OT: Weird Hardware Problem

David Christensen dpchrist at holgerdanske.com
Tue May 19 18:23:52 UTC 2020

On 2020-05-19 06:46, Tim Daneliuk wrote:
> I was recently given a Dell Inspiron 3847 which has an i7-4790 and 16G
> of memory.  Perfect for multibooting BSD and Linux.  It needed a new power
> supply but now that this is installed, it's exhibiting a very strange
> problem.
> The machine will work for hours flawless and then - for no apparent reason -
> reboot randomly.  The former owner reports that this was also happening
> when they last had it running Win8.
> I've run very heavy loads on it with load averages up to almost 50 - no
> problem.  I've run overnight memory tests which return 0 errors.
> I've run CPU stress tests flawlessly and temperatures were fine.
> One hint here:  I can consistently force the problem to happen if I start
> a Linux installation and request full disk encryption as part of the install.
> I doubt it has anything to with encryption per se, but there is some kind
> of pattern of use that it causing the reboot.
> Has anyone else ever seen something like this and/or have resolution?
> Is there a known bug with that processor?
> My first instinct was to blame flakey memory (DDR 1600 2x8G Hynix) but -
> as I said - memory testing is flawless.
> Thoughts and ideas most welcome.

I have not seen these suggestions yet:

1.  Have you tried connecting the system drive to another port?

2.  Have you tried replacing the SATA cable?

3.  Have you tried replacing the system drive?


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