Touchscreen ABS_X, ABS_Y events ignored by Xorg evdev driver in Ubuntu?

[Teemu Rinta-aho]

Hi all,

I am trying to get a touch screen (GMK) working with Xorg 1.15.1
running on Ubuntu 14.04.

I can get the display work as a touch pad using Xorg mouse driver with 
/dev/input/mouse0, but when I try to use the 'evdev' driver and 
/dev/input/event*, I can only get the button pressed and released events 
to X, i.e. the pointer is not moving anywhere.

I can run evtest to see that there are ABS_X and ABS_Y events coming 
from the device with correct coordinates, but somehow these are not used 
by Xorg. I think I have tried all possible evdev options in Xorg configs.

I would appreciate any insights on how to debug this further, or better
yet, a solution to fix the problem. I can provide more information if 
needed. Thanks.

Here are some screenshots from the system giving some information:

evtest output:
https://drive.google.com/file/d/0B432-jkCZeXgakQ0WXZ1MGZ5dXM/view?usp=sharing

mtdev-test output:
https://drive.google.com/file/d/0B432-jkCZeXgTWxiNElkdzZOdVE/view?usp=sharing

xinput list:
https://drive.google.com/file/d/0B432-jkCZeXgSjJlZjBjakM1ZmM/view?usp=sharing

xinput props:
https://drive.google.com/file/d/0B432-jkCZeXgQUI5NXRONzdrWGc/view?usp=sharing

xinput test:
https://drive.google.com/file/d/0B432-jkCZeXgeDV0Yno3c2tMMkU/view?usp=sharing

xorg.log:
https://drive.google.com/file/d/0B432-jkCZeXgaVVCVWdaeS12Njg/view?usp=sharing

BR,
Teemu Rinta-aho