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Thank you for the quick response. When I saying locking up, the computer just stops responding. Whatever was on the screen stays on the screen, the mouse/keyboard will not respond, can't ssh in. It almost seems like the box becomes dead to the world. Is there any log file I can check for the CPU/RAM/swap info? I can't get it real time during a lock up.
I have not installed any new applications.
I think I was a little misleading when I used the term server. I used it as a mythTV insallation in my living room. I picked Fedora as an OS to learn on (back around Fedora 5), and have stuck with it, due to comfort level.
I didn't realize I'm already two releases behind! Perhaps this is a good time to upgrade.
Any other ideas or suggestions? I think it may be a hardware prob, as it suddenly has stopped working (with no other changes). After a year of rock solid stability.
From the sounds of hit you're getting a kernel panic for some or other reason.
You've said already you haven't noticed anything untoward in /var/log/messages - run dmesg perhaps and have a look if there's anything funny in there.
In terms of hardware failing, you've already checked your memory; and changed out your disk - leaving only your processor/motherboard that could be the problem - I really doubt this unless you're running the machine in a fairly warm environment that could cause your CPU to fail.
If you check through dmesg and still can't find anything untoward; I'd back the system up and go through the upgrade to Fedora 13 (do a clean install - the upgrade option presents its own difficulties). If you're still having these freezes/lock ups, then you pretty much know that either your MOBO or processor have had it.
1) Boot from a memtest CD and check that your RAM's OK.
2) Check the output from 'sensors' for any temperatures or voltages that look too high/low (you might have to run 'sensors-detect first).
3) Try a different power supply. Most random hangs I've had have been caused by dodgy power.