Re: Debian live iso on usb returns grub

["Thomas Schmitt" <scdbackup@gmx.net>]

Hi,

Massimo Maiurana wrote:
> thanks for your answer.

You got one more without Cc:maiurana@gmail.com :
  https://lists.debian.org/msgid-search/YvogMm/B0cM/AUMu@einval.com

(This one did not doubt your subject line as much as i did.)


> What i took is not a live iso but instead it's the installer iso.

I now tried in quemu
  https://cdimage.debian.org/cdimage/unofficial/non-free/cd-including-firmware/weekly-builds/amd64/iso-cd/firmware-testing-amd64-netinst.iso
which i downloaded ~8 hours after your post.

  qemu-system-x86_64 -enable-kvm -m 512 \
                     -bios /usr/share/ovmf/OVMF.fd \
                     -hda firmware-testing-amd64-netinst.iso

Offering the ISO as -hda is supposed to trigger the same boot path as
a USB stick at a real machine.
This run gives me a text/graphical menu with Debian logo, mentioning of
"UEFI" and "GRUB" and some offers to install Debian. I.e.
GRUB found the storage device with the ISO and loaded its configuration.


In your case i assume that this search does not yield success.

Inspecting the content of the EFI partition of the ISO
  mount firmware-testing-amd64-netinst.iso /mnt/iso
  mount /mnt/iso/boot/grub/efi.img /mnt/fat
i see the search in file /mnt/fat/efi/debian/grub.cfg :

  search --file --set=root /.disk/info
  set prefix=($root)/boot/grub
  source $prefix/x86_64-efi/grub.cfg

So if my theory is right, GRUB failed to find a filesystem with file
  /.disk/info
The interesting question is why.

Does your downloaded ISO behave differently with above qemu run ?


Have a nice day :)

Thomas