Kernel panic caused by wireless card, or the USB hub it is attached to?

Discussion in 'Mac Basics and Help' started by Jethryn Freyman, Feb 7, 2012.

  1. Jethryn Freyman macrumors 68020

    Jethryn Freyman

    Joined:
    Aug 9, 2007
    Location:
    Australia
    #1
    Running 10.5.8 here. I've got an Alfa AWUS036H USB wireless card plugged into the USB hub built into my Dell monitor.

    Every so often, it stops connecting to the network. Can't turn it on and off again, unplugging it causes a kernel panic, shutting down causes the computer to hang after logging out on a blank screen and then makes the fans run at full speed after a while (REALLY loud.)

    Anyway, I'm wondering if it's the actual card that's the problem, or if it's the fact that it's plugged into a USB port in the monitor USB hub.

    The code in bold is what made me wonder:

    Code:
    Interval Since Last Panic Report:  621351 sec
    Panics Since Last Report:          2
    Anonymous UUID:                    [edited]
    
    Tue Feb  7 18:54:17 2012
    panic(cpu 0 caller 0x000ACF54): enable_preemption: preemption_level -1
    
    Latest stack backtrace for cpu 0:
          Backtrace:
             0x0009CC88 0x0009D63C 0x00029DA0 0x000ACF54 0x00CA7780 0x00CAA048 0x00CAA1F0 0x00CA8B70 
             0x00CA4F6C 0x00CA5E34 0x00344D70 0x0035B9D0 0x0034B888 0x0034BB80 0x0034C390 0x0050E990 
             0x00C71ADC 0x00C71D64 0x00C6B1C8 0x00C6FC28 0x0051ADC8 0x00C6DB7C 0x00350114 0x003504D8 
             0x0003F2A0 0x000B1DD4 
          Kernel loadable modules in backtrace (with dependencies):
             com.realtek.driver.RTL8187(1.0)@0xca2000->0xd1ffff
                dependency: com.apple.iokit.IONetworkingFamily(1.6.1)@0xa3f000
               [B] dependency: com.apple.iokit.IOUSBFamily(3.5.2)@0x4fd000
             com.apple.driver.AppleUSBHub(3.4.9)@0xc69000->0xc78fff
                dependency: com.apple.iokit.IOUSBFamily(3.5.2)@0x4fd000
             com.apple.iokit.IOUSBFamily(3.5.2)@0x4fd000->0x533fff
    Proceeding back via exception chain:
    [/B]   Exception state (sv=0x550acc80)
          PC=0x00000000; MSR=0x0000D030; DAR=0x00000000; DSISR=0x00000000; LR=0x00000000; R1=0x00000000; XCP=0x00000000 (Unknown)
    
    BSD process name corresponding to current thread: kernel_task
     
  2. Macman45 macrumors G5

    Macman45

    Joined:
    Jul 29, 2011
    Location:
    Somewhere Back In The Long Ago
    #2
    USB is really not that great for this, and yes I think it's probably the card.
     

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