Keyboard stopped working a few weeks ago.
Obviously the system detects when keyboard is attached or detached, as an icon shows up for a few seconds.
However, in both cases (detaching ans attaching!) it is the tablet mode icon that is displayed.
So even with keyboard attached, neither keyboard nor touchpad are working.
I took following steps to fix (from various older entries in Acer community), nothing helped so far:
1) Updated BIOS to 1.09
2) Updated Intel Kabylake ME drivers
3) Updated Intel Kabylake Virtual Button drivers
all above downloaded from Acer support page for my switch model
In order to enforce a reinstallation, I deinstalled following drivers, then rebooted:
4) HID / GPIO-DockMode-Indikatortreiber
5) HID / GPIO -Laptop/Slate-Indikatortreiber
6) HID / Microsoft Input Configuration Device
I cleaned the Pogo pins at Keyboard connector multiple times.
Now I give up w/o further help.
Using an external keyboard, my Switch is definitely no more a mobile device.
Thanks for any help