Operating system: Windows-8-6.2.9200-SP0 64 Bits
Graphics card: GeForce GTX 1070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 388.71
Broken: version: 2.80 (sub 71), branch: blender2.7, commit date: 2019-05-22 00:34, hash: rB0f98c05c8b86
Worked: 2.79 latest daily, and official.
Short description of error
In a hair simulation, if quality steps are more than 1, hair collision doesn't work. Hair moves in random directions.
Exact steps for others to reproduce the error
Add plane, add hair particles to it. Add any collision object. Press play. As default quality steps is 5, hair collision wont work.
I know the whole particles physics thing is being reworked, but it would be great if this annoying bug could be fix till then.