[Bug 878063] Re: Can't set memory maximum

Thomas Hood 878063 at bugs.launchpad.net
Thu Oct 20 13:21:32 UTC 2011


After further research I realized that memtest86+ is probably testing
real memory at "4096M": the highest installed geeg has presumably been
mapped at  4MiB - 5MiB.  So the errors being found are probably real in
some sense.

So I shouldn't have linked this report to Debian report #503860.

But this doesn't change the fact that I'd like to exclude this range and
"c | Address Range | Set Upper Limit" doesn't work.  Or I don't know how
it is supposed to work.

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https://bugs.launchpad.net/bugs/878063

Title:
  Can't set memory maximum

Status in “memtest86+” package in Ubuntu:
  New
Status in “memtest86+” package in Debian:
  Unknown

Bug description:
  When I run memtest86+ on a ThinkPad X61 with 4 GiB memory, memtest
  reports failures at locations starting with "4096M".  Makes sense,
  since there is no memory above 4096 MiB.

  Printing out all the errors slows down the program a lot.  I would
  like to skip testing the non-existent memory.

  However (and this is the bug), pressing "c", "2", "2" (i.e., Test
  Address Range | Set Upper Limit) and attempting to change the memory
  range reveals bugs.  It seems to be impossible to enter 4096 MiB as
  the maximum. I tried various strings such as "4096m" (can't enter
  capital letters) and "4294967296" but the program didn't interpret
  these correctly.

  memtest86+ v.40 run immediately after upgrade to oneiric

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