I am running an Intel x64 machine using UEFI to boot an SSD.
Installing the latest yum update which includes grub2 and kernel
4.18.0-193.14.2.el8_2.x86_64 renders the machine unbootable, blank
screen where grub should be, no error messages, just hangs.
After some hours I managed to modify another bootable partition
(containing older software) and boot it from there.
After that, I found out it is a known problem.
The main point of this message is to make people aware of the problem
and suggest admins don't run 'yum update' until they understand the
problem and have a fix at hand.
See 'UEFI boot blank screen post update' for a solution and directions
to the redhat article.
Regards
Alan
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