On Mon, Jun 3, 2024 at 3:11 AM Patrick Dupre via users users@lists.fedoraproject.org wrote:
I updated a fedora 38 installation to 40 (on sdc3) as I used to do. But this installation is now not visible from the grub bot menu. I run grub2-mkconfig -o /boot/grub2/grub.cfg again, and again from both installation (40 and 38 on sda4).
The output seems OK (Fedora 40 found from fedora 38, and fedora 38 found from fedora 40). os-prober OK cf /dev/sdc3:Fedora Linux 40 (Forty):Fedora1:linux (from fedora 38)
The only way to start fedora 40 is to boot from super grub2 If I understand UEFI does not see the fedora 40 installation
It looks that the information from grub2-mkconfig are never made available to the grub boot
I ran into something similar installing Fedora 39 under KVM. To make it work I had to make sure the VM was configured for UEFI. I did not pursue trying to get to boot as BIOS.