Arch Linux

huszty

Member

Registered: 2016-08-06

Posts: 1

HP EliteBook 745 G3 touchpad absolute position issue (gnome, libinput)

Hi,
Yesterday I've installed Arch on my company laptop. Trachpoint works well fortunately, but the touchpad has a strange behavior by default. It looks like it map the corsor's absolute place on the screen to the touch place on the pad. So like when I touch the pad on the top right corner, the cursor goes to the top right corner of the screen immediately. It is similar to a touchscreen behavior, but with the touchpad .

[huszty@745-G3 ~]$ xinput 
⎡ Virtual core pointer                    	id=2	[master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer              	id=4	[slave  pointer  (2)]
⎜   ↳ PS/2 Generic Mouse                      	id=12	[slave  pointer  (2)]
⎜   ↳ SynPS/2 Synaptics TouchPad              	id=13	[slave  pointer  (2)]
⎣ Virtual core keyboard                   	id=3	[master keyboard (2)]
    ↳ Virtual core XTEST keyboard             	id=5	[slave  keyboard (3)]
    ↳ Power Button                            	id=6	[slave  keyboard (3)]
    ↳ Video Bus                               	id=7	[slave  keyboard (3)]
    ↳ Power Button                            	id=8	[slave  keyboard (3)]
    ↳ Sleep Button                            	id=9	[slave  keyboard (3)]
    ↳ HP HD Camera                            	id=10	[slave  keyboard (3)]
    ↳ AT Translated Set 2 keyboard            	id=11	[slave  keyboard (3)]
    ↳ HP Wireless hotkeys                     	id=14	[slave  keyboard (3)]
    ↳ HP WMI hotkeys                          	id=15	[slave  keyboard (3)]

[huszty@745-G3 ~]$ xinput list-props 13
Device 'SynPS/2 Synaptics TouchPad':
	Device Enabled (137):	1
	Coordinate Transformation Matrix (139):	1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
	Device Accel Profile (261):	0
	Device Accel Constant Deceleration (262):	1.000000
	Device Accel Adaptive Deceleration (263):	1.000000
	Device Accel Velocity Scaling (264):	10.000000
	Device Product ID (257):	2, 7
	Device Node (258):	"/dev/input/event18"
	Evdev Axis Inversion (265):	0, 0
	Evdev Axis Calibration (266):	<no items>
	Evdev Axes Swap (267):	0
	Axis Labels (268):	"Abs MT Position X" (287), "Abs MT Position Y" (288), "Abs MT Pressure" (289), "Abs Tool Width" (286), "None" (0), "None" (0), "None" (0)
	Button Labels (269):	"Button Left" (140), "Button Unknown" (260), "Button Right" (142), "Button Wheel Up" (143), "Button Wheel Down" (144)
	Evdev Scrolling Distance (270):	0, 0, 0
	Evdev Middle Button Emulation (271):	0
	Evdev Middle Button Timeout (272):	50
	Evdev Third Button Emulation (273):	0
	Evdev Third Button Emulation Timeout (274):	1000
	Evdev Third Button Emulation Button (275):	3
	Evdev Third Button Emulation Threshold (276):	20
	Evdev Wheel Emulation (277):	0
	Evdev Wheel Emulation Axes (278):	0, 0, 4, 5
	Evdev Wheel Emulation Inertia (279):	10
	Evdev Wheel Emulation Timeout (280):	200
	Evdev Wheel Emulation Button (281):	4
	Evdev Drag Lock Buttons (282):	0

I am not an expert of the xinput parameters so I could only disable the whole touchpad to avoid unintended touches .
Can I fix it with some xinput setting of it is a more serious issue in some driver?

Thanks in advance!

ParadoxZero

Member

Registered: 2016-08-13

Posts: 1

Re: HP EliteBook 745 G3 touchpad absolute position issue (gnome, libinput)

I managed to install arch just now and have encountered the same issue.

Lenovo Z50-70

has anyone found a solution?

lopsided98

Member

Registered: 2016-07-23

Posts: 5

Re: HP EliteBook 745 G3 touchpad absolute position issue (gnome, libinput)

I have the same problem. It only occurs when using "xf86-input-evdev", not "xf86-input-libinput". I have an Elantech trackpad on a Dell Inspiron i7559.