Linux OS GUI is inaccessible for AMD based servers when changes are made in the grub file.
 

My Linux OS has the iommu in turned ON state by default in the kernel. But, When I am adding the line "iommu=pt amd_iommu=on pci=assign-busses" in GRUB_CMDLINE_LINUX inside the vi /etc/default/grub file it is making my Linux OS GUI inaccessible. Can Someone please explain me the reason for this. Thanks in advance:).

Welcome to LinuxQuestions.

There is no kernel option amd_iommu=on

https://www.kernel.org/doc/html/late...arameters.html

Hey Michaelk. Thank you so much for the Answer :). My doubt is clear now.