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Thread: CentOS 7 not visible in grub menu made by Leap 15.1

  1. #1

    Default CentOS 7 not visible in grub menu made by Leap 15.1

    CentOS /boot is on separated xfs partition.
    Legacy BIOS.

    Any idea please ?

  2. #2

    Default Re: CentOS 7 not visible in grub menu made by Leap 15.1

    Quote Originally Posted by MakeTopSite View Post
    CentOS /boot is on separated xfs partition.
    Legacy BIOS.

    Any idea please ?
    After booting 15.1, in
    YaST > Boot Loader > Bootloader Options
    is the checkbox "Probe Foreign OS" checked?

  3. #3
    Join Date
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    Default Re: CentOS 7 not visible in grub menu made by Leap 15.1

    Note all OS's must boot using the same method or they won't see one another

  4. #4

    Default Re: CentOS 7 not visible in grub menu made by Leap 15.1

    Quote Originally Posted by ratzi View Post
    After booting 15.1, in
    YaST > Boot Loader > Bootloader Options
    is the checkbox "Probe Foreign OS" checked?
    It was grayed so I checked it.

    kexec-tools was then installed but CentOS is still missing in grub menu.

  5. #5

    Default Re: CentOS 7 not visible in grub menu made by Leap 15.1

    Quote Originally Posted by gogalthorp View Post
    Note all OS's must boot using the same method or they won't see one another
    Can you please write something more about method of booting ?

  6. #6
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    Default Re: CentOS 7 not visible in grub menu made by Leap 15.1

    Quote Originally Posted by gogalthorp View Post
    Note all OS's must boot using the same method or they won't see one another
    Wrong. At least Linux does not care (you can boot the same installation both using BIOS and EFI).

  7. #7
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    Default Re: CentOS 7 not visible in grub menu made by Leap 15.1

    Quote Originally Posted by MakeTopSite View Post
    It was grayed so I checked it.

    kexec-tools was then installed but CentOS is still missing in grub menu.
    Missing information, here. You might want to explain why kexec-tools isn't installed. Seems to me it is usually installed by default. Looks to me like you've been doing some fiddling around.
    "Making rich people richer doesn't make the rest of us richer." Ha-Joon Chang
    openSUSE 15.1 4.12.14-lp151.28.16-default x64

  8. #8
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    Default Re: CentOS 7 not visible in grub menu made by Leap 15.1

    Quote Originally Posted by MakeTopSite View Post
    CentOS is still missing in grub menu.
    Run as root
    Code:
    NOW=$(date +%s)
    os-prober
    journalctl --no-pager --since=@$NOW
    and post full output.

  9. #9

    Default Re: CentOS 7 not visible in grub menu made by Leap 15.1

    Quote Originally Posted by kerijan2003 View Post
    Missing information, here. You might want to explain why kexec-tools isn't installed. Seems to me it is usually installed by default. Looks to me like you've been doing some fiddling around.
    It's probably result of failed distribution upgrade. But problem with missing CentOS had appeared much earlier.

  10. #10
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    Default Re: CentOS 7 not visible in grub menu made by Leap 15.1

    There are two main ways to setup booting MBR(legacy) and EFI. If you mix modes the installer may not see any OS in a different mode thus it does not get added to Grub. If you installed Centos in legacy mode and openSUSE in .EFI the legacy mode OS may not be seen by the setup tools and not be added to the grub menu.

    In general you need to boot the installer in the mode you want to use to boot the OS and for simplicity all OS's should use the same boot method.

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