Q: kernel panic - GPU RADEON D4850

Off course :

Anonymous UUID:       E49E6991-48CC-C0F5-38A0-84658D450F7E

Sun Feb  8 13:53:36 2015

*** Panic Report ***

panic(cpu 1 caller 0xffffff801e41a46e): Kernel trap at 0xffffff7f9fbe2a1f, type 14=page fault, registers:

CR0: 0x000000008001003b, CR2: 0x0000000000000010, CR3: 0x00000000204ab000, CR4: 0x0000000000002660

RAX: 0x0000000000000000, RBX: 0xffffff8036d49800, RCX: 0x4263b94fa1620013, RDX: 0xffffff815ff93a69

RSP: 0xffffff815ff93af0, RBP: 0xffffff815ff93bf0, RSI: 0xffffff815ff939c0, RDI: 0x0000000000000000

R8:  0xffffff7f9fc13d20, R9:  0x0000000000000000, R10: 0xffffff801e954750, R11: 0x0000000000000000

R12: 0x0000000000000001, R13: 0xffffff801eb10f08, R14: 0xffffff8032cbf600, R15: 0x00000000e0000201

RFL: 0x0000000000010202, RIP: 0xffffff7f9fbe2a1f, CS:  0x0000000000000008, SS:  0x0000000000000000

Fault CR2: 0x0000000000000010, Error code: 0x0000000000000000, Fault CPU: 0x1

Backtrace (CPU 1), Frame : Return Address

0xffffff815ff937a0 : 0xffffff801e32fe41

0xffffff815ff93820 : 0xffffff801e41a46e

0xffffff815ff939e0 : 0xffffff801e436683

0xffffff815ff93a00 : 0xffffff7f9fbe2a1f

0xffffff815ff93bf0 : 0xffffff7f9fbec705

0xffffff815ff93c20 : 0xffffff7fa010d407

0xffffff815ff93dc0 : 0xffffff7fa0109c4c

0xffffff815ff93df0 : 0xffffff801e8d660e

0xffffff815ff93e50 : 0xffffff801e8c3bb3

0xffffff815ff93ee0 : 0xffffff801e8bc5e7

0xffffff815ff93f00 : 0xffffff801e3624f9

0xffffff815ff93fb0 : 0xffffff801e414dd7

      Kernel Extensions in backtrace:

         com.apple.iokit.IOBluetoothFamily(4.3.2f6)[D266F614-275C-3C16-8F71-386A74F06046 ]@0xffffff7f9fbbd000->0xffffff7f9fc67fff

            dependency: com.apple.iokit.IOReportFamily(31)[781C9DD1-4CE9-3AEB-85EA-D420CEC18916]@0xffff ff7f9f2b9000

         com.apple.iokit.IOBluetoothHostControllerUSBTransport(4.3.1f2)[54770EF6-0F9F-38 F2-900C-4A7693B91130]@0xffffff7fa0108000->0xffffff7fa0129fff

            dependency: com.apple.iokit.IOBluetoothFamily(4.3.2f6)[D266F614-275C-3C16-8F71-386A74F06046 ]@0xffffff7f9fbbd000

            dependency: com.apple.iokit.IOUSBFamily(710.4.14)[4030C18E-76A0-37E6-9612-2C901F789E41]@0xf fffff7f9eece000

            dependency: com.apple.iokit.IOACPIFamily(1.4)[70E2B65E-A91A-3522-A1A0-79FD63EABB4C]@0xfffff f7f9f2c0000

            dependency: com.apple.iokit.IOPCIFamily(2.9)[56AD16B5-4F29-3F74-93E7-D492B3966DE2]@0xffffff 7f9eb24000

BSD process name corresponding to current thread: kernel_task

Mac OS version:

14C109

Kernel version:

Darwin Kernel Version 14.1.0: Mon Dec 22 23:10:38 PST 2014; root:xnu-2782.10.72~2/RELEASE_X86_64

