Old GRUB2 menu appears after install of F23
My system before installing F23:
Laptop: Toshiba Qosimo X500 ~2009 vintage i7 chip, 2 x 500Gb HD - Windows on /dev/sda Linux on /devsdb, 8Gb Ram, Fedora Core 17 X86_64 BIOS Grub2 Menu with options for FC17 & WIndows
/boot partition 2Gb Separate partitions for root (/dev/sdb2), /home, /testos (for additional OS Ubuntu), /opt
Installation of F23 was to replace FC17 on /dev/sdb2. /boot partition was not changed. Everything seemed to go well.
Upon rebooting the old FC17 Grub menu appeared, with no options for F23.
In the /boot directory there are some F23 files:
config-4.2.3-300.fc23.x86_4
System.map-4.2.3-300.fc23.x86_4
vmlinuz-4.2.3-300.fc23.x86_4
vmlinuz-0-rescue-2b91345b969e47ffab0cac862fc0ad66
/boot/grub2/grubenv is a link to: boot/efi/EFI/fedora/grubenv , but there is no grubenv file there.
At the moment I am using Fedora live, when I was using the Ubuntu I was sure there was a grub2.cfg file which had some entries for F23
So, my question is: what should I do to get a boot menu with options that I can boot my OS's again? I have a backup, so I could start from scratch, but there might be an easier way.
Thanks in advance for any help on this :+)