Re: Elo TouchSystems touchscreen support? (04e7:0022)

["Henrik Rydberg" <rydberg@euromail.se>]

Hi Bastien,

> Built into my Lenovo A700 all-in-one is a touchscreen. lsusb says:
> $ lsusb | grep -i touch
> Bus 002 Device 006: ID 04e7:0022 Elo TouchSystems

I take it this is a dual-touch device?

> The touchscreen "works", in that tapping it will create a click event,
> though that click event is always in the top left of the screen.

This is quite common for HID multitouch devices without proper driver
support. Sometimes using the HID_MULTI_INPUT quirk helps. Check
usbhid/hid-quirks.c for examples.

> Full output of lsusb -vvv attached.
> 
> Anybody with ideas as to what I'm missing, or whether that particular
> device is supported?

You probably noted already that the 04e7:0020 device is listed in
usbhid. Unless the device claims to be win7 compliant (implying
patching up hid-multitouch), going with the evtouch X driver might get
you a bit on the way. Or - god forbid - the binary blob drivers...

> Using kernel 2.6.38-rc2-git5 (from Fedora rawhide).

The serial elo driver has not been updated since 2007...

Cheers,
Henrik