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

Zipf Christian zipf.mailcom at boewe-systec.de
Thu Aug 7 02:41:39 PDT 2008


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.   
> 
> 	-hpa
> 
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I made two screenshots of the boot process. I think it missed 2 lines of
the debug info but i could not get it to stop before.

Christian
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