Question

After a routine kernel update on a RHEL 9 server, the system boots into the new kernel but a critical proprietary storage driver fails to load. As a temporary measure, you need the server to boot the previous (working) kernel by default on every reboot until the vendor releases a fix. Which action accomplishes this persistently?

Accepted Answer

Run 'grubby --set-default' pointing to the previous kernel's vmlinuz path

Answer

Edit the GRUB menu at boot and press Enter on the older kernel entry each time

Answer

Remove the new kernel package with 'dnf remove kernel' to force the old one

Answer

Set 'GRUB_DEFAULT=saved' in /etc/default/grub without running grub2-mkconfig