iMac "Black Screen" of Sorts

Discussion in 'iMac' started by fatpiggins, Jun 5, 2013.

  1. fatpiggins macrumors newbie

    Jun 5, 2013

    I am hoping you guys can help me out here. Over the past month or so, I have periodically (every few days or so) been getting a message on my iMac that tells me I have to hard restart. It shows up in the middle of the screen in black and the message is repeated in a few other languages. At this point, the rest of the screen, while not black, is frozen. I've been reading that others have had this problem, but that it seems it varies from case to case as to the exact problem. I should also note that this is not a complete black screen, unlike some other problems I've read about; instead, it's a small black textbox.

    Also, the computer is about 2.5 years old and is beyond warranty at this point.

    Below I am going to paste the error report message I got upon reboot. I hope the formatting isn't too crazy. Any help or suggestions would be much appreciated. Thanks in advance. Matt

    Interval Since Last Panic Report: 634834 sec
    Panics Since Last Report: 2
    Anonymous UUID: 7FE88B6D-7E0C-44F6-A89B-1BEAFAF25332

    Wed Jun 5 20:35:51 2013
    panic(cpu 0 caller 0x4acd1c): "m_free: freeing an already freed mbuf"@/SourceCache/xnu/xnu-1504.15.3/bsd/kern/uipc_mbuf.c:2888
    Backtrace (CPU 0), Frame : Return Address (4 potential args on stack)
    0x5c753e48 : 0x21b837 (0x5dd7fc 0x5c753e7c 0x223ce1 0x0)
    0x5c753e98 : 0x4acd1c (0x5d43d4 0x0 0x9ed5770 0x3254ae)
    0x5c753ed8 : 0x4ad03d (0x57af2100 0x1 0x874f04 0x722b984)
    0x5c753ef8 : 0x32232b (0x57af2100 0x57af2100 0x5796a816 0x5c753f4c)
    0x5c753f68 : 0x3226fd (0x0 0x57af2100 0x0 0x722b9ac)
    0x5c753fc8 : 0x2a179c (0x722b984 0x0 0x2a17ab 0x70cc3a4)

    BSD process name corresponding to current thread: kernel_task

    Mac OS version:

    Kernel version:
    Darwin Kernel Version 10.8.0: Tue Jun 7 16:33:36 PDT 2011; root:xnu-1504.15.3~1/RELEASE_I386
    System model name: iMac10,1 (Mac-F2268CC8)

    System uptime in nanoseconds: 263725084277076
    unloaded kexts: 207.11 (addr 0x5bc9f000, size 0x36864) - last unloaded 52154279133733
    loaded kexts:
    com.seagate.driver.PowSecLeafDriver_10_5 5.2.3
    com.seagate.driver.PowSecDriverCore 5.2.3 54.3 - last loaded 53641440030660 2.1.0 100.12.31 1.9.3d0 1.57 3.5.7 1.0.20 1.2.0 6.3.6 17 7.0.0 2.0.5f14 6.3.6 1.1.6 2.0.5f14 2.0.17 170.0.46 425.14.7 4.7.0a1 1.5.1 303.8 2.6.1 2.6.8 1.6.4 4.2.4 31.1 1.0.0d1 4.7.3 1.4.0 2.1.7 4.2.4 4.2.0 1.3.1 1.5 1.3.6 1.7 1.3.6 1.4 142.6.0 1 0 2.1.14 142.6.0 207.11 141.5 141.5 2.4.5f3 17 10 14 10 10 20 74.2 2.4.5f3 10.0.3 2.0.5f14 1.8.3fc2 1.3 1.0.10d0 1.0.1 6.3.6 6.3.6 2.0.3 41 2.0.5f14 2.0.5f14 320.1 1.10 2.2.7 3.1.0d5 4.7.0a1 1.0.10d0 2.2.1 2.2.1 2.4.5f3 2.4.5f3 2.4.5f3 4.2.0 2.6.8 1.6 1.6 1.6.1 2.6.7 4.2.4 3.9.0 402.1 2.1.0 4.0.6 2.6.8 1.2.6 2.6.8 4.2.4 4.2.6 2.0.6 4.2.4 1.4.0 1.6.6 1.1 6 1.0.0d1 289 1.6.3 1.3.6 2.6.5 1.3.0
    Model: iMac10,1, BootROM IM101.00CC.B00, 2 processors, Intel Core 2 Duo, 3.06 GHz, 4 GB, SMC 1.52f9
    Graphics: ATI Radeon HD 4670, ATI Radeon HD 4670, PCIe, 256 MB
    Memory Module: global_name
    AirPort: spairport_wireless_card_type_airport_extreme (0x168C, 0x8F), Atheros 9280:
    Bluetooth: Version 2.4.5f3, 2 service, 19 devices, 1 incoming serial ports
    Network Service: AirPort, AirPort, en1
    Serial ATA Device: ST31000528ASQ, 931.51 GB
    Serial ATA Device: PIONEER DVD-RW DVRTS09
    USB Device: Backup+ Mac SL, 0x0bc2 (Seagate LLC), 0xa013, 0x24100000 / 3
    USB Device: Built-in iSight, 0x05ac (Apple Inc.), 0x8502, 0x24400000 / 2
    USB Device: Internal Memory Card Reader, 0x05ac (Apple Inc.), 0x8403, 0x26500000 / 4
    USB Device: FreeAgent GoFlex, 0x0bc2 (Seagate LLC), 0x5031, 0x26200000 / 3
    USB Device: iPhone, 0x05ac (Apple Inc.), 0x12a8, 0x26400000 / 2
    USB Device: IR Receiver, 0x05ac (Apple Inc.), 0x8242, 0x04500000 / 2
    USB Device: BRCM2046 Hub, 0x0a5c (Broadcom Corp.), 0x4500, 0x06100000 / 2
    USB Device: Bluetooth USB Host Controller, 0x05ac (Apple Inc.), 0x8215, 0x06110000 / 5
  2. Jexta macrumors member

