[Bug 1071209] Re: memtest86 test #7 fails (random number sequence error)

[Dan Cundiff]

Ran into this bug today as well. I was testing some memory on an older PC. Here's my specs FWIW:
* EVGA 132-CK-NF78-A1 LGA 775 NVIDIA nForce 780i SLI ATX Intel Motherboard
* Crucial Ballistix 2GB (2 x 1GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory Model BL2KIT12864AA804
* Intel Q6600 processor

I tried many different combinations and encountered the error each time:
* All four sticks
* 2 sticks
* 1 stick
* Different timings and voltages
* Different clocking
* Different SLI profiles

I even went and bought new ram, different brand (CORSAIR XMS2 2GB (2 x
1GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop
Memory Model TWIN2X2048-6400), that was approved compatible with my
motherboard. Same issue. Then I found this bug report.

I tried memtest+ from an older 12.04 DVD I had around and there wasn't
an error. Shook my fist in the air very rapidly.

** Tags added: memtest86

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https://bugs.launchpad.net/bugs/1071209

Title:
  memtest86 test #7 fails (random number sequence error)

Status in “memtest86+” package in Ubuntu:
  Confirmed

Bug description:
  Trying to check the memory at newly bought notebook I found a bug in
  the memtest86+ version 4.20 in ubuntu 12.10, in ubuntu 12.04 it is ok.
  The bug is reported at least in Fedora and Opensuse. It is assumed
  that the bug is caused by the gcc-4.7.

  It is easily  reproducible - select the test #7 in memtest or just
  wait till it - starting from the 129Mb it will report a lot of errors.
  I have checked it on three different systems , two of them I use on a
  daily basis and would note if RAM is really bad.

  https://bugzilla.redhat.com/show_bug.cgi?id=805813

  http://lists.opensuse.org/opensuse-bugs/2012-09/msg04386.html

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