Hey guys. This is probably going to be a really dumb question, but a) I only have limited familiarity with Grub2 and b) I really don't want to have to rebuild my SD card image from scratch...again.
I have a Pine64 running 7.3.1611 aarch64, and it started out on kernel 3.10.101. I've issued yum update after yum update, and it finally dawned on me that it wasn't ever booting into the new kernels I was installing. I have 5 of the 4.x kernels installed, but it's never even attempted to boot into them. I've dug around a little bit, and here's what I can see so far:
1) By RPM list, I don't even have a 3.x kernel installed anywhere. It was installed during the initial system image in some way outside of RPM/yum, and it hasn't been removed in the time since. 2) I don't have a grub2.cfg file like my x86_64 systems have. I have a symlink at /etc/grub2-efi.cfg that is supposed to point to ../boot/efi/EFI/centos/grub.cfg, but that doesn't exist either. 3) If I run grub2-mkconfig, I can get a seemingly-valid grub2.cfg file that only references the 4.x kernels I have installed. I put that file at the symlink target from #2 and rebooted, but it apparently had zero impact. It rebooted just fine...into 3.10.101.
So my question boils down to this: what exactly am I missing here that's preventing this from updating kernels correctly? Thanks for the help.
Mike