VERY strange: Input Devices make no sense

[ManDay]

So, I've implored IRC a couple of times and I've also contacted some developers but after all, this appears to be a gentoo problem. A huge and weird one of which I've got no clue where it could stem from. If you have the time please look into it - I can't explain it.

Mostly everything works. Mouse and Keyboard flawlessly, wacom with a few glitches and I'm not certain where or whether there is any connection between these glitches, the other issues i have and in between these issues. I'll spare you the description of the wacom glitches because they are driver and device specific anyway and come directly to the general weird things:

xxd should dump raw hey data from anywhere. it will usually drop unreadable data on all of the /input/evenX nodes if the device is interacted with.

As for the wacom, the device is clearly present on /input/even4 (say) and when I run xxd from a TTY I'll get the usual stream of hey BUT THEN:

If I run xxd /dev/input (as root) from an X11 terminal I get NOTHING!! That is the case for the wacom, although the wacom works, it is NOT the case for the mouse, and the mouse works, too

Then, as I said mouse and wacom and keyboard work, but if I run

[ManDay]

Is anyone up for this? I've just been told that event devices are locked by the application that first uses it so naturally (more or less, I'm used to that it works on other apps, but maybe thats also a thing specific to the termnal, no idea) I don't get any output If I run xxd.

Yet, this does not even remotely explain why xinput behaves that strangely.