On Jun 16, 2006, at 9:33 PM, Micah wrote:

Matthew Navarre wrote:
On Jun 16, 2006, at 7:17 PM, Micah wrote:
Matthew Navarre wrote:
I've got an AMD Sempron machine running FreeBSD 6.0 that's been experiencing random panics while trying to build world. In fact it just paniced now, with no activity.
The panic message is TPTE at 0xbfc20624 IS ZERO @ VA 08100000
bad pte
This started last night while I was portupgrading ruby and I got random apps segfaulting, mostly gcc, so I suspected bad memory. I installed new memory today, tried to buildworld. And *BAM* panic: bad pte I'm still guessing that this is a hardware problem, and not software but I'm not sure. If anyone can give me a clue I'd appreciate it.
Machine details:
AMD Sempron
ECS K8M800-M2 mainboard
1 GB Kingston PC-3200.
Thanks,
Matt

First, a quick Google of "bad pte" turns up some ideas. Try disabling or changing APIC and/or ACPI settings. Make sure your swap partition is error free and has enough room. Google a bit more just on the lists.freebsd.org site for several possibilities.
Yeah, I was wondering if it might be something in the BIOS settings. I'll google around and see what I find. I don't know if the first panic was a bad pte error since the machine was running headless.

For hardware, you can try memtest86+ to check to make sure the new memory is good. There are other stress tests you can run as well - I usually use the ultimate boot CD for that stuff. Other possible problems are faulty or too small power supply; too much heat on CPU, RAM, or expansion boards; faulty expansion cards and/ or components; or faulty hard drive.
I kinda wondered if heat might be an issue, since it was kind of tucked away in a spot with bad airflow. I'll try the memtest thing. Is there a way to get the CPU temp in FreeBSD?

As mentioned, mbmon might work, but don't think that CPU is the only generator of heat. I had random reboots due to an overheating graphics card once. A spot thermometer comes in handy at a time like this.

Eh. I think it's time to find the receipt and make the computer store fix this POS. I think that's the last time I buy cheap crap hardware.

Thanks again,
Matt
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