You should disable the Intel VT-d on the BIOS.
If you search for the the iommu message and Intel VT-d, you should be able to find more info (this forum too).
I have disabled the Intel virtualization from bios and changed the disk mode to ide. Im still facing the error.
i have also tried command line options to grub such as intel-iommu=false intel_iommu=false. I tried to replace false with "no" as well as 0 but the error is still there.
can you help please help me with the exact grub setting?