Re: Debugging hard lockups (hardware?)

[John Bradford]

> This machine locks up solid every few days.  Caps Lock, Num Lock, Scroll Lock do
> not respond.  The NMI watchdog does not kick in.  Alt-SysRq-keys do not
> respond.  Logs show no hint of any problem (that I recognise) before lockup.
> Occurs often during scrolling e.g., Mozilla.  I swapped the Radeon 7000 for a
> 7500, then an Nvidia.
> 
> I guess hardware.  But memtest run exhaustively shows no problem.

Have you tried the CPUBURN utilities?

http://users.ev1.net/~redelm/

John.