However both my Windows 10 (on the same SSD ) and my 2nd (backup) Manjaro installation on a second drive HHD do not appear in the Grub menu anymore. They are both on GPT partitioned drives with EFI boot.
After running os-prober I get the following
sudo os-prober
/dev/sda2@/EFI/Microsoft/Boot/bootmgfw.efi:Windows Boot Manager:Windows:efi
/dev/sdb5:Manjaro Linux (20.2.1):ManjaroLinux:linux
I can boot into both Windows 10 (SSD) and my 2nd Manjaro installation (HDD) if I choose the appropriate device from the BIOS, but they no longer appear in my Grub menu.
If anyone can help that would be greatly appreciated. This exact problem has also occurred on one of my separate machines which is much older, Windows 10 was lost from the Grub boot menu.
I went through this same nonsense! All of a sudden my grub menu disappeared so I had to learn how to get that to show again after months of it showing normally. Then doing what everyone else was probably doing and googling the osprobe solution that was disabled.
What was manjaro doing automatically before that it stopped doing because of this update? What didn’t I configure to avoid this?