Hi,

I have one of those eGalax usb touchcontroller with VID 0x0eef and PID 0x0001.
With Linux raspberrypi 4.4.13-v7+ #1 SMP Thu Jun 16 14:39:49 CEST 2016 armv7l GNU/Linux
the hid-multitouch module creates two input events

Available devices:
/dev/input/event0:      eGalax Inc. USB TouchController Pen
/dev/input/event1:      eGalax Inc. USB TouchController

event0 is displaying some output with evtest while touching but not event1.
Same like in http://www.spinics.net/lists/linux-input/msg35682.html

If I do
# echo 3 0eef 0001 16 > /sys/bus/hid/drivers/hid-multitouch/new_id
before plugging in the touchscreen event1 is working and also my touch applications.

I tried the suggested udev rule to set quirks but it does not work.
In hid_multitouch.c I added a pr_info in mt_probe to see the difference
with or without adding the new_id.

Without new_id set mt_probe has VID:ffffffff PID:ffffffff in hid_device_id *id and
QUIRKS:a0000148 in hid_device *hdev.

With new_id set mt_probe has VID:eef PID:1 in hid_device_id *id QUIRKS:80000148
in hid_device *hdev.

I tried to add the the vid/pid to mt_devices but still getting VID:ffffffff PID:ffffffff
in mt_probe.

Can anyone point me to the right direction how to get the eGalax touchscreen working
without unplugging -> rmmod hid-multitouch -> modprobe hid-multitouch -> echo to new_id -> plug in?

Regards

Stefan


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