Neil, I got a new Fire HD 8 today, along with the charging dock for it. Working fine as a Roon remote. Here’s what I did, for future reference:
-
Charge it up, using the supplied charger.
-
Installed a software update, which brought the system up to version 5.6.2. Apparently this is necessary, as it wouldn’t charge in the dock until I did this.
-
Disable Alexa and (somewhere) Show Mode.
-
Download the Roon APK directly from Roon: http://download.roonlabs.com/builds/RoonMobile.apk. There is apparently no need to mess around with the Google Play store.
-
Change the API of the tablet as described in http://www.androidbeat.com/2015/07/how-to-change-dpi-of-android-device-without-root/. I set it to 189, which is correct, and will make Roon run in landscape mode.
-
Go into Settings > Device Options> Developer Options, and turn on “Stay Awake”, which will prevent the lock screen from coming up when it’s in the charging dock.
-
Put the charging backplate on it (from the Dock box).
-
Open up the “Docs” app on the tablet, and find the Roon API file downloaded earlier. Double-tap to install it. After it installs, “OPEN” it. Roon will open up and ask you which core to use. Tell it. You’re good to go.
-
Plug in the Dock, and put the tablet in the Dock to charge.