12-26-2019, 10:05 AM
Have you updated grub ?
I'm only guessing here, but it sounds like you updated both hdd/OS separately and while the grub on each individual hdd will have been updated ok, hence their boot up separately, when you try to choose which to boot that grub may be pointing to the earlier kernel.
I suggest you boot into your first drive, then in a terminal:
Then reboot and see if it works if you choose the "other" OS
I'm only guessing here, but it sounds like you updated both hdd/OS separately and while the grub on each individual hdd will have been updated ok, hence their boot up separately, when you try to choose which to boot that grub may be pointing to the earlier kernel.
I suggest you boot into your first drive, then in a terminal:
Code:
sudo update-grubThen reboot and see if it works if you choose the "other" OS
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