How to enable laptop touchscreen?

ekaunt1 · 13 October 2021 16:27

My laptop has a touchscreen that used to work under Linux, but it stopped working a while ago and I’m not sure why. I’m using X, not Wayland. Here’s what I already tried doing to re-enable the touchscreen:

~ ❱ xinput
⎡ Virtual core pointer                    	id=2	[master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer              	id=4	[slave  pointer  (2)]
⎜   ↳ Logitech Gaming Mouse G600              	id=10	[slave  pointer  (2)]
⎜   ↳ MELF0411:00 1FD2:4010 Touchscreen       	id=13	[slave  pointer  (2)]
⎜   ↳ ETPS/2 Elantech Touchpad                	id=15	[slave  pointer  (2)]

So you can see that it recognizes that I have a touchscreen.

~ ❱ xinput enable 13
~ ❱ xinput list-props 13
Device 'MELF0411:00 1FD2:4010 Touchscreen':
	Device Enabled (185):	1
	Coordinate Transformation Matrix (187):	1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
	libinput Calibration Matrix (346):	1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
	libinput Calibration Matrix Default (347):	1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
	libinput Send Events Modes Available (307):	1, 0
	libinput Send Events Mode Enabled (308):	0, 0
	libinput Send Events Mode Enabled Default (309):	0, 0
	Device Node (310):	"/dev/input/event7"
	Device Product ID (311):	8146, 16400

Here you can see that it says that the device is enabled, but it still doesn’t work.

I installed all the drivers listed on the archwiki page (https://wiki.archlinux.org/title/Touchscreen), and it still doesn’t work.

~ ❱ less /proc/bus/input/devices
N: Name="MELF0411:00 1FD2:4010 Touchscreen"
P: Phys=i2c-MELF0411:00
S: Sysfs=/devices/pci0000:00/0000:00:15.3/i2c_designware.1/i2c-1/i2c-MELF0411:00/0018:1FD2:4010.0001/input/input13
U: Uniq=
H: Handlers=event7 mouse0
B: PROP=0
B: EV=1b
B: KEY=400 0 0 0 0 0
B: ABS=10000000003
B: MSC=10

This command also shows that the touchscreen gets recognized as existing.

~ ❱ sudo cat /dev/input/event7

This doesn’t output anything, even when I run my finger over the screen.

~ ❱ cat /usr/share/X11/xorg.conf.d/10-evdev.conf
Section "InputClass"
        Identifier "evdev touchscreen catchall"
        MatchIsTouchscreen "on"
        MatchDevicePath "/dev/input/event*"
        Driver "evdev"
EndSection
~ ❱ cat /usr/share/X11/xorg.conf.d/40-libinput.conf
Section "InputClass"
        Identifier "libinput touchscreen catchall"
        MatchIsTouchscreen "on"
        MatchDevicePath "/dev/input/event*"
        Driver "libinput"
EndSection

I didn’t disable it in any of these conf files.

~ ❱ udevadm info --export-db
P: /devices/pci0000:00/0000:00:15.3/i2c_designware.1/i2c-1/i2c-MELF0411:00/0018:1FD2:4010.0001/input/input13/event7
N: input/event7
L: 0
S: input/by-path/pci-0000:00:15.3-platform-i2c_designware.1-event
E: DEVPATH=/devices/pci0000:00/0000:00:15.3/i2c_designware.1/i2c-1/i2c-MELF
0411:00/0018:1FD2:4010.0001/input/input13/event7
E: SUBSYSTEM=input
E: DEVNAME=/dev/input/event7
E: MAJOR=13
E: MINOR=71
E: USEC_INITIALIZED=3061740
E: ID_INPUT=1
E: ID_INPUT_TOUCHSCREEN=1
E: ID_INPUT_WIDTH_MM=341
E: ID_INPUT_HEIGHT_MM=195
E: ID_PATH=pci-0000:00:15.3-platform-i2c_designware.1
E: ID_PATH_TAG=pci-0000_00_15_3-platform-i2c_designware_1
E: LIBINPUT_DEVICE_GROUP=18/1fd2/4010:i2c-MELF0411:00
E: DEVLINKS=/dev/input/by-path/pci-0000:00:15.3-platform-i2c_designware.1-event

It literally even says here ID_INPUT_TOUCHSCREEN=1.

So I’m confused why despite every program saying that the device is a touchscreen, and that it is enabled and turned on, it’s still not working.

The touchscreen isn’t broken because it still works just fine when I dual boot Windows.

anon89812132 · 14 October 2021 07:08

Hello,

Tiling WMs are known to be a bit of hustle when comes to touchscreen. Have you seen this?

github.com/baskerville/bspwm

[Feature request] Touchscreen support

opened 03:41PM - 21 Sep 16 UTC

freundTech

There is currently no tiling window manager with touchscreen support out there, …but PCs with touch screens are getting more and more common. I would love bspwm to support touchscreen operation. It could look like this: Similar to pointer_action1-3 you could have settings for touch_action1-5 (1-5 fingers), which also can be set to move, resize_side, resize_corner focus and none. For example you could move windows by dragging with 3 fingers and resize them with 4 fingers. Touch actions should not require a modifier key to be held down. sxhkd could implement support for 1-5 finger tap. Gesture recognition to run commands is probably out of scope for this project. Also there are already stand alone programs to do that. To implement touch recognition the TOUCH_BEGIN, TOUCH_UPDATE, TOUCH_END and TOUCH_OWNERSHIP events from libxcb-input should be used. I'm willing to look into that myself (already did a bit of reseach), but my C experience is very limited (also xcb -input documentation is very incomplete). EDIT: I started implementing this over at https://github.com/freundTech/bspwm-touch. In case you're not interested I'll just maintain it as a fork.

That leads to this

from other sources you come to some dotfiles for bspwm
https://github.com/arizonahanson/dotfiles

If you want proper touchscreen support, probably need to install touchegg and set it to mimic keyboard shortcuts, or use a DE like KDE Plasma or Gnome.