I have a very similar problem since updating to 15.30 on Radeon 15.11
Windows 10 64 bit
R9 280X Sapphire
Games keep hanging saying the graphics driver has hung. this problem started when i updated the drivers to play the new Tom Clancy game, i can open the game up and go through all the menus but if i start to play the situations or multiplayer then the game hangs after 5 minuets. and since up dating the dirvers all other games have stopped working to weather their steam, origin, u play or something else it doesn't matter.
Yes similar problem with a few games myself:
R9 285 Sapphire
I had the occasional black screen / adapter reset crash too - it's random - it happens after 5 minutes or 1 hour or more.
if the adapter doesn't recover you're left starting at a black screen until a hard reset is done.
I think it might be a power saving issue.
Ultimately I decided to drop back to Windows 8.1 with the 15.12 Crimson drivers - not had any trouble since.
I'm glad that mwnn was able to find a solution but is there a recommendation that doesn't involve me rolling back my os?