On Thu 18 Feb 2016 02:29:32 NZDT +1300, Kent Fredric wrote: > Did you try swapping the order of your ram cards? That can alleviate > certain kinds of "Loaded into fixed address that happened to be > broken" problems. > > And see if you can borrow some friends ram of the same size and try it > independently.
Awkward!! Don't borrow RAM, only swap around what you have. Memory faults can be awkward to find, especially when they're sporadic. In my case Linux would just panic every few weeks. More often over course of 18 months. Memtest86 never ever found anything wrong with any of the 4 4GB modules. Swapping them around or removing 2 of 4 in any combination made no difference. Then I tried memtester http://pyropus.ca/software/memtester/ because it runs in user-space and it's possible to keep working. Some memory module combinations made the kernel crash(!), which should never happen with this kind of test. The crashes were more immediate with a certain module order, and all 4 inserted(!). The facts marked (!) are a giveaway for a faulty memory controller, in this case located inside an AMD CPU. All 4 memory modules are fine and working rock-solid for 16 months now on a new mobo. So thumbs-down for memtest86... Memory faults are notoriously difficult to find. You have to find a way to trigger them, then replace components until the fault goes away reliably (mark the removed components when that happens). If you can't trigger the fault fast or easily you will get frustrated. If any mem tester program finds a fault it is also not easy to find which module it is in. I read in later Linux versions it is impossible to reverse the memory address translation so a program address can't be reversed to a physical address, which probably needs BIOS info anyway to track to a module slot. Swapping modules is easier/faster and more reliable. HTH, Volker -- Volker Kuhlmann http://volker.top.geek.nz/ Please do not CC list postings to me. _______________________________________________ Linux-users mailing list [email protected] http://lists.canterbury.ac.nz/mailman/listinfo/linux-users
