Internet Freezing/Kernel Panic - iMac or Bell Issue?

Discussion in 'iMac' started by CLegros, May 12, 2014.

  1. CLegros, May 12, 2014
    Last edited: May 12, 2014

    CLegros macrumors newbie

    May 12, 2014
    I have 3 year old 21" iMac.

    About a year ago Bell replaced my white modem with the black Sagemcom 2864. (Everything worked perfectly before this.) The internet started freezing when I was surfing or streaming. Sometimes the entire computer froze, (mouse included) and I was forced to do a hard shut-down. Sometimes I would get a kernel panic too. Sometimes I could just put it to sleep for a second and then it would work again.

    I called Bell a dozen times over 6 months, had the modem replaced with another black modem, same issue. Sometimes it freezes up my computer 3x or more a day. After a dozen calls and a second modem, Bell said it's not them.

    So I called iCare a dozen times and dragged my desktop into Apple FOUR times. Because of the kernel panics, a lot of the experts agreed that it must be the computer. They ran every test under the sun, like 10x. The motherboard was replaced and engineers ran tests from California - they could not duplicate the problem.

    I bought a UPS to see if it was something to do with the power levels coming into my house. Nope.

    Now what?? Any suggestions? Could it be the modem model? What else am I missing here? Anyone else have these issues?

    Would love some help or advice on this!

    P.S… Some of the trouble-shooting already completed: All upgrades. A complete erase/reset of my computer. Logged in under another user. Logic board replaced.
  2. Weaselboy Moderator


    Staff Member

    Jan 23, 2005
    This sounds like a hardware issue with your Mac. There is no way the modem would cause a KP like that. When you get the KP can you capture the Console log entry for the crash and post it up here? Maybe with that info we can help you troubleshoot.
  3. CLegros thread starter macrumors newbie

    May 12, 2014
    Internet Freezing/Kernel Panic - iMac or Bell Issue?

    Logic board has been replaced.

    Here's a KP from May 12:

    Interval Since Last Panic Report: 338702 sec
    Panics Since Last Report: 1
    Anonymous UUID: D5341D3D-45C7-4741-9A4F-AC667640CD29

    Mon May 12 19:19:47 2014
    Panic(CPU 0): Unresponsive processor, TLB state:0
    RAX: 0x00000000ffffffff, RBX: 0x0000000000000003, RCX: 0xffffff800c568d10, RDX: 0xffffff800084305c
    RSP: 0xffffff8060fc3c60, RBP: 0xffffff8060fc3c70, RSI: 0xffffff8060584000, RDI: 0xffffff804b7ef004
    R8: 0x0000000000000001, R9: 0x0000000000000005, R10: 0x0000000000000001, R11: 0xffffff7f810410e2
    R12: 0x0000000000002710, R13: 0x0000000000007000, R14: 0xffffff804b7ef004, R15: 0x0000000000000000
    RFL: 0x0000000000000286, RIP: 0xffffff7f80bfbf47, CS: 0x0000000000000008, SS: 0x0000000000000010
    Backtrace (CPU 0), Frame : Return Address
    0xffffff800010bf50 : 0xffffff80002d76f6
    0xffffff800010bf80 : 0xffffff80002d0322
    0xffffff800010bfd0 : 0xffffff80002e40d2
    0xffffff8060fc3c70 : 0xffffff7f80bd8d9a
    0xffffff8060fc3ce0 : 0xffffff7f80c25dbb
    0xffffff8060fc3d00 : 0xffffff7f80c25e45
    0xffffff8060fc3d20 : 0xffffff7f80c26e37
    0xffffff8060fc3d90 : 0xffffff7f80bd26ab
    0xffffff8060fc3e20 : 0xffffff7f80bcae57
    0xffffff8060fc3e60 : 0xffffff7f80bfd4d8
    0xffffff8060fc3e80 : 0xffffff7f80bc8865
    0xffffff8060fc3eb0 : 0xffffff7f80b84821
    0xffffff8060fc3ed0 : 0xffffff800053be3c
    0xffffff8060fc3f10 : 0xffffff800053b31f
    0xffffff8060fc3f60 : 0xffffff800053afc5
    0xffffff8060fc3fa0 : 0xffffff80002c8527
    Kernel Extensions in backtrace (with dependencies):>0xffffff7f80cb7fff
    Kernel Extensions in backtrace (with dependencies):>0xffffff7f80cb7fff

    BSD process name corresponding to current thread: kernel_task

    Mac OS version:

    Kernel version:
    Darwin Kernel Version 10.8.0: Tue Jun 7 16:32:41 PDT 2011; root:xnu-1504.15.3~1/RELEASE_X86_64
    System model name: iMac12,1 (Mac-942B5BF58194151B)

