Bug 94097

Summary:	Thinkpad T420 touchpad jitters since 1.1.6
Product:	Wayland	Reporter:	Sebastian Keller <sebastian-keller>
Component:	libinput	Assignee:	Peter Hutterer <peter.hutterer>
Status:	RESOLVED FIXED	QA Contact:
Severity:	normal
Priority:	medium	CC:	peter.hutterer, yackushevas
Version:	unspecified
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:
Attachments:	output of evemu-describe

Description Sebastian Keller 2016-02-11 18:07:47 UTC

Created attachment 121686 [details]
output of evemu-describe

With the motion hysteresis changes in 1.1.6 the touchpad of my T420 has started to jitter even when trying to hold the fingers as still as possible. Reverting to 1.1.5 fixes this issue.

Comment 1 Peter Hutterer 2016-02-16 22:40:46 UTC

*** Bug 94067 has been marked as a duplicate of this bug. ***

Comment 2 Sebastian Keller 2016-02-17 03:35:05 UTC

I've tried the patch posted on the mailing list and it fixes this issue for me.

Comment 3 Peter Hutterer 2016-02-18 01:42:11 UTC

commit d6b889852abd3e5f238769be55cb4a30e5db6dcb
Author: Peter Hutterer <peter.hutterer@who-t.net>
Date:   Wed Feb 17 09:06:09 2016 +1000

    touchpad: add synaptics semi-mt devices to those needing hysteresis

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