[mythtv-users] Random system freezes -- clueless

Mike Hodson mystica at gmail.com
Fri Dec 18 02:06:37 UTC 2015


On Thu, Dec 17, 2015 at 5:31 PM, Craig Huff <huffcslists at gmail.com> wrote:
> My Myth system has a bad habit of freezing, except when I'm doing something
> on it.

If you don't have a dedicated hardware device for the watchdog, there
won't be any resurrecting a box if the cpu has errored in a way that
is causing this sort of problem.  A software watchdog is reliant on
the cpu still processing -something-, and is only useful if the kernel
can execute at all. You are describing full system hang.

How new is the system? If old, perhaps something is wearing out that
didn't happen when it was new.  Try running memtest86+ for about a day
straight (not kidding) and GIMPS/mprime on 'small fft' mode for a few
hours. These 2 tests are my go-to for 'is memory failing' 'is cpu
itself failing or is my overclock stable' etc.

And if youve tried memtest86 for maybe 1 pass... errors in ram can
sometimes elude detection for many many passes, yet still cause daily
problems. Literally it took 17 hours for my system to show even 1
error. another 3 hours to show the second.  Of note, trying to compile
GCC caused the compile to fail in many differing points of the
compile, nearly always internal compiler exceptions; a few times the
system hung.

Mike


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