Peter Jeremy wrote:
On Tue, 2006-Aug-15 21:17:21 +0300, Apatewna wrote:
O/H Android Andrew [:] ??????:
I've checked supply voltages by digital multimeter,
This won't show a noisy supply rail (eg due to high ESR capacitors).
If you suspect power, check the rails under load (eg lots of disk
seeks and I/O) using an oscilloscope.
I've checked voltages on MB contacts exactly under load (during port
compilation). I have no oscilloscope, so I can't control voltage
impulse, especially on multiple channels.
In this case I could only replace PSU for testing.
and temperature I've
checked "manually" by putting my hand on supply case
Assuming the PSU cooling fan is running, the temperature of the
exhaust air would be more accurate. (If the cooling fan isn't
running, I'd check why).
It's ok with cooling fan, and temperature of the exhaust air is within
the bounds of normal in comparison with other computers around me.
The same system has been working properly for the last 6 months under
amd64 version of FreeBSD 6.0-STABLE...
Are you in a position to revert and see if the system starts working
stably?
I wouldn't like to do it because, first of all, it will take much
additional time and some hardware (on-board network adapter, on-board
sound card, video adapter) are not supported under amd64 platform. If I
will not find a solution of this problem I'll have to revert.
Check your BIOS to see if it has the option "CPU thermal shutdown".
I always disable it on client systems since it has the potential of
driving you nuts with no apparent reason.
I've had my laptop thermal sensor glitch once but it logged an
overtemperature event before it shutdown. The downside of inhibiting
the thermal shutdown is that if a real problem eventuates (and CPU
fans do fail), you will destroy the CPU and maybe mobo.
I haven't found any overtemperature event but I'll try to disable "CPU
thermal shutdown" for a testing time.
It might be worthwhile setting up a serial console and logging it
on another box to see if anything is written to the console before
it dies.
It's great idea, I'll try it. Do I need a null-model cable to do it?
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