Thanks Jonathan,

Great idea! I'll give that a try. Yesterday I ran EMC2 all day and it 
didn't shut down. Grrrr...

Andy

Jonathan / Hydra wrote:
> You could also test running prime95 in stress test mode to try to see if 
> there's a hardware failure, it will compute mersenne primes and compare 
> with a table of known-good values. Flaky hardware will either lock up 
> the computer or report as a computational error. Do note that it really 
> will strain your hardware, primarily the cpu, memory controller and ram. 
> Usually a 24 hour run is long enough to show any hardware issues.
> 
> http://www.mersenne.org/freesoft.htm
> 
> On Tue, Jun 24, 2008 at 1:51 AM, Andrew Ayre <[EMAIL PROTECTED] 
> <mailto:[EMAIL PROTECTED]>> wrote:
> 
>     Thanks Chris and Jon,
> 
>     Because I've rebooted the PC twice since the problem, I no longer have
>     an Xorg log file for when the problem happened. So I'll wait until it
>     shows up again and then take a look.
> 
>     I didn't touch the keyboard - I was watching the CNC machine when it
>     happened the first time, then I let EMC2 run some g-code over and over
>     again (no machine attached) and while I was out on errands it happened
>     again.
> 
>     Running memtest86+ now.
> 
>     Andy
> 
>     Jon Elson wrote:
>      > Andrew Ayre wrote:
>      >> I have noticed that perhaps one time in five Linux will partially
>      >> shutdown during milling. It's a bit hard to describe but the Gnome
>      >> desktop is replaced with a text screen of what looks like the
>     tail end
>      >> of the bootup sequence:
>      >>
>      >> Operation  [OK]
>      >> Another operation [OK]
>      >> Running startup scripts in /etc/rc.local [OK]
>      >>
>      >> There are no messages and EMC2 continues to generate pulses - which
>      >> cause the X and Y axis to move the spindle in a straight line. A
>     quick
>      >> press of the power button turns off the power.
>      >>
>      >> I booted and checked dmesg, user.log, syslog and messages.
>     Nothing was
>      >> recorded to indicate a problem. The syslog only had the 30
>     minute marks
>      >> in it.
>      > This may be a crash of the X-windows server.  You didn't, by any
>      > chance, hit Ctrl-Alt-Backspace?  That is the command to kill the
>      > X server.  If X is actually crashing, the message file is in
>      > /var/log/XFree86.0.log  and may show some useful info.
>      >
>      > Jon
> 
>     --
>     Andy
>     PGP Key ID: 0xDC1B5864
> 
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