Bug 100955

Summary:	Acer C720 Touchpad Pressure Range
Product:	Wayland	Reporter:	freedesktop
Component:	libinput	Assignee:	Wayland bug list <wayland-bugs>
Status:	RESOLVED WORKSFORME	QA Contact:
Severity:	normal
Priority:	medium	CC:	peter.hutterer
Version:	unspecified
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:

Description freedesktop 2017-05-06 11:09:15 UTC

The update from libinput 1.7.1 to 1.7.2 causes the touchpad on Acer C720 to need more pressure than before. I followed this page to adjust the settings and am filing this bug to get the pressure changes in the repository https://wayland.freedesktop.org/libinput/doc/latest/touchpad_pressure.html.

Here are the settings that seem comfortable to me:

$ cat /etc/udev/hwdb.d/99-touchpad-pressure.hwdb
libinput:name:*Cypress APA Trackpad (cyapa):dmi:*bvncoreboot:bvr4.0-6588-g4acd8ea-dirty:bd09/04/2014:svnGOOGLE:pnPeppy:pvr1.0:rvnGOOGLE:rnPeppy:rvr1.0:cvnGOOGLE:ct3:cvr:
 LIBINPUT_ATTR_PRESSURE_RANGE=23:20

From evemu:
# EVEMU 1.3
# Kernel: 4.10.13-1-ARCH
# DMI: dmi:bvncoreboot:bvr4.0-6588-g4acd8ea-dirty:bd09/04/2014:svnGOOGLE:pnPeppy:pvr1.0:rvnGOOGLE:rnPeppy:rvr1.0:cvnGOOGLE:ct3:cvr:
# Input device name: "Cypress APA Trackpad (cyapa)"
# Input device ID: bus 0x18 vendor 0000 product 0000 version 0x01
# Size in mm: 87x47

$ cat /sys/class/dmi/id/modalias
dmi:bvncoreboot:bvr4.0-6588-g4acd8ea-dirty:bd09/04/2014:svnGOOGLE:pnPeppy:pvr1.0:rvnGOOGLE:rnPeppy:rvr1.0:cvnGOOGLE:ct3:cvr:

Comment 1 Peter Hutterer 2017-05-08 01:43:23 UTC

Is the LIBINPUT_MODEL_CYAPA udev property set for your device? What's the output of udevadm info /sys/class/input/eventXXX for the right event node?

Comment 2 freedesktop 2017-05-09 12:43:10 UTC

I'm not sure if LIBINPUT_MODEL_CYAPA is set to the correct value.

# udevadm info /sys/class/input/event11
P: /devices/pci0000:00/0000:00:15.1/i2c-0/0-0067/input/input11/event11
N: input/event11
S: input/by-path/pci-0000:00:15.1-event-mouse
E: DEVLINKS=/dev/input/by-path/pci-0000:00:15.1-event-mouse
E: DEVNAME=/dev/input/event11
E: DEVPATH=/devices/pci0000:00/0000:00:15.1/i2c-0/0-0067/input/input11/event11
E: ID_INPUT=1
E: ID_INPUT_HEIGHT_MM=47
E: ID_INPUT_TOUCHPAD=1
E: ID_INPUT_WIDTH_MM=87
E: ID_PATH=pci-0000:00:15.1
E: ID_PATH_TAG=pci-0000_00_15_1
E: ID_SERIAL=noserial
E: LIBINPUT_ATTR_PRESSURE_RANGE=10:8
E: LIBINPUT_DEVICE_GROUP=18/0/0/1:i2c-0-0067
E: LIBINPUT_MODEL_CHROMEBOOK=1
E: LIBINPUT_MODEL_CYAPA=1
E: MAJOR=13
E: MINOR=75
E: SUBSYSTEM=input
E: USEC_INITIALIZED=8108960

Comment 3 Peter Hutterer 2017-05-19 05:29:16 UTC

sorry about the late answer.

Your current udevadm output says: 
E: LIBINPUT_ATTR_PRESSURE_RANGE=10:8
but in comment #0 you say that 23:20 is better for you. But as I understand it, you want the pressure needed to be lowered? If so, could it be that the hwdb didn't take effect before testing?

Comment 4 freedesktop 2017-06-02 00:19:08 UTC

It seems that this has resolved itself in an update possibly. I've removed  /etc/udev/hwdb.d/99-touchpad-pressure.hwdb and the touchpad works in the expected manner.

Comment 5 Peter Hutterer 2017-06-02 00:38:52 UTC

ok, thanks. I'm gonna go with the assumption that the hwdb didn't apply properly last time or something like that. Glad it's resolved though :)

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