[mythtv-users] a new type of error

[Jim Abernathy]

On 03/09/2018 01:38 PM, f-myth-users at media.mit.edu wrote:
> I had two identical chassis which would display that sort of error only
> under heavy simultaneous disk and network load.  I discovered this while
> first installing them and doing lots of heavy disk copying to test their
> operation.  Heavy disk activity alone, or heavy network activity alone,
> was fine.  I put an Intel ethernet NIC in a PCIe slot and stopped using
> the onboard network and the problem vanished.  My conclusion was that
> the Realtek ethernet hardware and/or drivers were garbage.  This was
> under Ubuntu 12.04, but I haven't tried verifying under newer OS's;
> I just generally steer clear of onboard mobo ethernet if it's Realtek.
>
> Did your machine take any sort of update recently that might have
> changed its device drivers?  Alternately, you may have failing caps
> on the motherboard somewhere that are leading to erratic operation,
> possibly combined with high current draw---not necessarily overall
> draw, but only in one subsystem of the board.  How old is this hardware?
> Does a visual inspection show any bulging/leaking caps?  (This is not
> sufficient---they may be bad but visually fine---but if they're bad
> visually, you probably have an issue.)
>
> Others have suggested PSU issues; if it's easy to replace, try it.
> Otherwise, and if no software at all has changed, you might try testing
> whether it's one of these "this plus that" load issues, as above, which
> may ultimately require you to recap/replace your motherboard.  Again,
> only if no software has changed in the interim---but you say you've
> done some updating, so check stuff relevant to the OS and its drivers.
> I don't suppose you can roll back in any way?

I changed out the 450 watt supply for a 650 watt and I changed the 
motherboard to a newer one with a Core i7-3770K.

We'll see if I get any NMI errors in the next few days.

Jim A

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