"Garrett D'Amore" <garr...@damore.org> wrote:
> On Mon, 2010-10-11 at 11:18 -0700, Saadia Fatima wrote:
> > How can I catch a system panic/freeze. I tried booting up with a kernel
> > debugger, with -k option in the GRUB menu. When the system freezes how can
> > I switch to the debugger? I tried f1+shift+a but it did not work.
> >
> > Thanks
> > SF
>
>
> If your system freeze occurs at a level below the keyboard interrupt
> handler, then you're screwed. Some systems have a button or switch that
> can generate an NMI -- if you have one of those, then that can work for
> you. Otherwise, you're out of luck.
F1+a is handles via a low priority soft interrupt.
On a Sparc system, you can replug the kbd and on a x86 system, you can send a
BREAK (note that this is not ASCII) to the console.
The latter events are handled via max-1 priorized interupt handlers and in most
cases still working.
Jörg
--
EMail:jo...@schily.isdn.cs.tu-berlin.de (home) Jörg Schilling D-13353 Berlin
j...@cs.tu-berlin.de (uni)
joerg.schill...@fokus.fraunhofer.de (work) Blog:
http://schily.blogspot.com/
URL: http://cdrecord.berlios.de/private/ ftp://ftp.berlios.de/pub/schily
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