Just upgraded to Razr Maxx HD running JB (4.1.1). I'm a Button Savior guy (soft keys) so I have no use for the space-wasting navigation bar that spans the bottom of the screen. I can't find a way to disable it. I've read LOTS of entries on the subject but haven't found the right solution. I tried modifying build.prop with qemu.hw.mainkeys=1. That worked, sort of (left the very bottom of the screen blank and unusable) but generated lots of those System UI (or whatever it is) error messages. I installed a couple of different apps that are supposed to make the Navigation Bar disappear (NavBar and FullScreenToggle, for instance) but all that does is make the same build.prop entry, which generates the same error messages. One app hid the Navigation Bar but kept the space it took up blank. What's the point of THAT? I read that CM10.1 and ParanoidAndroid have a control to hide the Navigation Bar, and I don't mind flashing a new ROM, but the custom JB ROMs seem to still have bugs in areas that would be a problem for me (BT, wi-fi tether, camera).
So -- I can't find a solution. I believed I've searched pretty thoroughly but hopefully I've overlooked something. My Maxx HD is rooted, of course (w/Safestrap), and running the stock ROM. I love the phone. Just want to be able to hide/disable the Navigation Bar and have full use of the space it takes up.