(In reply to Michel Dänzer from comment #3)
> Comment on attachment 131361 [details]
> CurrentDMesg
> 
> This dmesg is with nomodeset, so it doesn't contain any information related
> to the problem.
> 
> Please attach the dmesg output from an attempt without nomodeset.

I am not sure how to get a dmesg out of it.  Does Dmesg log to a file
somewhere?  I can't boot into the OS and output anything to text file as it
just provides a "AMD-Vi: Completion-Wait loop timed out" and a bunch of disk
checks that kept failing never allowing me to logon.  I left it for 8-9 hours
and i was still unable to do anything with the system other than a
Ctrl-Alt-SysRq REISUB.

Please let me know how to proceed.

thanks