38.9 causing Kernel Panics...

Adam Albrec's Avatar

Adam Albrec

09 Jun, 2016 09:10 PM

Just did the upgrade to 38.9 and noticed a Kernel Panic every few hours of use (4 in total). All of the newer TFF versions seem more crash-prone, but this is the 1st time observing this issue.

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Unresolved kernel trap(cpu 1): 0x300 - Data access DAR=0x000000002D10C010 PC=0x00000000000AC800
Latest crash info for cpu 1:
   Exception state (sv=0x46384500)
      PC=0x000AC800; MSR=0x00009030; DAR=0x2D10C010; DSISR=0x42000000; LR=0x435DAFA0; R1=0x2D10BC10; XCP=0x0000000C (0x300 - D
-----

Have run full tests - with Techtool Pro, full RAM check with Applesjack/Memtest (no problems detected) and full Onyx twice.

Problem completely subsided when going back to earlier version (38.6.1).

at first wondered if might be the heat, but 2 of the times were at night when it was cool.

  1. Support Staff 1 Posted by Chris (chtrusch... on 11 Jun, 2016 07:39 AM

    Chris (chtrusch)'s Avatar

    Misterious. The only things I can advise here is to check your hardware again using the official Apple Hardware Test. Also, just for testing purposes, you could try to run 38.6.1 for a week or two. If there haven't been any new kernel panics, install 38.9 again and see what happens.

  2. 2 Posted by Adam Albrec on 11 Jun, 2016 04:46 PM

    Adam Albrec's Avatar

    Chris: I know that Kernel Panics are notoriously hard to pin-down, so
    not expecting any specific action or advice - just something to keep an
    eye on - if more people have it come up (like maybe paging with the
    higher RAM requirements may become an increasing problem going forward).

    This system does have a new SSD in it, that's been working really well,
    but its Sandforce, so a problem that can occur with lots of paging is
    that since a block can contain several pages, but if part of a block is
    being "Trash-Collected" the other items within the block are momentarily
    inaccessible - so in a large operation (like navigating Facebook or a
    big Blogsite), maybe this could be a problem - when lots of paging is
    occurring.

    BTW just for taking the time to reply - you might enjoy trying the last
    version of this out!!
    http://ppcluddite.blogspot.com/2016/06/new-ppc-media-center-version-6.html
    Still uses terminal windows, so CK won't care about it, but there are a
    lot of really cool new fixes and features.

    Thanks Again!!

    Adam :0)

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