Kernel UUID: DCF5C2D5-16AE-37F5-B2BE-ED127048DFF5

Kernel slide:     0x000000001e000000

Kernel text base: 0xffffff801e200000

__HIB  text base: 0xffffff801e100000

System model name: iMac11,1 (Mac-F2268DAE)

System uptime in nanoseconds: 50700401245

last loaded kext at 50199431581: com.apple.driver.AppleHWSensor 1.9.5d0 (addr 0xffffff7fa05cd000, size 28672)

loaded kexts:

com.apple.driver.AppleHWSensor 1.9.5d0

com.apple.iokit.IOUserEthernet 1.0.1

com.apple.iokit.IOBluetoothSerialManager 4.3.1f2

com.apple.driver.AppleUpstreamUserClient 3.6.1

com.apple.driver.AppleTyMCEDriver 1.0.2d2

com.apple.driver.AGPM 100.14.37

com.apple.driver.AppleMikeyHIDDriver 124

com.apple.driver.AppleHDAHardwareConfigDriver 267.0

com.apple.Dont_Steal_Mac_OS_X 7.0.0

com.apple.kext.AMDFramebuffer 1.2.8

com.apple.driver.AppleMuxControl 3.7.21

com.apple.driver.AppleOSXWatchdog 1

com.apple.driver.AppleMikeyDriver 267.0

com.apple.iokit.IOBluetoothUSBDFU 4.3.1f2

com.apple.driver.AppleHDA 267.0

com.apple.driver.AppleHWAccess 1

com.apple.ATIRadeonX2000 10.0.0

com.apple.driver.AppleBacklight 170.4.12

com.apple.iokit.BroadcomBluetoothHostControllerUSBTransport 4.3.1f2

com.apple.driver.AppleHV 1

com.apple.driver.AppleLPC 1.7.3

com.apple.kext.AMD4800Controller 1.2.8

com.apple.driver.ACPI_SMC_PlatformPlugin 1.0.0

com.apple.driver.AppleMCCSControl 1.2.10

com.apple.filesystems.autofs 3.0

com.apple.driver.AppleUSBCardReader 3.5.1

com.apple.driver.AppleIRController 327.5

com.apple.driver.AppleFileSystemDriver 3.0.1

com.apple.AppleFSCompression.AppleFSCompressionTypeDataless 1.0.0d1

com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1

com.apple.BootCache 35

com.apple.iokit.SCSITaskUserClient 3.7.3

com.apple.driver.XsanFilter 404

com.apple.iokit.IOAHCIBlockStorage 2.7.0

com.apple.driver.AppleUSBHub 705.4.2

com.apple.driver.AppleFWOHCI 5.5.2

com.apple.driver.AirPort.Atheros40 700.74.5

com.apple.iokit.AppleBCM5701Ethernet 10.1.3

com.apple.driver.AppleAHCIPort 3.1.0

com.apple.driver.AppleUSBEHCI 705.4.14

com.apple.driver.AppleUSBUHCI 656.4.1

com.apple.driver.AppleRTC 2.0

com.apple.driver.AppleACPIButtons 3.1

com.apple.driver.AppleHPET 1.8

com.apple.driver.AppleSMBIOS 2.1

com.apple.driver.AppleACPIEC 3.1

com.apple.driver.AppleAPIC 1.7

com.apple.driver.AppleIntelCPUPowerManagementClient 218.0.0

com.apple.nke.applicationfirewall 161

com.apple.security.quarantine 3

com.apple.security.TMSafetyNet 8

com.apple.driver.AppleIntelCPUPowerManagement 218.0.0

com.apple.iokit.IOSurface 97

com.apple.iokit.IOSerialFamily 11

com.apple.driver.AppleGraphicsControl 3.7.21

com.apple.driver.DspFuncLib 267.0

com.apple.kext.OSvKernDSPLib 1.15

com.apple.iokit.IOAudioFamily 203.3

com.apple.vecLib.kext 1.2.0

com.apple.driver.AppleBacklightExpert 1.1.0

com.apple.iokit.IONDRVSupport 2.4.1

com.apple.driver.AppleSMBusPCI 1.0.12d1

