Bug 1262434 - Two finger scrolling became three finger scrolling
Two finger scrolling became three finger scrolling
Product: Fedora
Classification: Fedora
Component: kernel (Show other bugs)
All Linux
unspecified Severity medium
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Assigned To: Benjamin Tissoires
Fedora Extras Quality Assurance
Depends On:
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Reported: 2015-09-11 12:13 EDT by Randy Barlow
Modified: 2016-01-20 23:36 EST (History)
10 users (show)

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Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Last Closed: 2016-01-20 23:36:01 EST
Type: Bug
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RHEL 7.3 requirements from Atomic Host:
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Tracker ID Priority Status Summary Last Updated
FreeDesktop.org 92091 None None None Never

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Description Randy Barlow 2015-09-11 12:13:19 EDT
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

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 01:41:14 EDT
I discovered that this bug has been reported upstream, and that what really happened is that two finger scrolling has become three finger scrolling.

Comment 2 Benjamin Tissoires 2015-09-29 04:38:49 EDT
OK, there is definitively a kernel bug here. See:

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 08:28:01 EDT
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 08:34:45 EDT
OK, reverted in rawhide.  The build today should contain that change.
Comment 5 Peter Hutterer 2015-10-13 02:11:45 EDT
Randy, can you confirm this works?
Comment 6 Randy Barlow 2015-10-13 05:11:04 EDT
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 2016-01-20 23:36:01 EST
Perhaps I should have marked this closed instead of verified. Thanks again for getting this fixed!

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