[syslinux] Looking for debugging ideas and help with testing

[H. Peter Anvin]

That is the handover information.  It will not affect isolinux.

"Ferenc Wagner" <wferi at niif.hu> wrote:

>"H. Peter Anvin" <hpa at zytor.com> writes:
>
>> On 12/13/2010 02:34 PM, Ferenc Wagner wrote:
>>> 
>>> The theory is that the boot.img.gz-s fail to boot correctly if
>written
>>> to a full disk device (/dev/sda), but work fine if written to a
>>> partition (/dev/sda1) and invoked by some MBR (see #604245).  No
>theory
>>> about the ISO, but the reported symptoms are rather similar. 
>Anybody
>>> inclined to help, please test whether the above images (or other
>similar
>>> ones) fail to boot the Debian Installer on their systems.  Thanks.
>>
>> Most likely the problem is that the newer Syslinux misidentifies
>> something in memory as a partition handover structure.
>>
>> Someone -- and I can't remember who right now -- built a debugging
>MBR
>> for testing this case.
>
>Do you mean Gene Cumm's mbrho.S?  I built that right now, under Qemu it
>prints
>
>DL: 80  DS: 0000  SI: 0000
> 53 FF 00 F0 53 FF 00 F0 53 FF 00 F0 53 FF 00 F0
>ES: 0000  DI: FFAC
> 00 00 D4 CC
>
>I can't make much sense of this, but anyway...  Should I get the
>submitters run this?  Could this affect Isolinux as well?
>-- 
>Thanks,
>Feri.

-- 
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