    System uptime in nanoseconds: 5253023195054
    unloaded kexts: 4.2.5 (addr 0xffffff7f8132b000, size 0x65536) - last unloaded 81130372602
    loaded kexts: 1.6.3 - last loaded 15434065532 2.1.0 54.3 1.9.3d0 100.12.31 1.2.0 2.0.8f3 2.0.8f3 3.5.7 1.0.26 1.57 6.4.2 7.0.0 1.1.6 4.7.0a1
    1.5.1 170.0.48 1.5.2d10 6.4.2 6.4.2 6.4.2 426.35.3 2.6.9 2.6.1 303.8 1.6.6 31.1 1.0.0d1 4.7.7 4.2.5 1.4.0 2.2.0 3.0.8b2 4.2.6 1.3.6 1.3.1 1.5 1.7 1.3.6 1.4 142.6.0 1 0 2.1.14 142.6.0 141.5 141.5 2.4.5f3 207.11 17 2.0.8f3 10 14 10 10 20 1.0.10d0 2.0.4 74.2 2.4.5f3 10.0.3 2.0.8f3 2.0.8f3 1.8.3fc2 1.3 3.0.17 41
    4.7.0a1 1.0.10d0 3.0.17 1.0.2 3.1.0d5 1.1.3 1.1.3 6.4.2 6.4.2 2.2.1 2.2.1 320.1 1.5.9 1.5.9 1.5.9 1.2.1
    2.4.5f3 2.4.5f3 2.4.5f3 2.6.9 1.6 1.6 1.6.1 2.6.9 2.6.7 1.2.6 2.6.9 4.2.5 4.2.5 3.9.0 402.1 1.3.2 1.7.4 4.2.7 4.2.4 2.0.7 1.10 4.2.6 1.4.0 1.6.6 1.1 1.0.0d1 6 289 1.6.3 1.3.6 2.6.8 1.3.0
    Panic(CPU 1): Unresponsive processor, TLB state:0
    RAX: 0x000000007e014360, RBX: 0xffffff800be7d880, RCX: 0x0000000000000000, RDX: 0x0000000000000001
    RSP: 0xffffff80603ab710, RBP: 0xffffff80603ab760, RSI: 0x0000000000000004, RDI: 0xffffff800be0e000
    R8: 0x0000000000000001, R9: 0x0000000000000000, R10: 0xffffff80603ab9f0, R11: 0xffffff7f8100936e
    R12: 0xffffff800be94e00, R13: 0xffffff800085ae38, R14: 0x0000000000000104, R15: 0xffffff800be0e000
    RFL: 0x0000000000000282, RIP: 0xffffff7f81304cbc, CS: 0x0000000000000008, SS: 0x0000000000000010
    Backtrace (CPU 1), Frame : Return Address
    0xffffff805aa28f50 : 0xffffff80002d76f6
    0xffffff805aa28f80 : 0xffffff80002d0322
    0xffffff805aa28fd0 : 0xffffff80002e40d2
    0xffffff80603ab760 : 0xffffff7f8130676e
    0xffffff80603ab7c0 : 0xffffff7f80ff7fd2
    0xffffff80603ab880 : 0xffffff7f80ff8ae3
    0xffffff80603ab9d0 : 0xffffff800053c225
    0xffffff80603aba40 : 0xffffff7f80ffb3c0
    0xffffff80603abae0 : 0xffffff7f810000ea
    0xffffff80603abb60 : 0xffffff7f80fff386
    0xffffff80603abbc0 : 0xffffff7f812ebce1
    0xffffff80603abc10 : 0xffffff7f80ff7dc2
    0xffffff80603abd10 : 0xffffff7f81305c76
    0xffffff80603abdd0 : 0xffffff7f81306bab
    0xffffff80603abe80 : 0xffffff7f8130726b
    0xffffff80603abea0 : 0xffffff7f81300769
    0xffffff80603abed0 : 0xffffff800053be3c
    0xffffff80603abf10 : 0xffffff800053b31f
    0xffffff80603abf60 : 0xffffff800053afc5
    0xffffff80603abfa0 : 0xffffff80002c8527
    Kernel Extensions in backtrace (with dependencies):>0xffffff7f812f3fff
    Kernel Extensions in backtrace (with dependencies):>0xffffff7f81313fff

    BSD process name corresponding to current thread: kernel_task
    panic(cpu 2 caller 0xffffff80002251fb): "TLB invalidation IPI timeout: " "CPU(s) failed to respond to interrupts, unresponsive CPU bitmap: 0x3, NMIPI acks: orig: 0x0, now: 0x2"@/SourceCache/xnu/xnu-1504.15.3/osfmk/x86_64/pmap.c:2741
    Backtrace (CPU 2), Frame : Return Address
    0xffffff806020a250 : 0xffffff8000204d15
    0xffffff806020a350 : 0xffffff80002251fb
    0xffffff806020a3c0 : 0xffffff800022691f
    0xffffff806020a440 : 0xffffff800021b545
    0xffffff806020a4b0 : 0xffffff80002184b1
    0xffffff806020a5b0 : 0xffffff80002188b3
    0xffffff806020a5e0 : 0xffffff8000215883
    0xffffff806020a610 : 0xffffff8000205dc9
    0xffffff806020a630 : 0xffffff80004f6f56
    0xffffff806020a660 : 0xffffff80004f6e91
    0xffffff806020a690 : 0xffffff8000545c75
    0xffffff806020a7b0 : 0xffffff8000545eb5
    0xffffff806020a7e0 : 0xffffff7f808b4c6b
    0xffffff806020a850 : 0xffffff7f80872434
    0xffffff806020a880 : 0xffffff7f80854b17
    0xffffff806020a8c0 : 0xffffff7f80852e76
    0xffffff806020a8f0 : 0xffffff7f808860de
    0xffffff806020a950 : 0xffffff7f80898e8b
    0xffffff806020a990 : 0xffffff7f80893272
    0xffffff806020a9f0 : 0xffffff7f8085a288
    0xffffff806020aa20 : 0xffffff7f808912ec
    0xffffff806020aa60 : 0xffffff7f8085e0bd
    0xffffff806020ab40 : 0xffffff7f8085a948
    0xffffff806020aba0 : 0xffffff80
    Model: iMac12,1, BootROM IM121.0047.B1F, 4 processors, Intel Core i5, 2.5 GHz, 4 GB, SMC 1.71f22
    Graphics: AMD Radeon HD 6750M, AMD Radeon HD 6750M, PCIe, 512 MB
    Memory Module: global_name
    AirPort: spairport_wireless_card_type_airport_extreme (0x168C, 0x9A), Atheros 9380:
    Bluetooth: Version 2.4.5f3, 2 service, 19 devices, 1 incoming serial ports
    Network Service: AirPort, AirPort, en1
    Serial ATA Device: ST3500418AS, 465.76 GB
    Serial ATA Device: HL-DT-STDVDRW GA32N
    USB Device: FaceTime HD Camera (Built-in), 0x05ac (Apple Inc.), 0x850b, 0xfa200000 / 3
    USB Device: Hub, 0x0424 (SMSC), 0x2514, 0xfa100000 / 2
    USB Device: Mass Storage, 0x058f (Alcor Micro, Corp.), 0x6387, 0xfa130000 / 6
    USB Device: My Passport 0748, 0x1058 (Western Digital Technologies, Inc.), 0x0748, 0xfa120000 / 5
    USB Device: BRCM2046 Hub, 0x0a5c (Broadcom Corp.), 0x4500, 0xfa110000 / 4
    USB Device: Bluetooth USB Host Controller, 0x05ac (Apple Inc.), 0x8215, 0xfa111000 / 7
    USB Device: Hub, 0x0424 (SMSC), 0x2514, 0xfd100000 / 2
    USB Device: Internal Memory Card Reader, 0x05ac (Apple Inc.), 0x8403, 0xfd110000 / 4
    USB Device: IR Receiver, 0x05ac (Apple Inc.), 0x8242, 0xfd120000 / 3
  4. Weaselboy Moderator


    Staff Member

    Jan 23, 2005
    I don't see any third party kexts running there that often cause these issues. My guess is still some sort of hardware problem. I would just take it back to Apple and let them have another go at it.

    I have read about users with Applecare getting Apple to just replace the machine after repeated, unsuccessful repair attempts. Maybe that us something you could explore with Apple?
  5. CLegros thread starter macrumors newbie

    May 12, 2014
    The last time I brought it in, they gave it back with nothing changed. They apparently ran tests dozens of times and could not find a problem.

    I think you're right… it's time to ask for a new computer.
  6. SaSaSushi macrumors 68040


    Aug 8, 2007
    Takamatsu, Japan
    Are you running off of stock Apple RAM or did you add some? In my experience, the vast majority of kernel panics come down to bad RAM.
  7. rambo47 macrumors 6502a


    Oct 3, 2010
    Denville, NJ
    This was happening with my daughter's iMac. She had the original factory RAM so I upgraded/maxed out her RAM with an upgrade kit from Crucial and all her problems went away. And the iMac runs like a new machine!
  8. SaSaSushi macrumors 68040


    Aug 8, 2007
    Takamatsu, Japan
    Oh, I wasn't saying that stock Apple RAM = no problems. I'm glad to hear you sorted out your daughter's iMac.

    Memtest86 is a great way to rule out bad memory where Apple's own diagnostics say there are no issues.

    I'm a big fan of Crucial/Micron as well. I am running 16GB of Crucial in addition to 16GB of stock Apple Elpida on my own iMac.

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