Re: [DNG] Solved Re: Upgrade lockedup-How To fix

[Gregory Nowak]

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:



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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[DNG] Solved Re: Upgrade lockedup-How To fix

[terryc]

On Wed, 7 Aug 2019 17:13:50 +1000
"Ralph Ronnquist \(rrq\) via Dng"  wrote:

...snip..
> 
> Maybe there's a spurious back-quote in /etc/default/grub ?

Bingo. Thanks all who replied.

The successive posts jogged my brain to look again and the May-2019
date reminded me that I had actually changed /etc/default/grub to
modify the Grub-Commandline to include some parameters to try and fix
the hardware bug with the AMD B350 motherboard, but apparently
neglected to  run the update-grub command.

So when the last update/upgrade sequence relegated a linux-image, a
mismatched quote showed its hand.

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.
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