Re: HP ProBook x360 11 G1 EE incompatible with grub

[Thomas Schmitt]

Hi,

Michel Bouissou wrote:
> After having disabled Secure boot, I have discovered that none of the
> usual (curent, latest versions as of 2017/12) Linux live USB sticks
> (among : Ubuntu, Mint, Debian, Manjaro, PartedMagic) was able to boot on
> this machine.

I assume the boot success depends much on the set GRUB modules in the image.
So it matters to know exactly which images you tested.

To give tangible examples, these don't work after being dd'ed onto
an USB stick device (not a partition) ?

  
https://cdimage.debian.org/debian-cd/current/amd64/iso-cd/debian-9.3.0-amd64-netinst.iso
 (290 MiB)
  
https://cdimage.debian.org/debian-cd/current-live/amd64/iso-hybrid/debian-live-9.3.0-amd64-xfce.iso
 (1.8 GiB)

(A rare example of a hybrid ISO equipped with SYSLINUX for EFI would be
  http://ftp.uni-kl.de/pub/linux/knoppix-dvd/KNOPPIX_V8.1-2017-09-05-EN.iso (4 
GiB)
)

------------------------------------------------------------------------

I wonder whether a grub-mkrescue ISO would succeed.
On Debian i'd install package "grub-efi-amd64-bin" (and dependencies),
create a dummy directory, run grub-mkrescue, and dd the file output.iso to
the USB stick:

  mkdir ./minmal
  grub-mkrescue -o output.iso ./minimal
  dd if=output.iso bs=64K of=/dev/sdc

If i try such an ISO with OVMF+qemu as -hda, i get to a "grub rescue>" prompt
which reacts on e.g. "ls" and Enter key. (More than the rescue mode is not to
expect with an empty directory as payload.)


Have a nice day :)

Thomas