Colin Yi wrote:
>
> Hi,
> We found a hard hang on a HP x86 system installed snv_130. firstly I 
> add "set snooping=1" to /etc/system
> to try to get a core dump file. but it doesn't work, the system hang 
> more than one hour and can't enter
> kmdb mode (the deadman timer is the default value). secondly I add?set 
> pcpslump:apic_panic_on_nmi=1? to
> /etc/system, and send an NMI to OS from HP utility, The system enters 
> the kmdb mode this time, But the keyboard
> freeze and I am not able to perform any operations in kmdb.
>
> Does anyone know any other way to debug this hard hang?
>

Have you tied using kmdb via the tip line? Sometimes using tip line is 
helpful.

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