Bug 1491533

Summary: Unreliable 3-finger tap on serial touchpads
Product: Red Hat Enterprise Linux 7 Reporter: Peter Hutterer <peter.hutterer>
Component: libinputAssignee: Peter Hutterer <peter.hutterer>
Status: CLOSED ERRATA QA Contact: Desktop QE <desktop-qa-list>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 7.4CC: mboisver, tpelka
Target Milestone: rc   
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Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: libinput-1.6.3-3.el7 Doc Type: If docs needed, set a value
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Clone Of: Environment:
Last Closed: 2018-04-10 11:52:21 UTC Type: Bug
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description Peter Hutterer 2017-09-14 05:41:04 UTC 
Description of problem:
On serial touchpads (most Lenovos) three-finger taps are often detect as pinch gesture due to the pointer jump the touchpad detects when we go above 2 fingers.

Version-Release number of selected component (if applicable):
libinput 1.6.*

How reproducible:
sudo libinput-debug-events --enable-tap

Then tap with three fingers. That should produce BTN_MIDDLE but you'll find it often detects a fake pointer motion and then switches to a pinch or swipe gesture.

Additional info:
from https://bugzilla.redhat.com/show_bug.cgi?id=1455443
Comment 1 Peter Hutterer 2017-09-26 03:37:43 UTC 
libinput-1.6.3-3.el7 is available in brew
Comment 4 Michael Boisvert 2018-01-09 21:01:09 UTC 
I can confirm that three fingered taps create a BTN_MIDDLE event in libinput-1.8.4-2.el7.
Comment 7 errata-xmlrpc 2018-04-10 11:52:21 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2018:0736