Bug 94097 - Thinkpad T420 touchpad jitters since 1.1.6
Summary: Thinkpad T420 touchpad jitters since 1.1.6
Status: RESOLVED FIXED
Alias: None
Product: Wayland
Classification: Unclassified
Component: libinput (show other bugs)
Version: unspecified
Hardware: Other All
: medium normal
Assignee: Peter Hutterer
QA Contact:
URL:
Whiteboard:
Keywords:
: 94067 (view as bug list)
Depends on:
Blocks:
 
Reported: 2016-02-11 18:07 UTC by Sebastian Keller
Modified: 2016-02-18 01:42 UTC (History)
2 users (show)

See Also:
i915 platform:
i915 features:

Attachments
output of evemu-describe (3.30 KB, text/plain)
2016-02-11 18:07 UTC, Sebastian Keller 		Details
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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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