[mdlug] hanging machine kernel panic - on going

[Joe Doehler]

On 2/27/2012 8:57 PM, Gmail-otakurider wrote:
> Here is the messages dump - check around 16:53 anyone have any
> ideas? checked memory tested ok - checked HDD tested ok
>
> Yes I know its long but wanted to give all info

You have evidently already checked the most obvious possibilities, so
here are some more uncommon ones. In your shoes, I would check/do a few
other things.

1-
> Feb 27 11:18:52 kuza avahi-daemon[2006]: Invalid query packet.
 > Feb 27 11:19:32 kuza last message repeated 26 times
 > Feb 27 11:19:32 kuza avahi-daemon[2006]: Invalid query packet.

I would disable "avahi". If a network is configured properly, it should
not be needed. It can cause problems if you have both Microsoft and
Apple devices on your network; they have incompatible responses to a
network that they think is ill.

2-
> Feb 27 20:49:43 kuza kernel: ACPI: Unable to derive IRQ for device
> 0000:00:04.0

I would try disabling any power management. I would try to see what that
device (0000:00:04.0) is; do "lspci" and see if what is returned matches
what is actually plugged in. Take out that device if possible to check
if stability returns; could be a bad device or a bad driver.

3-
Memory problems are often misdiagnosed when a machine operates in
Protected Mode. Because of its complicated logic, the MMU onboard the
CPU chip is frequently the first thing to misfire when the CPU gets too
hot, making it look like memory problems. To what extent the MMU was
stressed during your "memory" check depends on the software doing the
checking. So, check the chip temperature. Can you do that while the
machine is busy?

4-
Disconnect USB devices. If more than one USB device is connected with a
hub w/o its own power, more current may be drawn than any one USB plug
is capable of delivering, causing severe crashes. This can happen even
w/o a hub.

I don't claim to have the answers, but I hope this helps.

Joe.