Issue: When using the touchpad, the cursor moves significantly when I lift my finger off of the touchpad, which makes selection and clicking more challenging than it should be.
OS: openSUSE tumbleweed; Gnome
Hardware: Dell inspiron 14z (5423) (Laptop)
I have found that the issue can be corrected by using the xf86-input-synaptics driver, with a /etc/X11/xorg.conf.d entry.
Gnome/wayland is designed to work with libinput, so I have been trying to use an /etc/libinput/override.quirk entry to adjust the touchpad pressure range.
Unfortunately, I have not seen any effect whatsoever, no matter how ridiculous the values are.
I imagine that the contact patch size is how the driver determines pressure, so if I minimize the pressure range, then there will be less cursor shift as the pressure/contact-patch decreases. Maybe this is completely wrong, but I can’t get anything to take effect to know what does or does not work.
I have primarily been using the wayland guide, which states that temporary/local overrides must be handled by a local-overrides.quirk file, stored at /etc/libinput/.
observations:
- When I
libinput quirks list /dev/input/event1, my override quirk is not listed - Settings listed in
libinput list-devicesdo not seem to match the actual settings
Nat.scrolling: disabled
Tap-to-click: disabled
Is there already an override present somewhere? natural scrolling is likely in the home/user/.local (or .config) folder, but the tap-to-click override must be somewhere too.
Am I approaching this correctly?
Any advice/assistance/guidance (even spoon-feeding) is welcome.
-Cyril
Synaptics values that work:
cyril@linux-s5he:~> cat 50-synaptics14z.conf
Section "InputClass"
Identifier "touchpad"
Driver "synaptics"
MatchIsTouchpad "on"
Option "FingerLow" "30"
Option "FingerHigh" "35"
Option "VertScrollDelta" "-111"
Option "HorizScrollDelta" "-111"
EndSection
quirk override that I would like to try:
cyril@linux-s5he:~>cat local-overrides.quirk:
[Touchpad pressure override]
MatchUdevType=touchpad
MatchName=*SynPS/2 Synaptics TouchPad
MatchDMIModalias=dmi:*svnDellInc.:pnInspiron5423*
AttrPressureRange=25:24
AttrPalmSizeThreshold=120
cyril@linux-s5he:~> cat /sys/class/dmi/id/modalias
dmi:bvnDellInc.:bvrA06:bd09/17/2012:svnDellInc.:pnInspiron5423:pvrNotSpecified:rvnDellInc.:rn0F45CW:rvrA06:cvnDellInc.:ct8:cvrNotSpecified:
cyril@linux-s5he:~> sudo libinput list-devices
... ]
Device: SynPS/2 Synaptics TouchPad
Kernel: /dev/input/event1
Group: 10
Seat: seat0, default
Size: 98x48mm
Capabilities: pointer gesture
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: none
Disable-w-typing: enabled
Accel profiles: none
Rotation: n/a
cyril@linux-s5he:~> grep -e "Using input driver 'libinput'" .local/share/xorg/Xorg.0.log
14767.201] (II) Using input driver 'libinput' for 'Power Button'
14767.206] (II) Using input driver 'libinput' for 'Video Bus'
14767.210] (II) Using input driver 'libinput' for 'Power Button'
14767.215] (II) Using input driver 'libinput' for 'Sleep Button'
14767.219] (II) Using input driver 'libinput' for 'Laptop_Integrated_Webcam_HD: In'
14767.226] (II) Using input driver 'libinput' for 'Dell WMI hotkeys'
14767.231] (II) Using input driver 'libinput' for 'AT Translated Set 2 keyboard'
14767.238] (II) Using input driver 'libinput' for 'SynPS/2 Synaptics TouchPad'
14767.245] (II) Using input driver 'libinput' for 'SynPS/2 Synaptics TouchPad'