here a typo
echo options vfio-pci ids=: 1002:73bf, 1002:ab28,…,…,…,…,…,… disable_vga=1 > /etc/modprobe.d/vfio.conf
for 6800 does
options vfio-pci ids=1002:73bf,1002:ab28 disable_vga=1
thanks lot , I got it working with your instructions !
Cheers,
Marin