I ran preupgrade.
I have /boot/upgrade/vmlinuz (no number, just vmlinuz. It was not x, so I did chmod +x)
grub.cfg has linux /boot/upgrade/vmlinuz
But when I try to boot, grub says "error, you must load the kernel first"
So, preupgrade doesn't work, again!! Never has!
Any tips on how to get it to work??