HW decoder always return green frames on Linux kernel 4.X

Hi,

I am trying to use QSV with ffmpeg on Linux to decode videos. The media SDK I use is from MediaServerStudio2016.

First I got it working on the golden system, CentOS 7.1. It works pretty well. The performance improvement compared to software is quite amazing. I am pretty happy with that.

Then I tried it on Ubuntu 16.04 (kernel is 4.4.0). Everything works well, except it always returns pure green frames..

I upgraded the kernel to 4.4.15, with the same problem. Same for kernel 4.1.28.

Eventually, it works on kernel 3.18.37. NOTE: this problem is only for hardware decoding. It works on all kernels if I remove libmfxhw64-p.so.1.17.

I wonder was there any bug introduced in the i915 driver on Linux 4?