We updated to UE4 4.13. Everything seems to work perfectly on the Galaxy S6 phones, but certain S7 phones are showing a black screen ( audio still plays ).
I created a simple project with a single map ( the standard default level with a plane and a starting point ) and have the same problem.
When comparing the hardware, the significant difference we found was that the black screen phones were using a Qualcomm Snapdragon 820 processor while the other phones used a Exynos 7 or 8 processor.
I tried turning on OpenGL 3.1 support but that didn’t seem to make a difference.
I also tried running an arm64 build (instead of the armv7). That displayed, but that didn’t run in VR mode; just a full screen monoscopic display.
Thanks for your help!