[LI] Fw: [ILUG-BOM] HALT gives problems !!

["Bilal Muddassir" <noorh@xxxxxxxxxxxx>]

Alan Cox has to say this to the problem

"
Most crashes on shutdown like that seem to be APM bios bugs. Especially if
the EIP value is 0050:xxxxxx
"

> On Dec 3, 1999 at 23:26, Erle Pereira wrote:
>
> > Actually its more like... the registers on the cpu.... I wish I could
>
> That looks like a standard dump, which DOS programs sometimes give on
> segfaulting.
>
> I get something like it during normal operation (without segfault, and
> while logged in) by hitting ^-scrolllock.
>
> > but I also get :
> > [CALL TRACE].....followed by some more values...
>
> Yes, that's a trace of what calls what from where, so you can trace the
> program and see why it crashed.
>
> > Unable to handle Kernel Paging request....
>
> Can't page, swap is unmounted.
>
> > Filesytems are unmounted...( eliminates swap space.....  etc...... right
> > .... or am I totally confused ? )
>
> This is a memory/bios/cpu thing.
>
> >  ( NO ERRORS WHILE BOOTING UP  + RUNNING ).. and no others errors what
so
>
> Nope, it's a RAM-only soft error.
>
>
> On Dec 4, 1999 at 00:35, Vaibhav Arya wrote:
>
> > running Red Hat 6.1 and I think that it does come with amp built as
default
> > (apmd starts during boot up). Also, the weirdest part is that when you
> > ctrl-alt-del after the registers are all shown it gives a message about
> > 'shutting down md devices.'  Other than that no problems what so ever...
>
> I'd like to know what md is, too. My guess is it's some overwatch process
> that takes over the console etc when nothing else is left.
>
> Ok, now all the machines with garbage-on-halt (does this occur on
> reboot as well?) have apm enabled, but no apm in hardware, right? Then
> what's probably happening is that the kernel thinks there's apm, attempts
> to turn the computer off, hits a bad interrupt/foo, and crashes what
> little of the system is left at this point. Ask Linus.
>


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