Issues with GRUB while Triple Booting Manjaro alongside preinstalled Ubuntu and Windows

I am planning to switch from Ubuntu to Manjaro. The constraint is that I have only one machine to work on, and I do not want to remove Ubuntu till I’m comfortable with Manjaro. I read the manual, and it looks like Calamares installer will edit the current boot-partition to accommodate all the OSes.

What else should I take care of? Someone suggested to use rEFInd on this forum. Should I install it from Ubuntu or from Manjaro?

Some basic info regarding my current partitions:

$ lsblk -f
NAME        FSTYPE   LABEL     UUID                                 FSAVAIL FSUSE% MOUNTPOINT
├─nvme0n1p1 vfat     SYSTEM    4A28-AA18                             213.5M    17% /boot/efi
├─nvme0n1p3 ntfs     Windows   5EF42BCAF42BA36F                                    
├─nvme0n1p4 ntfs     WinRE_DRV 1A6E2C226E2BF4E3                                    
└─nvme0n1p5 ext4               d62ac271-482e-4795-a314-74f4f8c8851e   56.9G    56% /
$ efibootmgr -v
BootCurrent: 0000
Timeout: 0 seconds
BootOrder: 0000,0017,0018,0019,001A,001B,001C,001D,001E
Boot0000* ubuntu        HD(1,GPT,e6885e1c-535d-4a6b-aa0f-c9fb981ab364,0x800,0x82000)/File(\EFI\ubuntu\shimx64.efi)
Boot0010  Setup FvFile(721c8b66-426c-4e86-8e99-3457c46ab0b9)
Boot0011  Boot Menu     FvFile(126a762d-5758-4fca-8531-201a7f57f850)
Boot0012  Diagnostic Splash Screen      FvFile(a7d8d9a6-6ab0-4aeb-ad9d-163e59a7a380)
Boot0013  Lenovo Diagnostics    FvFile(3f7e615b-0d45-4f80-88dc-26b234958560)
Boot0014  Startup Interrupt Menu        FvFile(f46ee6f4-4785-43a3-923d-7f786c3c8479)
Boot0015  Rescue and Recovery   FvFile(665d3f60-ad3e-4cad-8e26-db46eee9f1b5)
Boot0016  MEBx Hot Key  FvFile(ac6fd56a-3d41-4efd-a1b9-870293811a28)
Boot0017* USB CD        VenMsg(bc7838d2-0f82-4d60-8316-c068ee79d25b,86701296aa5a7848b66cd49dd3ba6a55)
Boot0018* USB FDD       VenMsg(bc7838d2-0f82-4d60-8316-c068ee79d25b,6ff015a28830b543a8b8641009461e49)
Boot0019* NVMe0 VenMsg(bc7838d2-0f82-4d60-8316-c068ee79d25b,001c199932d94c4eae9aa0b6e98eb8a400)
Boot001A* ATA HDD0      VenMsg(bc7838d2-0f82-4d60-8316-c068ee79d25b,91af625956449f41a7b91f4f892ab0f600)
Boot001B* USB HDD       VenMsg(bc7838d2-0f82-4d60-8316-c068ee79d25b,33e821aaaf33bc4789bd419f88c50803)
Boot001C* PCI LAN       VenMsg(bc7838d2-0f82-4d60-8316-c068ee79d25b,78a84aaf2b2afc4ea79cf5cc8f3d3803)
Boot001D  Other CD      VenMsg(bc7838d2-0f82-4d60-8316-c068ee79d25b,aea2090adfde214e8b3a5e471856a35406)
Boot001E  Other HDD     VenMsg(bc7838d2-0f82-4d60-8316-c068ee79d25b,91af625956449f41a7b91f4f892ab0f606)
Boot001F* USBR BOOT CDROM       PciRoot(0x0)/Pci(0x14,0x0)/USB(11,1)
Boot0020* USBR BOOT Floppy      PciRoot(0x0)/Pci(0x14,0x0)/USB(11,0)
Boot0021* ATA HDD       VenMsg(bc7838d2-0f82-4d60-8316-c068ee79d25b,91af625956449f41a7b91f4f892ab0f6)
Boot0022* ATAPI CD      VenMsg(bc7838d2-0f82-4d60-8316-c068ee79d25b,aea2090adfde214e8b3a5e471856a354)
Boot0023* PCI LAN       VenMsg(bc7838d2-0f82-4d60-8316-c068ee79d25b,78a84aaf2b2afc4ea79cf5cc8f3d3803)

Where is the issue?
If Calamares installer does not work alongside preinstalled both OS, then manually edit new empty partition:
Simply set the directory / for this partition as your chosen file system EXT4 or BTRFS or other.
I think during installation GRUB automatically detects other bootings in UEFI.

1 Like

Apologies for the badly phrased question. I meant to ask that are there any caveats while installing Manjaro alongside other two OSs. I do not want to end up breaking all three distros.

Thanks for the help, I will just go ahead and try installing it through Calamaers and see if it works.

I would like to point a few aspects out which should be taken into account for the corresponding storage allocation.

  • It might be possible to share data areas between the installed systems while some parts need to be kept separate because of consistent version management.
  • Is a home partition (or a similar one) available in your system configuration for any common data exchange?

Grub Ubuntu is not manjaro GRUB or archlinux GRUB
all distribution linux have their grub