Translations:GRUB/Restore the GRUB Bootloader/15/en
From Manjaro
Troubleshooting
Manjaro is not recognized
If Manjaro wasn't recognized after an update-grub then probably your Manjaro installation is missing the package lsb-release.
If Manjaro wasn't recognized after an update-grub then probably your Manjaro installation is missing the package lsb-release.