlighted (e51e38494a8ecc18650efb0c840600637891de2c) is only on the rawhide branch.  It's queued for 4.1.9 and 4.2.2, so I pinged Greg to see if it can be dropped.  Hopefully it won't get backported to those stable branches.

I'll get it reverted in Rawhide today.

Comment 4 Josh Boyer 2015-09-29 12:34:45 UTC

OK, reverted in rawhide.  The build today should contain that change.

Comment 5 Peter Hutterer 2015-10-13 06:11:45 UTC

Randy, can you confirm this works?

Comment 6 Randy Barlow 2015-10-13 09:11:04 UTC

Hi Peter, it does work! Thanks to Benjamin and Josh for the fix. The funny thing is that I had gotten so used to three finger scrolling that it's taken me a few days to get used to this fix ☺ Rawhide++

Comment 7 Randy Barlow 2016-01-21 04:36:01 UTC

Perhaps I should have marked this closed instead of verified. Thanks again for getting this fixed!