I'm currently looking into an issue we are having with a USB touchscreen controller causing Weston to display a cursor when plugged in.
The device is an "Elo TouchSystems 2216 AccuTouch USB Touchmonitor Interface", which is being handled by hid-generic.
Weston (via libinput) is detecting this device as a mouse:
Jan 12 12:38:36 GE00409729044C weston[387]: [12:38:36.674] input device 'EloTouchSystems,Inc Elo TouchSystems 2216 AccuTouch® USB Touchmonitor Interface', /dev/input/event5 is tagged by udev as: Mouse
Jan 12 12:38:36 GE00409729044C weston[387]: [12:38:36.676] input device 'EloTouchSystems,Inc Elo TouchSystems 2216 AccuTouch® USB Touchmonitor Interface', /dev/input/event5 is a pointer caps
Looking at the device capabilities and properties:
# cat /sys/class/input/event5/device/capabilities/abs
100 3
# cat /sys/class/input/event5/device/capabilities/key
10000 0 0 0 0 0 0 0 0
# cat /sys/class/input/event5/device/properties
0
I think I'm right in saying that this device is providing ABS_X, ABS_Y, ABS_MISC and BTN_LEFT (or BTN_MOUSE as they are the same code).
So, looking at the code paths in libinput I believe this is being detected as a "VMware's USB mouse".
>From what I understand, a touchscreen should be claiming BTN_TOUCH rather than BTN_LEFT, which seems to be the case as a second device that I have access to (Dialogue Technology Corp. PenMount USB) which is working.
I see that the PenMount device has a routine that patches up some of the button mapping. Is that what I need to do for this device as well?
Thanks in advance,
Martyn
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