https://bugs.freedesktop.org/show_bug.cgi?id=105619
--- Comment #2 from freedesktop@kp-tech.hu --- Thanks for your help! It may be a warning about the audio fuse, but the functionality loss is real - no secondary display exists/detected.
The same problem (same oops and no secondary display) exists with 4.13 kernel + ROCK/ROCM DKMS (https://github.com/RadeonOpenCompute/ROCm).