Comment 33 for bug 1366421

There was an update to https://bugs.launchpad.net/bugs/989419 today, which had me thinking if tablet-mode could be detected by a disabled/missing keyboard device. I came across this for the Yoga 2 before:
"The keyboard and touch pad are automatically locked when the screen is opened beyond 190 degrees (approximately).".
Is this possibly done in "hardware" or still by some (Windows) driver reading a sensor in software?

@Ritesh, could you check if the list of evdev or xinput devices changes between tablet- and laptop mode?
$ sudo evtest
$ xinput