Random panics on FreeeBSD 6.0

Matthew Navarre mnavarre at cox.net
Sat Jun 17 03:13:18 UTC 2006

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?

Meh. let's see if this thing'll actually compile...

Thanks, Micah


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