[syslinux] Problem with Syslinux 2.07 and APM on SMP system

[Terry Barnaby]

Sorry typo, I meant SMP !, (Doing a lot of SNMP coding at the moment ...)

Terry

Petro wrote:

>On Thu, Jan 08, 2004 at 04:28:24PM +0000, Terry Barnaby wrote:
>  
>
>>Hi Joseph,
>>By the way I suspect that not many people have noticed the problem
>>as:
>>1. It only occurs on SNMP systems.
>>2. It only occurs with an SNMP kernel, normal installation kernels are
>>	single processor.
>>3. It only occurs when the boot option apm=power-off is used.
>>    
>>
>
>    ITYM "SMP" systems. SNMP is a different beasty altogether, and isn't
>    usually built into the kernel. 
>
>
>  
>
>>So is suspect that very few have noticed this ....
>>
>>Terry
>>
>>Terry Barnaby wrote:
>>    
>>
>>>Hi Josef,
>>>
>>>I have tried using lilo on the system and all is fine.
>>>So the system boots fine with Grub and Lilo, but if I use
>>>syslinux's pxeboot or isolinux the kernel displays the APM
>>>error and will not power off correctly.
>>>
>>>So there appears to be something that syslinux does or does not
>>>do compared with grub and lilo ....
>>>
>>>Terry
>>>
>>>Josef Siemes wrote:
>>>
>>>      
>>>
>>>>Hi,
>>>>
>>>>Terry Barnaby <terry at beam.ltd.uk> schrieb am 07.01.04 15:12:09:
>>>>
>>>>        
>>>>
>>>>>The system boots fine using the standard Grub boot loader which loads
>>>>>exactly the same kernel and initial RAM disk and APM works fine when
>>>>>booted using Grub.
>>>>>          
>>>>>
>>>>
>>>>Hmm. Grub does many things to the system (and I think it does way too 
>>>>much for the
>>>>purpose it's needed for ...), and I AFAIK it also fiddles around with 
>>>>APM. Maybe it 'fixes' your bios to behave more sane to the kernel.
>>>>
>>>>Did you try lilo? It's similar to syslinux that it doesn't do too much 
>>>>to the
>>>>system, and definitely doesn't touch APM either.
>>>>
>>>>
>>>>        
>>>>
>>>>>So there must be some difference between the way syslinux (pxe and iso)
>>>>>boots Linux and Grub boots Linux that causes the failier.
>>>>>
>>>>>The code in the Linux kernal that prints the error message is attempting
>>>>>to make sure the kernel is running on processor 0 as there are problems
>>>>>with some BIOSes when other CPU's attempt to access the APM BIOS 
>>>>>functions.
>>>>>Could syslinux (pxe and iso) be booting using CPU 1 rather than CPU 0 ?
>>>>>          
>>>>>
>>>>
>>>>Not that I know. AFAIK the BIOS (and that's what syslinux uses) runs 
>>>>on CPU 0,
>>>>so there should be no problem with that.
>>>>
>>>>Since it seems to be a bios issue you could try to upgrade the bios to 
>>>>the latest version, if you didn't do that already. Since vitrually all 
>>>>installation CD's use syslinux
>>>>(isolinux or syslinux itself) this should have happened to more people.
>>>>
>>>>hpa, any comments?
>>>>
>>>>Regards,
>>>>
>>>>Josef
>>>>
>>>>______________________________________________________________________________ 
>>>>
>>>>Nachrichten, Musik und Spiele schnell und einfach per Quickstart im 
>>>>WEB.DE Screensaver - Gratis downloaden: 
>>>>http://screensaver.web.de/?mc=021110
>>>>
>>>>        
>>>>
>>-- 
>>Dr Terry Barnaby                     BEAM Ltd
>>Phone: +44 1454 324512               Northavon Business Center, Dean Rd
>>Fax:   +44 1454 313172               Yate, Bristol, BS37 5NH, UK
>>Email: terry at beam.ltd.uk             Web: www.beam.ltd.uk
>>BEAM for: Visually Impaired X-Terminals, Parallel Processing, Software
>>                      "Tandems are twice the fun !"
>>
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>>
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