Official Display Touch interface

[PeterO]

Can someone check if the touch interface on the official display show up in /dev/input/by-id please?

If so, what is it called ?

PeterO

[JimmyN]

Mine doesn't. It adds /dev/input/event0 and /dev/input/mouse0 when the display is connected.

If I plug in my wireless keyboard that will add the sub-directories /dev/input/by-id and /dev/input/by-path but if I unplug the keyboard dongle they disappear again, so the touch interface isn't using them.

[PeterO]

Ah OK, that's useful. I prefer to access devices via /dev/input/by-id because that contains useful symbolic links like this :

Code: Select all

petero@HP /dev/input/by-id $ ls -l 
total 0
lrwxrwxrwx 1 root root 9 Sep 11 18:26 usb-CHICONY_HP_USB_Multimedia_Keyboard-event-if01 -> ../event3
lrwxrwxrwx 1 root root 9 Sep 11 18:26 usb-CHICONY_HP_USB_Multimedia_Keyboard-event-kbd -> ../event2
lrwxrwxrwx 1 root root 9 Sep 11 18:26 usb-Logitech_USB_Trackball-event-mouse -> ../event4
lrwxrwxrwx 1 root root 9 Sep 11 18:26 usb-Logitech_USB_Trackball-mouse -> ../mouse0
petero@HP /dev/input/by-id $ 

I don't know if it is compulsory for a device to add these links. I'll get my screen tomorrow so then I'll be able to investigate further myself

PeterO