Re: Re: Multibooter Shutdown prob

On Wed, 04 Jun 2003 Antonio Galea wrote :
>On 3 Jun 2003, Suprotip  Ghosh wrote:
>
> > Apparently, Windows does not perform an ATX cold shutdown if 
>it
> > detects that it doesn't "own" the MBR. I have seen this 
>happen
> > with Linux also, as well as on pc's with more than one 
>Windows. I
> > do not know, however whether it is a bug/feature of 
>bootloaders
> > across platforms. It is especially a problem with 
>multibooters
> > where apparently the OS that does not detect its own loader 
>fails
> > to perform a shutdown. Only way out is a manual poweroff after 
>the
> > OS shutdown, which is inconvenient and potentially damaging to 
>the
> > hardware.
> >
>
>I've had similar troubles with powerdown, expecially on 
>notebooks: the problem
>usually is related to BIOS: you might want to take a good look at 
>what are the
>settings related to APM or ACPI for your motherboard, and maybe 
>find updated
>drivers for your chipset.
>
>Correct me if I'm wrong, but what has the bootloader to do with 
>the shutdown?
>The kernel does all the job, AFAIK.
>
>Cheers,
>
>Ant9000
>

Thank you folks, for your advice and views.

To be very true, I myself do not know why it occurred to me that 
the partition/loader should be responsible in any way for that 
powerdown, but for the following interesting facts that I feel I 
should share with you now.

1. It is not just a combination of Linux and Windows that shows 
this intersting diversion. I have had a multibooting pc for along 
time now, and I have tried a number of combinations, especially 
Win95, Win98, Win2000 and WinCairo. Out of these, I could achieve 
successful poweroff for both os-es only once, with win98 and 
winXP. That too, when win98 was in the first partition, and XP in 
the 4th of the extended; the reverse FAILED at poweroff. Neither 
win98/win 2000, nor winXP/win2000 could achieve this. I had never 
modified the normal boot configuration for these os-es.

2. In my present installation, I was using a bootdisk to boot 
Linux, so the Windows installation (98) did not seem to 'know' 
that i had Linux on my pc. This way, both systems were powering 
off smoothly!! But due to a glitch in my fdd, I had to install 
grub. THE POWEROFF PROBLEM STARTED RIGHT AFTER THAT. It was 
accompanied by an unexplained removal of the 'suspend' command 
 from Windows shutdown menu.

I can not imagine how a chipset can explain this. Please help.

This problem is not unique to me, I have seen similar cases for a 
number of configurations. I would like to know a bit more about 
the exact structure of the shutdown process of os-es, up to 
poweoff. any resources anyone can suggest?

Regards,

Suprotip



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