[mythtv-users] Advice on debugging crashing system needed

[Gert van der Knokke]

Craig Huff wrote:
> On 9/17/07, *Craig Huff* <huffcslists at gmail.com 
> <mailto:huffcslists at gmail.com>> wrote:
>
>     I would agree, but this system is < 2 months old.  I'm thinking
>     more along the
>     lines of a defective or infant mortality part failure.  Scans
>     through /var/log/*
>     haven't revealed anything clearly an issue, but I did find this
>     interesting:
>
>     In /var/log/Xorg.0.log.old (yesterday's log) and in
>     /var/log/gdm/:0.log.1 these
>     lines appear at the end:
>
>     AUDIT: Sun Sep 16 22:12:40 2007: 4351 Xorg: client 2 rejected from
>     local host
>     AUDIT: Sun Sep 16 22:12:40 2007: 4351 Xorg: client 3 rejected from
>     local host
>     AUDIT: Sun Sep 16 22:12:41 2007: 4351 Xorg: client 3 rejected from
>     local host
>     AUDIT: Sun Sep 16 22:12:41 2007: 4351 Xorg: client 3 rejected from
>     local host
>
>     Backtrace:
>     0: /usr/bin/Xorg(xf86SigHandler+0x81) [0x80bc151]
>     1: [0x110420]
>     2: /usr/lib/xorg/modules/drivers/nvidia_drv.so(_nv001038X+0x44)
>     [0x2d6110]
>
>     Fatal server error:
>     Caught signal 11.  Server aborting
>
>     (WW) NVIDIA(0): Failed to free video decoder object
>     (EE) NVIDIA(0): Failed to tear down DAC
>
>
>     These lines don't appear in every Xorg.0.log.* nor in every
>     gdm/:0.log.*, so I
>     wonder...
>
>     No smoking guns with lm_sensors output, either.  Core0 Temp: +75F,
>     Core1 Temp: +75F, temp1: +75F, temp2: +88F, temp3: +77F,
>     fan1: 2884 RPM.
>
>     What else might I delve into?
>
>     Craig.
>
>
> Typical.  The old saw about a watched pot...
>
> With sensors output in a loop piped to a log file and tee'd to a 
> window on the
> backend and top running in another window on the backend, I ran it all 
> evening
> without a hiccup.  Enjoyed the movie, too. ;-)  I guess I could try 
> backing the
> cooling fans down from tropical storm speed (as opposed to hurricane 
> force or
> balmy breeze) and see if I can exacerbate the problem because at this 
> point I
> have no breadcrumb trail, unless the details above are more 
> significant to a
> trained eye than they are to me.
>
> Any advice welcome.  I won't post on this again unless I find 
> something that
> looks significant or someone suggests something to look at and report 
> back on.
>
I guess you already have tried re-seating the CPU and memory modules, 
the ATX power connector(s) and such. Quite often a bad contact on one of 
these will react to temperature changes. Try running memtest for some 
time, a bad 'bit' can cause all kinds of havoc.
Assuming you use the onboard video and not the PCIe slot, otherwise 
re-seating the videocard might help too.

Good luck,

Gert

> Craig.
>
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