    Apr 11, 2011
    I'm not going to pretend I understand the error report, but what you are experiencing is called a "Kernel Panic". It is normally related to corrupt software, a faulty hard drive or faulty RAM chips.

    As a technician, diagnosing the cause of your problem would begin with the following;

    1. Boot from a known good OS, or if you don't have access to an alternate boot method, re-install from the disc or recovery partition. If problem persists move to step two.

    2. Having eliminated the software as a cause of the fault we can move on to hardware. Try isolating your RAM chips. Test each individually, in each available slot. You may find the kernel panic only occurs with one particular chip, or when a chip is in a particular slot. Test also with known good RAM modules if possible.

    3. If the RAM chips yielded no results, then the HDD is a likely cause. Have a look around for HDD scanning programs (TechTools being one) and see if your HDD is failing/has bad blocks etc.

    4. If none of the above solve the issue, it may well be a faulty logic board, or other failing component causing the kernel panic, so I would suggest an AASP or Apple Store for complete diagnosis.
  3. justperry macrumors G3


    Aug 10, 2007
    In the core of a black hole.
    If I were you I would first use the Mac without anything attached, except for maybe bluetooth keyboard/mouse/trackpad, it seems to me you have a lot connected.

    But, it might be the ones in bold to look at, uninstall these first and look if that makes a difference.

    The issue you have is called a Kernel Panic, or in easier words, your Mac crashed and can't recover from it, this is different from a "normal" Application crash, when this happens the System won't crash.
  4. macthefork, Jun 7, 2013
    Last edited: Jun 7, 2013

    macthefork macrumors 6502

    Feb 2, 2013
    Yes, it's a Kernel Panic. How are you connected to the internet? The Panic seems to be caused by ethernet or wifi possibly the wifi card itself (or if ethernet, the built-in ethernet.)

    If you are using a router, there could be a problem there, but it's likely a hardware issue. Try connecting to the internet differently, such as if you're connected through wifi now, try turning off wifi and connecting with an ethernet cable.

    The recommendations about removing all USB externals in the above post by justperry could also help.

    This is the key information from your panic report:
    "m_free: freeing an already freed mbuf"

    Try placing that in google to see other responses to this kernel panic.
  5. scotpole macrumors member

    Apr 4, 2006
    Kernel Panics

    2008 iMac, 4Gb, 640Gb hd in two 320Gb partitions 10.8.3 HD 1, 10.5.? HD2
    Over the last couple of weeks I have been experiencing a lot of Kernel panics on my iMac.
    First, I updated Lion to Mountain Lion and went through the updates. Next I updated Office to Office 11 and removed Office 2008. I command-r ed on start-up and repaired permissions and disk several times. I backed up my files and replaced an old La Cie drive with a new seagate which I zeroed out before time machine designation.
    What I thought the problem was, was the Intego virus suite. This was on my 10.5 OS X partition. I had accessed this partition to get Quicken 2007 information for taxes. I crashed on this partition as well as on the updated Mountain Lion partition.
    When I crashed on the Mountain Lion partition, the log seemed to indicate that Intego had loaded before the operating system. After this I removed Intego form the 10.5 partition.
    Today the computer crashed again. This was the first crash in Mountain Lion since a reinstallation over the weekend. I had been running Excel then I opened up iBank and when closing a window in iBank, the kernel panicked. Everything crashed. NVDIA was mentioned in the crash log.
    Since Apple decided to save money by not providing a startup DVD, I am a little baffled. What I would like to do is to run a defragment utility, but I do not know how to do this in the Command R environment.
    This is a four or five year old computer. When do I look for a hardware failure and rule out software?
  6. macthefork macrumors 6502

    Feb 2, 2013
    Disk Defragment utilities aren't really needed in OS X, and are not available on Disk Utility. Yet, they are available in utilities such as Tech Tools Pro.

    It would help to see the actual kernel panic log. Where was NVIDIA mentioned in the crash report? GPU drivers, such as for the NVIDIA GPU would be mentioned in the entire report as one of the loaded loaded kernel extensions.

    Have you tried running a Hardware test off your original iMac Disks? Wasn't 10.5 originally installed on that imac? They came with the DVDs

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