I've already taken a look at these posts: How do I get the Apple Wireless Keyboard Working in 10.10? and How do I get the Apple Wireless Keyboard Working in 10.10?, but none seem to resolve the problem I'm facing.
In brief, I am able to connect to the keyboard and the keyboard works just fine. But after I shutdown the system and turn it on again, the keyboard won't be connected to the system anymore.
My guess is that Apple Magic Keyboard 2 thinks it's connected to the system so it's not in pairing mode anymore and hence not receiving any connections, but actually it's not connected. (Maybe ubuntu lost connection ? Maybe when shutting down last night, ubuntu forogt to properly disconnect the keyboard) ?
First when it was not connected (after I turned on the PC), it was listed in bluetooth devices and present in bluetoothctl devices. Also info showed it as paired and trusted, but not connected. I first tried to issue connect MAC_ADDR, but the following was thrown:
Failed to connect: org.bluez.Error.Failed
Can't get HIDP connection info connect error: Host is down (112)
I then tried removing the device and connecting it back again, but after I removed it from bluetoothctl, It's not even detected anymore ! (That's why I guessed the keyboard is not in pairing mode anymore and thinks it's connected)
Do you have any idea how can I get it to work reliably ? I can't waste an hour every day or so after each Off/On of the system.