need help with lion kernel panic

Hey all,

I have a 2006 20" 2.16GHz iMac with 4GB RAM and a 250GB hard drive running 10.7.5 OS X Lion. The iMac recently experienced a kernel panic, and I'm not sure why. I haven't been running any new programs or changing my usage patterns recently. This is the first on that has happened in quite awhile.

I'm attaching the kernel panic log to this post in the hope that someone with more knowledge than myself may be able to diagnose the issue and prevent another panic from happening again.

Thu Apr 28 21:36:58 2016

panic(cpu 0 caller 0x2ceabf): Kernel trap at 0x01841ef2, type 14=page fault, registers:

CR0: 0x80010033, CR2: 0x5989b03c, CR3: 0x00100000, CR4: 0x00000660

EAX: 0x5989b03c, EBX: 0x0188c354, ECX: 0x00020000, EDX: 0xffffffff

CR2: 0x5989b03c, EBP: 0x00e13b58, ESI: 0x08f9d800, EDI: 0x08f9dd24

EFL: 0x00010206, EIP: 0x01841ef2, CS: 0x00000008, DS: 0x00000010

Error code: 0x00000000

Backtrace (CPU 0), Frame : Return Address (4 potential args on stack)

0xe139a8 : 0x2203de (0x6b08cc 0xe139c8 0x229fb0 0x0)

0xe139d8 : 0x2ceabf (0x6bd9e0 0x1841ef2 0xe 0x6bd989)

0xe13a88 : 0x2e5564 (0xe13ab0 0xe13a98 0xe13aa8 0x6419e5)

0xe13aa8 : 0x1841ef2 (0xe 0x48 0xe10010 0x10)

0xe13b58 : 0x1845a8f (0x8f9d800 0xe13bc8 0xe13b88 0x5f94000)

0xe13be8 : 0x184258f (0x8f9d800 0x0 0xe13c28 0xe13c24)

0xe13c38 : 0x67fcf5 (0x8f9d800 0x0 0xbd2c5c8 0xe13cc4)

0xe13c78 : 0x6807a7 (0x188c330 0x8f9d800 0x6418088 0x1)

0xe13cd8 : 0x68106f (0x8f9d800 0x10 0xe13d08 0x0)

0xe13dd8 : 0x2accc0 (0x8f9d800 0x10 0x6418088 0x1)

0xe13ed8 : 0x222db6 (0x6418060 0xbd2c5a0 0xe13f0c 0x2c3f24)

0xe13f08 : 0x214063 (0x6418000 0x8a99960 0x8bcb230 0x6418000)

0xe13f48 : 0x21b25b (0x6418000 0x0 0x0 0x0)

0xe13f98 : 0x2b7bb7 (0x60094d4 0x1 0x6009504 0x8)

0xe13fc8 : 0x2e60c7 (0x60094d0 0x0 0x10 0x60094d0)

Kernel Extensions in backtrace:

com.apple.ATIRadeonX1000(7.0.4)[D115E4D9-D90D-4251-BF41-8ED504BEF611]@0x1839000 ->0x18a5fff

dependency: com.apple.iokit.IOPCIFamily(2.7)[8087C029-833E-4B62-A8C3-2B074B4C55F7]@0xade000

dependency: com.apple.iokit.IONDRVSupport(2.3.4)[393829BA-614C-4ED7-B4AD-CE577A41C683]@0xf4 5000

dependency: com.apple.iokit.IOGraphicsFamily(2.3.4)[EE3F8FBE-3457-4F0E-A3A3-B9B1A44DCF6B]@0 xf11000

BSD process name corresponding to current thread: plugin-container

Mac OS version:

11G63

Kernel version:

Darwin Kernel Version 11.4.2: Thu Aug 23 16:26:45 PDT 2012; root:xnu-1699.32.7~1/RELEASE_I386

Kernel UUID: 859B45FB-14BB-35ED-B823-08393C63E13B

System model name: iMac5,1 (Mac-F4228EC8)

System uptime in nanoseconds: 3137275654772424

last loaded kext at 2927429570719202: com.apple.filesystems.msdosfs 1.7.1 (addr 0x148d000, size 61440)

last unloaded kext at 2927670692311866: com.apple.iokit.IOUSBMassStorageClass 3.0.3 (addr 0x1922000, size 65536)

loaded kexts:

