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Re: [Bug-xorriso] Acer Aspire V5-121 doesn't see USB ISO as bootable

From: Carlo Caione
Subject: Re: [Bug-xorriso] Acer Aspire V5-121 doesn't see USB ISO as bootable
Date: Mon, 27 Feb 2017 11:48:25 +0100

On Mon, Feb 27, 2017 at 11:07 AM, Thomas Schmitt <address@hidden> wrote:
> Hi,
> uploaded is
>   http://www.gnu.org/software/xorriso/xorriso-1.4.7.tar.gz
> with
>   MD5 4dbeec98ae82e8e8009ea172e3c843ad
> It offers the new -as mkisofs option to set partition type to 0x00:
>   -iso_mbr_part_type "default"|number
>       Set the partition type of the MBR partition which represents the
>       ISO  or  at  least protects it.  Number may be 0x00 to 0xff. The
>       text "default" re-enables  the  default  types  of  the  various
>       occasions to create an ISO MBR partition.
>       This  is  without  effect  if no such partition emerges by other
>       settings or if the partition type is prescribed mandatorily like
>       0xee for GPT protective MBR or 0x96 for CHRP.

It works fine, thank you.
One small thing I noticed is that using this option with a type ==
0x00 the partition is not marked as bootable anymore (status is not
0x80, i.e. like on the Ubuntu ISO or our image using the manual `dd`
to overwrite the type).
Probably it's not important but you never know with the broken EFI
firmwares around. I'll try to test this on the problematic laptops and
I'll let you know if this is important.


Carlo Caione  |  +39.340.80.30.096  |  Endless

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