I had the same problem, when I upgraded Home Assistant OS from 9.5 to 10, my system stayed on 9.5 until I made change in efi/boot/grub.cfg (set defuaul=99 to set default=1) and now I am on Home Assistant OS 10.
But I have another problem. Before I move to slot B I have this under about:
Home Assistant 2023.4.6
Supervisor 2023.04.0
Operating System 9.5
Frontend 20230411.1 - latest
And all other stuff are working.
only error I had under repair: AppArmor issues - unsuported system
After I moved to slot B In CLI I see that I am on HA OS 10, but under about I have only this:
Home Assistant 2023.4.6
Frontend 20230411.1 - latest
I lose abiliti to shutdown/restart my system, backup doesn’t work, no addons tab,…
error in cli: /dev/sda1 can't open blockdev
Then I try to move back to slot A, but nothing happened in CLI I can see HA OS 9.5.
I lose ability to restart/shutdown, backup, no addons tab, …
Can anyone explain how HA OS upgrade script work?
It is possible to customize it for non-uefi bios machines?