What are the Linux system requirements for tablet mode?

I just encountered a different problem from what was previously reported here :
Everything work as expected (lid sensor properly report angle, keyboard/trackpad is properly disabled/enabled when the lid go above ~180) except that the tablet-mode event is not fired, so KDE doesn’t auto-rotate when this setting is enabled :


For information I’m on arch using KDE and I’ve applied the necessary patch to iio-sensor-proxy.

The weird part is that it was working fine yesterday and I didn’t update anything since. I did install tlp, maybe it’s linked …
I’ve tried running libinput debug-events and no event appear when I move the screen to tablet orientation.
Any idea of what to check next ?

EDIT :
Seems that I found the solution, I’ve posted a message here :

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