com.apple.iokit.IOBluetoothHostControllerUSBTransport 4.3.1f2

com.apple.iokit.IOBluetoothFamily 4.3.2f6

com.apple.iokit.IOFireWireIP 2.2.6

com.apple.driver.AppleHDAController 267.0

com.apple.iokit.IOHDAFamily 267.0

com.apple.kext.AMDSupport 1.2.8

com.apple.AppleGraphicsDeviceControl 3.7.21

com.apple.driver.AppleSMC 3.1.9

com.apple.driver.IOPlatformPluginLegacy 1.0.0

com.apple.driver.IOPlatformPluginFamily 5.8.0d49

com.apple.driver.AppleSMBusController 1.0.13d1

com.apple.iokit.IOGraphicsFamily 2.4.1

com.apple.kext.triggers 1.0

com.apple.iokit.IOUSBUserClient 705.4.0

com.apple.iokit.IOSCSIBlockCommandsDevice 3.7.3

com.apple.iokit.IOUSBMassStorageClass 3.7.1

com.apple.iokit.IOUSBHIDDriver 705.4.0

com.apple.driver.AppleUSBMergeNub 705.4.0

com.apple.driver.AppleUSBComposite 705.4.9

com.apple.iokit.IOSCSIMultimediaCommandsDevice 3.7.3

com.apple.iokit.IOBDStorageFamily 1.7

com.apple.iokit.IODVDStorageFamily 1.7.1

com.apple.iokit.IOCDStorageFamily 1.7.1

com.apple.iokit.IOAHCISerialATAPI 2.6.1

com.apple.iokit.IOSCSIArchitectureModelFamily 3.7.3

com.apple.iokit.IOFireWireFamily 4.5.6

com.apple.iokit.IO80211Family 710.55

com.apple.iokit.IOEthernetAVBController 1.0.3b3

com.apple.driver.mDNSOffloadUserClient 1.0.1b8

com.apple.iokit.IONetworkingFamily 3.2

com.apple.iokit.IOAHCIFamily 2.7.5

com.apple.iokit.IOUSBFamily 710.4.14

com.apple.driver.AppleEFINVRAM 2.0

com.apple.driver.AppleEFIRuntime 2.0

com.apple.iokit.IOHIDFamily 2.0.0

com.apple.iokit.IOSMBusFamily 1.1

com.apple.security.sandbox 300.0

com.apple.kext.AppleMatch 1.0.0d1

com.apple.driver.AppleKeyStore 2

com.apple.driver.AppleMobileFileIntegrity 1.0.5

com.apple.driver.AppleCredentialManager 1.0

com.apple.driver.DiskImages 396

com.apple.iokit.IOStorageFamily 2.0

com.apple.iokit.IOReportFamily 31

com.apple.driver.AppleFDEKeyStore 28.30

com.apple.driver.AppleACPIPlatform 3.1

com.apple.iokit.IOPCIFamily 2.9

com.apple.iokit.IOACPIFamily 1.4

com.apple.kec.corecrypto 1.0

com.apple.kec.Libm 1

com.apple.kec.pthread 1

Because it has been quite a while that my iMac have these issues, and by removing the GPU drivers I made my Mac work fine on its CPU. Even if I was quite sure of the issue I told myself that maybe it was a driver problem and it would have been fixed in an update (because my GPU crashed just after Yosemite update).

I already tried the hardware test but in any cases it crashes every time.

But anyway it doesn't worth a repair at the Genius Bar, I could fix it myself but I can't find a place to buy it. Any idea ?

Thanks for your quick answer

Already tried to reinstall osx more than 15 times. Always the same issue

I'll try to install the new OS and see if it works again

Ok I installed the new OS now in verbose it says that my airport (en1) can't get a complete sequence (16 normally here 8). Then it goes on the white screen for eternity as usual.