good thinking yet alas! everything worked out ok.

 $ sudo memtester 1024 5
[sudo] password for bmike1:
memtester version 4.3.0 (64-bit)
Copyright (C) 2001-2012 Charles Cazabon.
Licensed under the GNU General Public License version 2 (only).

pagesize is 4096
pagesizemask is 0xfffffffffffff000
want 1024MB (1073741824 bytes)
got  1024MB (1073741824 bytes), trying mlock ...locked.
Loop 1/5:
  Stuck Address       : ok
  Random Value        : ok
  Compare XOR         : ok
  Compare SUB         : ok
  Compare MUL         : ok
  Compare DIV         : ok
  Compare OR          : ok
  Compare AND         : ok
  Sequential Increment: ok
  Solid Bits          : ok
  Block Sequential    : ok
  Checkerboard        : ok
  Bit Spread          : ok
  Bit Flip            : ok
  Walking Ones        : ok
  Walking Zeroes      : ok
  8-bit Writes        : ok
  16-bit Writes       : ok

Loop 2/5:
  Stuck Address       : ok
  Random Value        : ok
  Compare XOR         : ok
  Compare SUB         : ok
  Compare MUL         : ok
  Compare DIV         : ok
  Compare OR          : ok
  Compare AND         : ok
  Sequential Increment: ok
  Solid Bits          : ok
  Block Sequential    : ok
  Checkerboard        : ok
  Bit Spread          : ok
  Bit Flip            : ok
  Walking Ones        : ok
  Walking Zeroes      : ok
  8-bit Writes        : ok
  16-bit Writes       : ok

Loop 3/5:
  Stuck Address       : ok
  Random Value        : ok
  Compare XOR         : ok
  Compare SUB         : ok
  Compare MUL         : ok
  Compare DIV         : ok
  Compare OR          : ok
  Compare AND         : ok
  Sequential Increment: ok
  Solid Bits          : ok
  Block Sequential    : ok
  Checkerboard        : ok
  Bit Spread          : ok
  Bit Flip            : ok
  Walking Ones        : ok
  Walking Zeroes      : ok
  8-bit Writes        : ok
  16-bit Writes       : ok

Loop 4/5:
  Stuck Address       : ok
  Random Value        : ok
  Compare XOR         : ok
  Compare SUB         : ok
  Compare MUL         : ok
  Compare DIV         : ok
  Compare OR          : ok
  Compare AND         : ok
  Sequential Increment: ok
  Solid Bits          : ok
  Block Sequential    : ok
  Checkerboard        : ok
  Bit Spread          : ok
  Bit Flip            : ok
  Walking Ones        : ok
  Walking Zeroes      : ok
  8-bit Writes        : ok
  16-bit Writes       : ok

Loop 5/5:
  Stuck Address       : ok
  Random Value        : ok
  Compare XOR         : ok
  Compare SUB         : ok
  Compare MUL         : ok
  Compare DIV         : ok
  Compare OR          : ok
  Compare AND         : ok
  Sequential Increment: ok
  Solid Bits          : ok
  Block Sequential    : ok
  Checkerboard        : ok
  Bit Spread          : ok
  Bit Flip            : ok
  Walking Ones        : ok
  Walking Zeroes      : ok
  8-bit Writes        : ok
  16-bit Writes       : ok

Done.
$


On Sun, Nov 5, 2017 at 5:16 AM, Michael Below <below@judiz.de> wrote:

> Hey,
> just a tip: this might also be a matter of bad RAM, try a memory test.
> Cheers
> Michael
>
> Am 4. November 2017 21:31:13 MEZ schrieb Michael <bmike1@gmail.com>:
>>
>> As I run darktable it seems to suddenly reboot my system. I almost said
>> crash but I guess it is a mini crash. Last time this happened I ran it
>> about 15 minutes. I edited one image and moved on to the next when suddenly
>> it goes 'poof'. As it warms up it happens more frequently so I was thinking
>> it was my video card. 'sensors' said (after the reboot):
>>
>> bmike1@MikesBeast ~ $ modprobe k10temp
>> bmike1@MikesBeast ~ $ sensors
>> radeon-pci-0100
>> Adapter: PCI adapter
>> temp1:        +66.0°C
>>
>> it8718-isa-0228
>> Adapter: ISA adapter
>> in0:          +1.46 V  (min =  +0.00 V, max =  +4.08 V)
>> in1:          +1.94 V  (min =  +0.00 V, max =  +4.08 V)
>> in2:          +3.25 V  (min =  +0.00 V, max =  +4.08 V)
>> +5V:          +2.99 V  (min =  +0.00 V, max =  +4.08 V)
>> in4:          +3.10 V  (min =  +0.00 V, max =  +4.08 V)
>> in5:          +3.25 V  (min =  +0.00 V, max =  +4.08 V)
>> in6:          +4.08 V  (min =  +0.00 V, max =  +4.08 V)
>> in7:          +2.35 V  (min =  +0.00 V, max =  +4.08 V)
>> Vbat:         +3.15 V
>> fan1:        3139 RPM  (min =    0 RPM)
>> fan2:           0 RPM  (min =    0 RPM)
>> fan3:           0 RPM  (min =    0 RPM)
>> fan5:           0 RPM  (min =    0 RPM)
>> temp1:        +35.0°C  (low  = +127.0°C, high = +127.0°C)  sensor =
>> thermistor
>> temp2:        +51.0°C  (low  = +127.0°C, high = +127.0°C)  sensor =
>> thermal diode
>> temp3:        +52.0°C  (low  = +127.0°C, high = +127.0°C)  sensor =
>> thermistor
>> cpu0_vid:    +1.050 V
>> intrusion0:  ALARM
>>
>> k10temp-pci-00c3
>> Adapter: PCI adapter
>> temp1:        +48.8°C  (high = +70.0°C)
>>                        (crit = +72.0°C, hyst = +70.0°C)
>>
>>
>> Is darktable known to crash... reboot a system? As I was saying I was
>> thinking it was my video card. Is there something I need to do to access
>> the video card?
>>
>> :-)~MIKE~(-:
>>
>> ____________________________________________________________________________
>> darktable user mailing list to unsubscribe send a mail to
>> darktable-user+unsubscribe@lists.darktable.org
>> =
>
>
> ____________________________________________________________________________
> darktable user mailing list to unsubscribe send a mail to
> darktable-user+unsubscribe@lists.darktable.org
>



-- 
:-)~MIKE~(-: