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Re: GRUB -- Debian overrides? (but on original thread topic, not so much)

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On Thu 21 Dec 2023 at 22:19:47 (-0500), Felix Miata wrote:
> David Wright composed on 2023-12-21 19:20 (UTC-0600):
> > On Thu 21 Dec 2023 at 21:38:46 (+0000), Mark Fletcher wrote:
> 
> >> My very first attempt involved using Debian's
> >> /boot partition as the /boot partition for LFS as well, so installing
> >> LFS's kernel (6.4.12 IIRC) alongside Debian's, but I quickly learned
> >> the folly of that when I saw the mess update-grub made of that...
>  
> > What sort of mess? I would have thought Grub would ignore excess
> > kernels dropped into /boot. 
> 
> It doesn't exactly ignore. This is from a rather old Dell MBR booting
> with Grub Legacy installed (but rarely actually used to boot Bullseye):

[ … ]

> Found kernel: /boot/vmlinuz
> Found kernel: /boot/vmlinuz-prv2
> Found kernel: /boot/vmlinuz-prv
> Found kernel: /boot/vmlinuz-cur
> Found kernel: /boot/vmlinuz-5.10.0-26-amd64
> Found kernel: /boot/vmlinuz-5.10.0-23-amd64
> Found kernel: /boot/vmlinuz-5.10.0-20-amd64
> Found kernel: /boot/vmlinuz-5.10.0-18-amd64
> Found kernel: /boot/vmlinuz-5.10.0-14-amd64
> Found kernel: /boot/vmlinuz-5.10.0-13-amd64
> Found kernel: /boot/vmlinuz-5.10.0-11-amd64
> Found kernel: /boot/vmlinuz-5.10.0-9-amd64
> Updating /boot/grub/menu.lst ... done

[ … ]

> Newer PCs with grub-efi exhibit similar behavior, but all here that actually
> have grub-efi installed already have current kernel.

Mine is a bullseye BIOS-booting laptop with the previously listed
/boot directory. I copied a couple of kernels and initrds from
the bookworm RCs in partition noah04, and then ran grub-mkconfig.
Stderr shows:

  Generating grub configuration file ...
  Found linux image: /boot/vmlinuz-6.1.0-13-686
  Found initrd image: /boot/initrd.img-6.1.0-13-686
  Found linux image: /boot/vmlinuz-6.1.0-10-686
  Found initrd image: /boot/initrd.img-6.1.0-10-686
  Found linux image: /boot/vmlinuz-5.10.0-26-686
  Found initrd image: /boot/initrd.img-5.10.0-26-686
  Found linux image: /boot/vmlinuz-5.10.0-25-686
  Found initrd image: /boot/initrd.img-5.10.0-25-686
  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 Debian GNU/Linux 12 (bookworm) on /dev/sda4
  done

All the Debian kernels installed from linux-image-….deb packages
are found by Grub, and appear in the usual array of prefix10
menuentries. Also, both the bookworm kernels are found by
os-prober, as shown by the previously posted   zgrep result:
listing, and appear in the usual array of prefix30 menuentries.

But something about the hd-media installer kernel/initrd seems
to prevent Grub from finding them and constructing a menuentry.

We know that the LFS kernel is detected by Debian's os-prober,
but only that Grub makes a "mess" when given the opportunity
of finding the LFS kernel in the same /boot as the Debian ones.
What exactly is this mess?

Cheers,
David.

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Thread

GRUB -- Debian overrides? Or maybe I just don't understand it well... Mark Fletcher <mark27q1@gmail.com> - 2023-12-18 21:40 +0100
  Re: GRUB -- Debian overrides? Or maybe I just don't understand it well... Richmond <dnomhcir@gmx.com> - 2023-12-18 22:00 +0100
  Re: GRUB -- Debian overrides? Or maybe I just don't understand it  well... Felix Miata <mrmazda@earthlink.net> - 2023-12-18 23:20 +0100
    Re: GRUB -- Debian overrides? Or maybe I just don't understand it well... Mark Fletcher <mark27q1@gmail.com> - 2023-12-20 01:30 +0100
      Re: GRUB -- Debian overrides? Or maybe I just don't understand it  well... Felix Miata <mrmazda@earthlink.net> - 2023-12-20 03:50 +0100
        Re: GRUB -- Debian overrides? Or maybe I just don't understand it  well... David Wright <deblis@lionunicorn.co.uk> - 2023-12-20 07:10 +0100
          Re: GRUB -- Debian overrides? Or maybe I just don't understand it  well... Felix Miata <mrmazda@earthlink.net> - 2023-12-20 08:00 +0100
          Re: GRUB -- Debian overrides? Or maybe I just don't understand it well... Mark Fletcher <mark27q1@gmail.com> - 2023-12-21 22:40 +0100
            Re: GRUB -- Debian overrides? Or maybe I just don't understand it well... Mark Fletcher <mark27q1@gmail.com> - 2023-12-21 23:00 +0100
            Re: GRUB -- Debian overrides? Or maybe I just don't understand it  well... David Wright <deblis@lionunicorn.co.uk> - 2023-12-22 02:30 +0100
              Re: GRUB -- Debian overrides? (but on original thread topic, not so  much) Felix Miata <mrmazda@earthlink.net> - 2023-12-22 04:30 +0100
                Re: GRUB -- Debian overrides? (but on original thread topic, not so  much) David Wright <deblis@lionunicorn.co.uk> - 2023-12-22 06:40 +0100
              Re: GRUB -- Debian overrides? Or maybe I just don't understand it well... Mark Fletcher <mark27q1@gmail.com> - 2023-12-22 12:30 +0100
                Re: GRUB -- Debian overrides? Or maybe I just don't understand it  well... David Wright <deblis@lionunicorn.co.uk> - 2023-12-27 06:00 +0100
        Re: GRUB -- Debian overrides? Or maybe I just don't understand it well... "Roy J. Tellason, Sr." <roy@rtellason.com> - 2023-12-20 17:10 +0100
        Re: GRUB -- Debian overrides? Or maybe I just don't understand it well... Mark Fletcher <mark27q1@gmail.com> - 2023-12-21 22:40 +0100
          Re: GRUB -- Debian overrides? Or maybe I just don't understand it  well... Felix Miata <mrmazda@earthlink.net> - 2023-12-22 01:40 +0100
            Re: GRUB -- Debian overrides? Or maybe I just don't understand it  well... Greg Wooledge <greg@wooledge.org> - 2023-12-22 01:50 +0100
    Re: GRUB -- Debian overrides? Or maybe I just don't understand it well... Mark Fletcher <mark27q1@gmail.com> - 2023-12-21 23:50 +0100
      Re: GRUB -- Debian overrides? Or maybe I just don't understand it well... Anssi Saari <anssi.saari@debian-user.mail.kapsi.fi> - 2023-12-22 08:50 +0100
        Re: GRUB -- Debian overrides? Or maybe I just don't understand it well... Mark Fletcher <mark27q1@gmail.com> - 2023-12-22 12:00 +0100
          Re: GRUB -- Debian overrides? Or maybe I just don't understand it well... Mark Fletcher <mark27q1@gmail.com> - 2023-12-22 12:50 +0100
            Re: GRUB -- Debian overrides? Or maybe I just don't understand it  well... Felix Miata <mrmazda@earthlink.net> - 2023-12-22 15:20 +0100

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