Windows 10: "update-grub" ignores menuentry - but works

[GaVenga]

Problem: Manjaro testing and Windows 10, installed on separate drives.

sudo update-grub                                                                                                                    
[sudo] Passwort für *****: 
GRUB-Konfigurationsdatei wird erstellt …
Thema gefunden: /usr/share/grub/themes/manjaro/theme.txt
Linux-Abbild gefunden: /boot/vmlinuz-5.9-x86_64
initrd-Abbild gefunden: /boot/amd-ucode.img /boot/initramfs-5.9-x86_64.img
Found initrd fallback image: /boot/initramfs-5.9-x86_64-fallback.img
Linux-Abbild gefunden: /boot/vmlinuz-5.8-x86_64
initrd-Abbild gefunden: /boot/amd-ucode.img /boot/initramfs-5.8-x86_64.img
Found initrd fallback image: /boot/initramfs-5.8-x86_64-fallback.img
Adding boot menu entry for UEFI Firmware Settings ...
erledigt

The entry for “Windows 10 Bootmanager” is missing above.
I added to /etc/default/grub.cfg:
GRUB_DISABLE_OS_PROBER=true
and added the menuentry for Windows 10 into: /etc/grub.d/40_custom
(Reason was double entry some times before/ago)
…
After latest update (?) the command “update-grub” does not mention “windows 10 Bootloader”
any longer. May be ashamed of windoofs?

In Grub-Menu the entry “Windows Boot-Manager” is there and works as usual, even if I re-install grub.

[linuxn00b]

I ran into similar issue. You may try and mount Windows EFI partition and then run mkconfig.

[Fabby]

@GaVenga

, installed on separate drives.

• If you have 2 ESPs than this behaviour is normal: grub only looks at the EFI partition of the bootable drive and doesn’t even look on the other one…
• If you manually add an entry in /etc/grub.d/40_custom then this will not be mentioned during update-grub.
  I.E. I have a ton of custom entries there (E.G. Bootable GParted ISO, Debian, …) and they don’t show up during generation neither but are present in the grub menu regardless…

P.S. Next time before posting output type export LANG=C and then kommt alles in Englisch und nicht in Deutsch all output will be in English from that point forward until you close the terminal.

[GaVenga]

@Fabby

If you manually add an entry in /etc/grub.d/40_custom then this will not be mentioned

This is the case - and now I do not have to wonder me any longer - thanks Fabrizio!!!

(Feel free to correct any of my speling and gramar erors!) stolen by german parvenü