there is a IOMMU bug HP is debugging and for now you can disable IOMMU and it should boot as well as should work fine. Once HP will identify fix and release it we will integrate into Ubuntu 16.04.
there is a IOMMU bug HP is debugging and for now you can disable IOMMU and it should boot as well as should work fine. Once HP will identify fix and release it we will integrate into Ubuntu 16.04.