I recently updated my kernel, but the system keeps booting into the old one. I checked /boot/grub2/grubenv and the only entry is saved_entry pointing to my new kernel. However, whenever I reboot it always boots straight into the old kernel. Any ideas why grub2 would be ignoring the 'saved_entry' in the grubenv?
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Maybe there was an error creating the grub2 entry, I had the same problem on a few of our CentOS servers recently. You could try creating the grub entry like this as a workaround:
grub2-mkconfig -o /boot/grub2/grub.cfg
And reboot.

Craig
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