0

I updated my CentOS 8.2 yesterday (yum update), everything was good until a rebooted my system, there was no boot loader! the system get stuck in a black window without showing anything at all.indeed the problem is grub. I tried to re-config my grub (grub2-mkconfig) by using CentOS 8.2 rescue mode (booted by the DVD ISO), nothing happened.

information:

  • my system is EFI (not legacy BIOS)
  • in the update process both grub and kernel updated as I remember
0

the problem was resolved. this is a bug in grub2 security update discovered 2 days ago.

what I did for solving this problem:

1 - use CentOS 8.2 iso to boot from and use rescue mode and use chroot.

2 - config local repository for BaseOS repo using the image

3 - downgrade grub2 and shim packages(yum downgrade shim-x64 grub2\*)

4 - done!

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.