Bug 95437 - Choppy response on Elantech trackpads with libinput 1.3.0
Summary: Choppy response on Elantech trackpads with libinput 1.3.0
Status: RESOLVED DUPLICATE of bug 95393
Alias: None
Product: Wayland
Classification: Unclassified
Component: libinput (show other bugs)
Version: unspecified
Hardware: x86-64 (AMD64) Linux (All)
: medium normal
Assignee: Wayland bug list
QA Contact:
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2016-05-17 00:52 UTC by Lisandro Pin
Modified: 2016-05-17 00:58 UTC (History)
1 user (show)

See Also:
i915 platform:
i915 features:


Attachments
evemu-record ouput for simple right-to-left pointer movement. (106.91 KB, text/plain)
2016-05-17 00:52 UTC, Lisandro Pin
Details

Description Lisandro Pin 2016-05-17 00:52:42 UTC
Created attachment 123803 [details]
evemu-record ouput for  simple right-to-left pointer movement.

After an upgrade to libinput 1.3.0 my Elantech trackpad (on an Asus UX305C) became very unresponsive and inaccurate - it takes serveral tries to get the pointer moving, as if it became "sticky" somehow. Reverting libinput to 1.2.4 fixes this issue and the trackpad works fluidly without any issues whatsoever.

OS: Arch Linux x64
Libinput version: 1.3.0
/sys/class/dmi/id/modalias: dmi:bvnAmericanMegatrendsInc.:bvrUX305CA.201:bd09/11/2015:svnASUSTeKCOMPUTERINC.:pnUX305CA:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnUX305CA:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:

libinput-list-devices:
...
Device:           Elan Touchpad
Kernel:           /dev/input/event8
Group:            6
Seat:             seat0, default
Size:             96.78x64.21mm
Capabilities:     pointer 
Tap-to-click:     disabled
Tap-and-drag:     enabled
Tap drag lock:    disabled
Left-handed:      disabled
Nat.scrolling:    disabled
Middle emulation: n/a
Calibration:      n/a
Scroll methods:   *two-finger edge 
Click methods:    *button-areas clickfinger 
Disable-w-typing: enabled
Accel profiles:   none
...
Comment 1 Lisandro Pin 2016-05-17 00:55:45 UTC
Also, the output of xinput list-props "Elan Touchpad" when running on X11. The issue is still present if running on Wayland (Gnome 3):

Device 'Elan Touchpad':
	Device Enabled (139):	1
	Coordinate Transformation Matrix (141):	1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
	libinput Tapping Enabled (277):	1
	libinput Tapping Enabled Default (278):	0
	libinput Tapping Drag Enabled (279):	1
	libinput Tapping Drag Enabled Default (280):	1
	libinput Tapping Drag Lock Enabled (281):	0
	libinput Tapping Drag Lock Enabled Default (282):	0
	libinput Accel Speed (283):	0.477941
	libinput Accel Speed Default (284):	0.000000
	libinput Natural Scrolling Enabled (285):	1
	libinput Natural Scrolling Enabled Default (286):	0
	libinput Send Events Modes Available (261):	1, 1
	libinput Send Events Mode Enabled (262):	0, 0
	libinput Send Events Mode Enabled Default (263):	0, 0
	libinput Left Handed Enabled (287):	0
	libinput Left Handed Enabled Default (288):	0
	libinput Scroll Methods Available (289):	1, 1, 0
	libinput Scroll Method Enabled (290):	1, 0, 0
	libinput Scroll Method Enabled Default (291):	1, 0, 0
	libinput Click Methods Available (292):	1, 1
	libinput Click Method Enabled (293):	1, 0
	libinput Click Method Enabled Default (294):	1, 0
	libinput Disable While Typing Enabled (295):	1
	libinput Disable While Typing Enabled Default (296):	1
	Device Node (264):	"/dev/input/event8"
	Device Product ID (265):	1267, 5
	libinput Drag Lock Buttons (297):	<no items>
	libinput Horizonal Scroll Enabled (266):	1
Comment 2 Peter Hutterer 2016-05-17 00:58:39 UTC
sounds exactly like bug 95393 so I'm merging the two

*** This bug has been marked as a duplicate of bug 95393 ***


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