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Thread: Boot selection unavailable

  1. #1
    Join Date
    Aug 2023
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    4

    Boot selection unavailable

    Hello everyone, I installed Xubuntu(most recent LTS) to dual boot with windows 10 and the installation was successful, however when I restart the system is booting directly to Xubuntu.
    I read here that the system will show the boot menu to allow me to choose the OS I want to boot but that is not happening.
    If I want to boot win10 I have to press F12 at boot.
    I have tried the boot repair tool and I do not understand the Boot Info Summary so I have not done any repairs yet.
    Here is the Boot Info Summary link: https://paste.ubuntu.com/p/4pHHVmNnRp/
    Can anyone help me understand this and is repairing recommended?

  2. #2
    Join Date
    May 2008
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    3,980
    Distro
    Ubuntu 22.04 Jammy Jellyfish

    Re: Boot selection unavailable

    Your grub file needs a little edit.
    Boot into Xubuntu
    Open a terminal and enter:-
    Code:
    sudo nano /etc/default/grub
    Enter your password
    Code:
    GRUB_DEFAULT=0
    GRUB_TIMEOUT_STYLE=menu #originally hidden
    GRUB_TIMEOUT=10
    GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
    GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
    GRUB_CMDLINE_LINUX=""
    ctrl+o to save and ctrl+x to exit
    Code:
    sudo update-grub
    Reboot
    Any good?

  3. #3
    Join Date
    Aug 2023
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    4

    Re: Boot selection unavailable

    Nope. After reboot it is still booting to Xubuntu without showing any menu.

  4. #4
    Join Date
    May 2008
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    3,980
    Distro
    Ubuntu 22.04 Jammy Jellyfish

    Re: Boot selection unavailable

    Whoops, I forgot OS_PROBER
    Add this line to /etc/default/grub

    GRUB_DISABLE_OS_PROBER=false

    Then sudo update-grub and reboot
    The terminal output from sudo update-grub should find Windows Boot Manager.
    Last edited by tea for one; August 10th, 2023 at 11:28 AM.

  5. #5
    Join Date
    Aug 2023
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    4

    Re: Boot selection unavailable

    Update: Reparing with boot repair did not Unhide GRUB boot menu. I'll try contacting the devs.
    If anyone would want to review the boot info file here are the links:
    after tea for one's method: https://paste.ubuntu.com/p/cVXsPvSmk3/
    after ansarabbas8273's method and recommended repair with boot repair tool: https://paste.ubuntu.com/p/Bj7B5vfDWR/

    Thanks everyone for sparing your time to help.
    According to the device(thinkpad x1 carbon 3rd gen) manufacture, I'll have to keep using F12 at boot, that is until I don't need win10 anymore.
    I will keep the thread open for sometime then mark it as solved.

  6. #6
    Join Date
    May 2008
    Beans
    3,980
    Distro
    Ubuntu 22.04 Jammy Jellyfish

    Re: Boot selection unavailable

    After you ran sudo update-grub, did you see terminal output to confirm that Windows Boot manager was found:-
    Code:
    edited@edited-xubuntu23-04:~$ sudo update-grub
    [sudo] password for edited: 
    Sourcing file `/etc/default/grub'
    Sourcing file `/etc/default/grub.d/init-select.cfg'
    Generating grub configuration file ...
    Found linux image: /boot/vmlinuz-6.2.0-24-generic
    Found initrd image: /boot/initrd.img-6.2.0-24-generic
    Found linux image: /boot/vmlinuz-6.2.0-20-generic
    Found initrd image: /boot/initrd.img-6.2.0-20-generic
    Found memtest86+ 64bit EFI image: /boot/memtest86+x64.efi
    Warning: os-prober will be executed to detect other bootable partitions.
    Its output will be used to detect bootable binaries on them and create new boot entries.
    Found Windows Boot Manager on /dev/sda1@/EFI/Microsoft/Boot/bootmgfw.efi
    Adding boot menu entry for UEFI Firmware Settings ...
    done
    edited@edited-xubuntu23-04:~$

  7. #7
    Join Date
    Aug 2023
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    4

    Re: Boot selection unavailable

    Yes it was found but the boot device menu with with timeout is no show.

  8. #8
    Join Date
    May 2008
    Beans
    3,980
    Distro
    Ubuntu 22.04 Jammy Jellyfish

    Re: Boot selection unavailable

    Quote Originally Posted by plrll View Post
    Yes it was found but the boot device menu with with timeout is no show.
    That's a little bit of progress.
    Do you have Fast boot or similar in your UEFI settings?

  9. #9
    Join Date
    Mar 2010
    Location
    USA
    Beans
    Hidden!
    Distro
    Ubuntu Development Release

    Re: Boot selection unavailable

    Try this
    Code:
    sudo nano /etc/default/grub
    Add this line to your /etc/default/grub file, right after the "GRUB_TIMEOUT=" line
    Code:
    GRUB_RECORDFAIL_TIMEOUT=10
    Save and exit. The update grub to pick up the changes
    Code:
    sudo update-grub
    Reboot and test...

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