> Whether they are identical or not, showing us a dmesg diff with a known > working release booted from both a working and the non-working system > could also be helpful.
Another Supermicro X7SPA-HF-D525 board (same chipset/CPU combination) has been having the same issue since early 2011 (the entire life span of the system), always running a recent snapshot: http://www.supermicro.com/products/motherboard/ATOM/ICH9/X7SPA-HF-D525.cfm There is absolutely no sense in running a 2010 snapshot now, except for experiments as suggested by Benny. Please try and see if it makes a difference comparing reboots of the system over SSH, on the local console, over serial console, and with serial over LAN. I can provide test results over all these methods given some tech suggestion / solution. You may want to have a DMI / PCI / ACPI dumps, let me know how / if you want these from my system too (attach brief newbie instructions please). So far, nothing has solved it yet for me too, except power cycle via the PSU breaker each time this happens. Never tried any other OS except OpenBSD, thought it was the hardware (memory by the beep code) fault, but it's not (confirmed with long runs of memtest). The system runs for very long intervals without any other issues, except the reboot behaviour in the original post, confirming same problem. Running latest BIOS and IPMI firmwares. Thanks, Dewey for testing this more extensively than I had the nerve to.
