I have a problem: Once I have an Apple Wireless Keyboard paired with our Nexus 10 running KitKat 4.4 (rooted), no keys work. It is the oddest thing. To pair it, I have to enter the code that shows up, which I do and press ENTER and the pop up goes away. But yet, not a single key works. It even shows as Paired in Bluetooth (i've unpaired and paired it about 50 times).
This is not a duplicate because I have something unique that I have not seen in the dozens and dozens of blog posts, fixes, complaints, links, forum posts etc that I've read related to bluetooth and Android Keyboard.
I have previously paired another Apple Wireless Keyboard, and while it did pair and work correctly, a few keys were damaged. So, we got a new Apple Wireless Keyboard, and it is not working at all.
Even more info: the new keyboard works 100% correctly on my Nexus 5 (root), Galaxy Nexus (CM10.2) and Samsung S4 (CM 10.3) as well as on our Nexus 7 FHD (OEM, non-rooted).
So, the keyboard works on other devices. And, I previously had a different bluetooth keyboard paired with this Nexus 10. Why won't they both talk?
I have even factory reset, and wiped the Internal Storage on the Nexus 10 - nothing.
And yes, I removed the batteries from the other keyboard. Wifi does not matter as I tried it both on and off.
Again, it does pair successfully. Entering the wrong PIN during the pairing process gives the correct error message, and entering the correct one is accepted when pressing ENTER. So, the input IS working.
Lastly, I've noticed that the "Hardware Input" section of the Settings -> Language & input area doesn't show on this Nexus 10 (again, before and after a factory reset and internal storage format). Nothing, nothing at all. This area shows up on my Nexus 5 (4.4) and Galaxy (4.2) when I pair the same keyboard, which allows me to type using the external keyboard with a few additional settings.
On the Nexus 10, while the keyboard is paired, all it does it show the touch keyboard popup when I tap on an input field. On the Nexus 5 and Galaxy Nexus, when I tap on an input with the same keyboard paired, the touch keyboard does not popup - indicating it knows to use the external keyboard that is paired.