GPU rendering - renders only world color

Support Basics & Interface
1

I’m having a problem with Cycles and OpenCL rendering.

Whenever I render with the GPU, the world color gets in the way and I can’t see anything else.

See:

CPU rendering works fine: https://i.imgur.com/LRR4qeW.png
GPU rendering doesn’t: https://i.imgur.com/JBAh2bt.png
However, GPU Rendered View does: https://i.imgur.com/K2OzQ1h.png

Specs:

Windows 10 Pro 64 bit
AMD Radeon R9 270X (driver 16.5.2.1)
Blender 2.77 Steam version

Everything was working fine yesterday, then Blender got entirely black (the entire window), then the render doesn’t work anymore.

2

It’s the driver. Reverting back to the Windows default driver (15.11) solved it.
I’ll test 16.3 to see if it works.

I just don’t understand how the driver worked for several days without problems.