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Grub doesn't show up and the computer keeps rebooting

SAHIO -  
mamiemando Posted messages 33228 Registration date   Status Moderator Last intervention   -
Hello,

I'm reaching out to you, oh great forum gurus ;-), to seek your help regarding a malfunction with my dual boot installation of Ubuntu 22.04.

I have an HP Elite-book Folio 9470m with an Intel Core i5-3437U processor.

To cut a long story short, after successfully completing the installation, an error message appeared stating that GRUB could not be installed and that it was a fatal error. After closing the notification, the installation was finished. However, after closing the live session, the PC kept restarting in a loop.

What should I do? I tried the 
boot-repair
solution, but unfortunately, the problem persists.

2 answers

  1.
    mamiemando Posted messages 33228 Registration date   Status Moderator Last intervention   7 944
     
    Hello,

    Logically, you need to install grub on 
    /dev/sda
    since that’s where Windows and Linux are installed: 
    • /dev/sda
      corresponds to your hard drive 
    • /dev/sdb
      corresponds to a 4GiB USB stick (your stick prepared for 
      boot-repair
      , I suppose).


    The partition 
    /dev/sda6
    is an ESP partition, which is consistent with the fact that you can enable secureboot. It’s not mandatory to enable it, but if Windows was installed with it, it won’t boot without it, so you will be compelled to reactivate it sooner or later. If you installed Linux with Secureboot disabled, you can make up for it by installing 
    grub-efi-amd64
    : 

    sudo apt update sudo apt install grub-efi-amd64


    For more details regarding the repair itself, you should redo the 
    boot-repair
    procedure by reporting to us:
    • the exact commands you typed
    • their results,
    • the report produced by 
      boot-repair
      at the end of the procedure

    ...because nothing at this stage helps to understand why your first repair didn’t work.

    Good luck
    1
  2. mamiemando Posted messages 33228 Registration date   Status Moderator Last intervention   7 944
     
    Hello,
    • Can you provide more details about what you did with 
      boot-repair
      (which commands you ran).
    • Do you have secure boot enabled?
    • Can you share your partition table (in 
      boot-repair
      : 
      sudo parted -l
      ) - and more generally, the report produced by 
      boot-repair
      at the end of the procedure.


    Good luck!
    0
    1. SAHIO
       
      Good evening,

      Thank you for getting back to me...

      So first of all, with 
      boot-repair
      , I clicked on Recommended repair and there was a little loading time and a window appeared notifying me that the computer's boot had been successfully repaired. Then I restarted the computer, but the problem was still not resolved.

      Secondly, yes I have SecureBoot but it is not enabled.

      Thirdly, I tried your command and here’s what shows up: 

      Model: ATA ST500LM021-1KJ15 (scsi)
      Disk /dev/sda: 500GB
      Sector size (logical/physical): 512B/4096B
      Partition table: msdos
      Disk flags: 

      Number  Start   End     Size   Type      File system       Flags
       1      1049kB  608MB   607MB  primary   ntfs
       2      608MB   431GB   430GB  primary   ntfs
       4      431GB   499GB   68.7GB  extended
       5      431GB   437GB   6144MB  logical    linux-swap(v1)
       6      437GB   437GB   537MB   logical    fat32                 boot, esp
       7      437GB   499GB   62.0GB  logical    ext4
       3      499GB   500GB   663MB   primary   ntfs                  msftres


      Model: JetFlash Transcend 4GB (scsi)
      Disk /dev/sdb: 4052MB
      Sector size (logical/physical): 512B/512B
      Partition table: msdos
      Disk flags: 

      Number  Start     End      Size   Type      File system       Flags
       1      1049kB   4052MB   4051MB primary   fat16                 boot, lba


      Thank you and take care.
      0