I'm completely baffled by this.
It works perfectly under natty narwhal, booting from the live cd and doing no additional installs. Natty is rather unstable, but the touch screen stuff works. Natty is on 2.6.38, don't know if that is materially different for touch screen drivers.
I am trying to see why it doesn't under debian. try xev, and it shows nothing happening when the screen is touched. The debian kernel is 2.6.32. When I do lsusb, it sees the device, gives bus 003 and dev 007.
When I plug it in and out and try cat /var/log/dmesg I find this buried someplace in the results:
[ 6.937367] generic-usb 0003:0408:3000.0003: hiddev0,hidraw2: USB HID v1.10 Device [Quanta Computer Inc. Optical Touch Screen] on usb-0000:00:02.1-3/input0
So it seems to be seeing the device itself, and it seems to be logging when its plugged in and out.
There is no xorg.conf file in Squeeze, or in Natty. So my old quick and dirty approach to this will not work - generate one and then copy it over.
Maybe try another live CD?
Any suggestions?
Peter