On 22/09/10 23:37, Soren Kristensen wrote:
> Our experience is that 9 out of 10 times issues with stability is either
> problems with the power supply or with the software, especially Linux as
> it seems to have taken long time for a stable VT6105M Linux driver to
> show up....
>
> If it's one of the very few instances where it's a hardware issue just
> contact [email protected] to request service, if under warranty it will be
> replaced or repaired at no charge. But try another power supply first,
> and if running Linux, ensure you have the stable drivers.

I have similar problems with my 5501 crashing very frequently. I've 
tried two separate power supplies without effect.

Some questions to everyone out there:

- Does anyone know as from which kernel version the VT6105M (aka 
via-rhine) driver is believed to be stable? I've been looking through 
the git history of this file but can't find anything recent that looks 
like it might explain crashes.

- One data point: when my machine crashes there is no backtrace. So it's 
a hard lock-up.

- When I remove the mini-PCI wifi card the machine becomes rock-solid. 
I've tried with two different wifi cards, one needing the ath5k driver, 
the other needing ath9k. Those are the only card types I have, but the 
machine crashes with either. So this leads me to the following questions:

- Could this be an EMI problem? Would it make sense for me to rig up 
some shielding between the mini-PCI card and the two Ethernet 
controllers that sit immediately underneath?

- Could this be a decoupling issue? Does anyone have suggestions as to 
capacitors to add or change?

Thanks, Jan
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