The error "Unable to ask Elographics touchscreen identification" indicates that during the DEVICE_ON event, it couldn't get the controller to report various info (the ELO_ID). When this happens, it deactivates the device and closes the fd. So this looks like your issue.
Thus the question becomes, why does the controller not provide the requested info?
The error "Unable to ask Elographics touchscreen identification" indicates that during the DEVICE_ON event, it couldn't get the controller to report various info (the ELO_ID). When this happens, it deactivates the device and closes the fd. So this looks like your issue.
Thus the question becomes, why does the controller not provide the requested info?