[syslinux] Sysinux 6 will not boot ISOs on BIOS (i.e. pre-UEFI) systems

H. Peter Anvin hpa at zytor.com
Mon Nov 25 18:32:10 PST 2013


On 11/25/2013 04:12 PM, Gerardo Exequiel Pozzi wrote:
> 
> I made some more and more experiments beyond LBA 65535
> 
> Works: * isolinux-4.07.bin (size 24574) * isolinux-5.00.bin (size
> 34816)
> 
> Does not work: * isolinux-5.01.bin (size 34816) * isolinux-5.10.bin
> (size 36864) * isolinux-6.00.bin (size 38912) * isolinux-6.02.bin
> (size 43008)
> 
> * I just tested exactly at LBA 65535 (works all versions) and LBA
> 65536 (fails all versions > 5.00).
> 

What the heck... there are just about zero plausible differences
between 5.00 and 5.01.

I'm wondering if 17a36e2c91706512e6c425222c9a9a451d9db854 could
plausibly have anything to do with this, since that seems to be the
only possible patch that might affect isolinux.  Is there any way you
could try 5.01-pre1 and 5.01-pre2?  If -pre1 works and -pre2 doesn't,
it is likely that the problem lies in that commit.

	-hpa




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