Random panics on FreeeBSD 6.0

Matthew Navarre mnavarre at cox.net
Sat Jun 17 07:33:19 UTC 2006

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,

More information about the freebsd-questions mailing list