The Xubuntu install was an install into one partition (SDA2) where two partitions exist both with OSes (SDA1 & SDA2).
The resulting Xubuntu install booted without grub appearing on boot, and no way for a user to boot into prior SDA1 install of Lubuntu noble.
Attempt as in original post of `sudo update-grub` reports
Warning: os-prober will not be executed to detect other bootable partitions.
thus my prior 24.04 system is not offered as boot option.
The Xubuntu install was an install into one partition (SDA2) where two partitions exist both with OSes (SDA1 & SDA2).
The resulting Xubuntu install booted without grub appearing on boot, and no way for a user to boot into prior SDA1 install of Lubuntu noble.
Attempt as in original post of `sudo update-grub` reports
Warning: os-prober will not be executed to detect other bootable partitions.
thus my prior 24.04 system is not offered as boot option.