com.apple.filesystems.udf 2.2.1

com.apple.filesystems.smbfs 1.7.2

com.apple.filesystems.autofs 3.0

com.apple.driver.AppleHWSensor 1.9.5d0

com.apple.driver.AppleHDA 2.2.5a5

com.apple.driver.AudioAUUC 1.59

com.apple.driver.AppleUpstreamUserClient 3.5.9

com.apple.driver.AppleBacklight 170.2.2

com.apple.iokit.IOUserEthernet 1.0.0d1

com.apple.iokit.IOBluetoothSerialManager 4.0.8f17

com.apple.Dont_Steal_Mac_OS_X 7.0.0

com.apple.driver.AudioIPCDriver 1.2.3

com.apple.driver.ApplePolicyControl 3.1.33

com.apple.driver.ACPI_SMC_PlatformPlugin 5.0.0d8

com.apple.kext.ATIFramebuffer 7.3.2

com.apple.driver.AppleLPC 1.6.0

com.apple.driver.AppleMCCSControl 1.0.33

com.apple.ATIRadeonX1000 7.0.4

com.apple.driver.CSRUSBBluetoothHCIController 4.0.8f17

com.apple.driver.AppleIRController 312

com.apple.iokit.SCSITaskUserClient 3.2.1

com.apple.driver.XsanFilter 404

com.apple.AppleFSCompression.AppleFSCompressionTypeDataless 1.0.0d1

com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1

com.apple.BootCache 33

com.apple.driver.AppleFWOHCI 4.9.0

com.apple.iokit.IOAHCIBlockStorage 2.1.0

com.apple.driver.AppleUSBHub 5.1.0

com.apple.driver.AirPortBrcm43224 501.36.15

com.apple.iokit.AppleYukon2 3.2.2b1

com.apple.driver.AppleAHCIPort 2.3.1

com.apple.driver.AppleIntelPIIXATA 2.5.1

com.apple.driver.AppleUSBEHCI 5.1.0

com.apple.driver.AppleUSBUHCI 5.1.0

com.apple.driver.AppleEFINVRAM 1.6.1

com.apple.driver.AppleRTC 1.5

com.apple.driver.AppleHPET 1.7

com.apple.driver.AppleACPIButtons 1.5

com.apple.driver.AppleSMBIOS 1.9

com.apple.driver.AppleACPIEC 1.5

com.apple.driver.AppleAPIC 1.6

com.apple.driver.AppleIntelCPUPowerManagementClient 195.0.0

com.apple.nke.applicationfirewall 3.2.30

com.apple.security.quarantine 1.4

com.apple.security.TMSafetyNet 8

com.apple.driver.AppleIntelCPUPowerManagement 195.0.0

com.apple.kext.triggers 1.0

com.apple.driver.DspFuncLib 2.2.5a5

com.apple.driver.AppleHDAController 2.2.5a5

com.apple.iokit.IOHDAFamily 2.2.5a5

com.apple.driver.AppleBacklightExpert 1.0.4

com.apple.iokit.IOSurface 80.0.2

com.apple.iokit.IOSerialFamily 10.0.5

com.apple.iokit.IOAudioFamily 1.8.6fc18

com.apple.kext.OSvKernDSPLib 1.3

com.apple.driver.AppleGraphicsControl 3.1.33

com.apple.iokit.IOFireWireIP 2.2.5

com.apple.driver.AppleSMC 3.1.3d10

com.apple.driver.IOPlatformPluginLegacy 5.0.0d8

com.apple.driver.IOPlatformPluginFamily 5.1.1d6

com.apple.driver.AppleSMBusController 1.0.10d0

com.apple.iokit.IONDRVSupport 2.3.4

com.apple.kext.ATI1600Controller 7.3.2

com.apple.kext.ATISupport 7.3.2

com.apple.iokit.IOGraphicsFamily 2.3.4

com.apple.driver.AppleUSBMergeNub 5.1.0

com.apple.driver.AppleUSBBluetoothHCIController 4.0.8f17

com.apple.iokit.IOBluetoothFamily 4.0.8f17

com.apple.iokit.IOUSBHIDDriver 5.0.0

com.apple.driver.AppleUSBComposite 5.0.0

com.apple.iokit.IOSCSIMultimediaCommandsDevice 3.2.1

com.apple.iokit.IOBDStorageFamily 1.7

com.apple.iokit.IODVDStorageFamily 1.7.1

com.apple.iokit.IOCDStorageFamily 1.7.1

com.apple.iokit.IOATAPIProtocolTransport 3.0.0

com.apple.iokit.IOSCSIArchitectureModelFamily 3.2.1

com.apple.iokit.IOFireWireFamily 4.4.8

com.apple.iokit.IOUSBUserClient 5.0.0

com.apple.iokit.IO80211Family 420.3

com.apple.iokit.IONetworkingFamily 2.1

com.apple.iokit.IOAHCIFamily 2.0.8

com.apple.iokit.IOATAFamily 2.5.1

com.apple.iokit.IOUSBFamily 5.1.0

com.apple.driver.AppleEFIRuntime 1.6.1

com.apple.iokit.IOHIDFamily 1.7.1

com.apple.iokit.IOSMBusFamily 1.1

com.apple.security.sandbox 177.11

com.apple.kext.AppleMatch 1.0.0d1

com.apple.driver.DiskImages 331.7

com.apple.iokit.IOStorageFamily 1.7.2

com.apple.driver.AppleKeyStore 28.18

com.apple.driver.AppleACPIPlatform 1.5

com.apple.iokit.IOPCIFamily 2.7

com.apple.iokit.IOACPIFamily 1.4