booting distro kernel 4.8.0-52 with kernel parameter amd_iommu=off: boot time 1 minute and "boot finished" sound - just like upstream kernel 4.12-rc1 without amd_iommu parameter.
booting distro kernel 4.8.0-52 with kernel parameter amd_iommu=off:
boot time 1 minute and "boot finished" sound -
just like upstream kernel 4.12-rc1 without amd_iommu parameter.