bro, put one nvidia 710 or amd rx560 gigabyte (prefer rx560)
all start work after that, sleep, hardware accel via DGPU with iMacPro1,1 and shikigva=128 smbios, dual monitor+, etc
the config looks very good, just need it
first lego to one fine tune. extract one sendme with this folder. reset nvram with f11 key in boot screen one time
the best in this case is one AMD RX560 or Nvidia 710. intelhd 530 sleep and other little things don't work