Just curious if anyone has managed to get this working on later Onyx devices running Android 9 or 10? I downloaded the hidden settings shortcut from the Play store, and used that to get into the accessibility settings on my Note2. In there is a 'Colour inversion' mode, which on my normal Android tablet will invert the screen when switched (same as night mode on the Kobo/Kindle).
On the Onyx it does make the screen flicker when switched but then reverts to normal. (Strangely after I experimented a colour inversion switch also appeared in the Android swipe down menu briefly.) I also enabled the developer mode and tried using the 'night mode' settings in there as well, to no effect.
Looks like Onyx is making sure that you'll need to buy a version 4 device if you want this feature when they will enable it in the OS.. seems a shame that they have deliberately overridden Android to prevent us using this built in feature.. but if someone out there has cracked it, let us know!
On the Onyx it does make the screen flicker when switched but then reverts to normal. (Strangely after I experimented a colour inversion switch also appeared in the Android swipe down menu briefly.) I also enabled the developer mode and tried using the 'night mode' settings in there as well, to no effect.
Looks like Onyx is making sure that you'll need to buy a version 4 device if you want this feature when they will enable it in the OS.. seems a shame that they have deliberately overridden Android to prevent us using this built in feature.. but if someone out there has cracked it, let us know!