I recently upgraded my Surface with Windows RT to Windows RT 8.1 Preview. When I close the Type Cover, the screen shuts down as it should. However, if I leave the cover on overnight, the display screen refuses to turn on, though I can tell that the tablet is on because of the vibration upon tapping the Windows key. The only workaround I have discovered is to force shut down the tablet and turn it on, in which the display starts working again. This only started happening after I had upgraded it to 8.1, and I had also dropped it ~1-2 feet the same day. Is it because of the drop, or is it because of a bug in Windows RT 8.1 preview specifically with the Surface? If it is because of a bug, can someone point me to the filed bug, or tell me if I should file the bug myself? (I have a laptop with Windows 8.1 Preview, and it does not occur there if I leave the lid closed for extended periods of time).
EDIT: I have recently installed a system firmware update. I'll see if that fixes the problem.