[syslinux] Buggy bios, boot of dos image hangs with syslinux, but not with isolinux

[H. Peter Anvin]

Zipf Christian wrote:
> H. Peter Anvin wrote:
>> Zipf Christian wrote:
>>> I tried Version 3.71, 3.62, 3.55. Unfortunately it is the same
>>> behavior on all of them. But it is only memdisk that is affected by
>>> this. If I boot a mini linux distro like DSL or SLAX this works just
>>> fine from the usb stick. But than again the memdisk code works if
>>> booted from a cd with isolinux. Mighty strange.    
>>>
>> It's actually not all that strange, since it ends up having different
>> code paths through the BIOS.  Odds are pretty good it is your USB
>> BIOS which is at fault -- it seems to be one of the really poor
>> quality control points of BIOSes these days.   
>>
>> In fact, it would be really helpful if you posted the debugging
>> output from 3.71 (it adds a few new pieces of information that wasn't
>> there in the previous version) from a working (CD-ROM) and a
>> non-working (USB) session.   
>>

The USB boot output isn't from 3.71.

	-hpa