How can Linux demage a motherboard?
- From: "Tom Szabo" <tom@xxxxxxxxxxxxxxxx>
- Date: Sat, 21 Apr 2007 05:23:27 +1000
Hi,
I have recently purchased a few servers, AMD Opteron based. I have installed
Linux with the 2.6 kernel and started configuring. I have run into some
confguration problems so after a few hours of changing setting and
installing components I have abandoned the installed image and decided to
plug in a different drive with an image that was installed on a different
(Intel based) server. I have started up the server and it booted as normal,
except the server that previously run quietly during the boot process
started to get noisy, the fans started to work harder halfway through the
bootup process, after a while the fans started to go run flat out for a few
seconds and the system decided to initialise a system shutdow, and shutdown
without a question.
I have restarted the server and this time the server only run for about
10-15 seconds with increasing fan speed and shut down again.
On the third try the server only ran for a couple of secod, the fans just
shad enough time to speed up, and the system shut down straight away. i have
tried again and again, but no change.
I check the CPU and all components for heat, non was overheating, all seemed
fine.
I had the second server unpacked and started using it. After pluging in the
"second" image, that was created on s different system the server started
the same behaviour and became unusable. At this stage I had no idea what is
causing the problem. I had the two servers to rest, and after a few hours of
rest I did a few tests.
After "cooling off", the servers will turn on and operate for a few minutes,
but once they do the first shutdown as previously did, they will only
operate for another 10-15 second, and any subsequent attempt of fireing them
up will last for a seccond or two. Again lleaving them for a few hour
allows too get them goind for a few minutes.
I have called the manufacturer and explained the situation, at this stage I
was not aware of the affect of the second image, going through the simptom
together with the tech guy on the other end of the line, we ame to the
conclusion that this is a MotherBoard problem and they are dspatching one
for me.
In the evening I decided to unpack the third server and using the "first
image" I started to continue the abandoned configuration. Another 2 hours
went past using the 3rd server without any problem, but I could not get the
ystem configured the way I needed so plugged in the "second image" and
booted up the 3rd server again. During the boot while the server was going
through the different run levels I heard the fans speeding up and somewhat
fluctuating. I suddenly realises the situation and understood that this this
problem only started on all 3 servers when I booted up with this image, I
halted the boot process, but it was too late. After unpluggging the drive
from the 3rd machine and trying to reoot again, the server run for a few
minutes and shut down as the other 2 did previously.
Here it became clear that Linux has made some changes, altered something in
the bios or who knows where and I have to reset watever has changed.
I have tried to reset the bios with the dip switch, in the bios set back to
default and removed the power cable from the motherboard together with the
bios battery. Left it rest for a little while, started up again, but no
change.
I have even managed to update the bios hoping to overwrite any changes, but
no affect. The servers still behave the same way. Have plugged in a
different powersupply, still made no difeerence.
My conclusion at this stage is that some sensor or other mechanism has been
adjusted or demage by the OS, and none of the above attempts to reset it has
worked!!!
What could it be? How can an operating system cause such irreversible
change??
TIA,
Tom
.
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