Newly upgraded kernel not being used on reboot

Hi,

I have recently upgraded to omv 8. Except a temporary missing zfs.ko.xz issue everything else went smoothly.

Then I experience an issue on kernel upgrades: when a new Debian kernel is available for upgrades, omv will prompt for a reboot. But after reboot it was still using the previously used old kernel instead of the new kernel. I need to manually select the new kernel and reboot for the new kernel to be used. IIRC this was not the case in my previous omv 7 installation.

I did some quick digging, and found that in "/etc/default/grub", it sets "GRUB_DEFAULT=saved" now, which explains the behavior.

I wonder whether this is the intended behavior for omv 8? I think this kind of defeats the purpose of prompting for a reboot after a kernel upgrade because it will still use the older kernel

EDIT: grammar

Quote from ryecoaaron

If you have the kernel plugin installed and you set a kernel to boot, it will stay on that kernel. This is why I added an "Unset default kernel" button in the latest release of the kernel plugin.

Ah, I guess that's why: when I first encountered the issue, I manually "set boot" on the new kernel, which probably changed GRUB_DEFAULT to saved. Clicking "Unset default kernel" changed it back to 0. I guess it'll work for future upgrades.

It would still be great to document "Unset default kernel" better to make the intention clearer (e.g. "This will use the highest versioned kernel on next boot"). Thanks again!