how to ficx when trackpad stop working all of a sudden but USB mouse and rest of system OK.
source with explanations and various other solutions
find out device's info:
$ grep -iA2 touchpad /proc/bus/input/devices
N: Name="Elan Touchpad"
P: Phys=
S: Sysfs=/devices/pci0000:00/808622C1:05/i2c-2/i2c-ELAN0000:00/input/input6
$ applications git:(master) ls $(find /lib/modules/$(uname -r) -type d -name mouse)
appletouch.ko cyapatp.ko gpio_mouse.ko synaptics_i2c.ko vsxxxaa.ko
bcm5974.ko elan_i2c.ko psmouse.ko synaptics_usb.ko
and to fix:
sudo modprobe -r elan_i2c
sudo modprobe elan_i2c
another way to see input devices:
xinput --list