On Wed, Aug 07, 2019 at 11:23:57PM +1000, terryc wrote:
> Fixed and now I'm back to chasing down HW/memory fault.
> A side benefit is that now I have a consistent way of crashing the
> system and might finally get to a working solution for this pair of
> identical AMD B350 systems.

Sounds like you're being bit by the linux on ryzen crash:

<https://bugzilla.kernel.org/show_bug.cgi?id=196683>

That thread explains what to disable in your UEFI if it's new
enough. Since I have nobody to read my UEFI screens to me (where's my
accessible speech enabled UEFI that was supposed to be so great),
disabling c6 package state seems to fix the random crashes. The only
thing I'm still trying to track down is where using the speakup screen
reader's review commands can reliably crash the machine with no errors
from the kernel in certain situations.

Greg


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