On Tuesday, 19 April 2022 at 09:20, Thomas Schmitt wrote:
Hi,
i wrote:
> > Does the following bash hack "repair" the USB stick so that it boots
on
> > the affected machine ?
> > echo $'\x80' | dd of=/dev/sdX conv=notrunc bs=1 seek=446 count=1
Dominik 'Rathann' Mierzejewski wrote:
> No, it doesn't. Still getting "Operation System not found".
A new firmware riddle.
Does it boot with ubuntu-21.10-desktop-amd64.iso ?
(That's supposed to be pure GPT with the little extra MBR partition.)
It doesn't. Same error.
[...]
> I'll try the grub2-mkrescue ISO next.
Once made with and once without extra option
--mbr-force-bootable
please.
(We are now using a long stick to poke around in the mist.)
Image generated with:
$ grub2-mkrescue -o output-mbr.iso --mbr-force-bootable minimal
gives me the "Operation System not found" BIOS error again.
I'll try modifying the ISO from the beginning of this thread according
to your instructions from another subthread.
Regards,
Dominik
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