This is also happening on my R5-471T today, that I've had for only about 11 mos. Thought it was a crash at first. My machine is still under warranty. It is happening every time it goes into sleep mode and I hit the power to wake it up. Problem with this is every time I have to reset or turn off and back on again, I have to restart everything I typically use all day. That's a real pain.
Thanks for sharing - b/c at least your solution gives us an explanation why it started happening to everyone all at once. I see a couple of temporary work arounds here anyway. Hopefully this will be corrected soon w/ another update. Figured the more people commenting here, the better.