Hard lock on 2.6-test9

[Dan Creswell]

Chipset is E7505 with dual Xeons.

Under X, I can provoke a lock just by waggling the mouse.  I've had the 
machine connected up to a serial console with nmi_watchdog=1 and, when 
the machine dies, nothing is printed on the console (I guess that makes 
it *very* bad :( ).

Booting with "noapic" helps stability considerably (though I have had 
one lockup with even that this morning).  I've also tried disabling AGP 
support in-kernel and that makes no difference.

Strangely, 2.4 is considerably more stable (without "noapic") - anybody 
have any idea what's going on or what to look at next (I'm happy to roll 
my sleeves up and stare at code - just need some pointers)?

If you'd like more details, let me know and I'll post them.

Many thanks,

Dan.

P.S.  There appear to have been other recent discussions on this topic 
with complaints of IDE (I have an MPT/Fusion SCSI setup) and ethernet 
load being enough to cause the hard lock.


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