libinput debug-tablet [--help] [options] [/dev/input/event0]
The libinput debug-tablet tool debugs the values of the various axes on a tablet. This is an interactive tool. When executed, the tool will prompt the user to interact with the tablet and display the current value on each available axis.
This is a debugging tool only, its output may change at any time. Do not rely on the output.
This tool usually needs to be run as root to have access to the /dev/input/eventX nodes.
If a device node is given, this tool opens that device node. Otherwise, this tool searches for the first node that looks like a tablet and uses that node.
Events shown by this tool may not correspond to the events seen by a different user of libinput. This tool initializes a separate context.
Part of the libinput(1) suite