Here is Last Panic Report. Kindly see if you can point out something. To me com.apple.driver.AppleIntel5000Graphics should be causing issue. As this is iMac 5K with AMD R9 290x model.
Anonymous UUID: E15C84C5-6478-F289-9027-C5A3BA803CEF
Tue Apr 14 13:06:20 2015
*** Panic Report ***
panic(cpu 0 caller 0xffffff8013e17cc2): Kernel trap at 0x0000000000000000, type 14=page fault, registers:
CR0: 0x0000000080010033, CR2: 0x0000000000000000, CR3: 0x00000001c517f0bd, CR4: 0x00000000001627e0
RAX: 0xffffff802f3fb700, RBX: 0xffffff802b17d000, RCX: 0x0000000001250000, RDX: 0xffffff8029333c50
RSP: 0xffffff8120d63a58, RBP: 0xffffff8120d63a80, RSI: 0x0000000000080031, RDI: 0xffffff802f543b80
R8: 0x0000000000000026, R9: 0x0000000000000000, R10: 0xffffff802eaca5fc, R11: 0x0000000000000002
R12: 0xffffff802b17d000, R13: 0xffffff802f3abc00, R14: 0x0000000000000000, R15: 0xffffff802f543b80
RFL: 0x0000000000010246, RIP: 0x0000000000000000, CS: 0x0000000000000008, SS: 0x0000000000000010
Fault CR2: 0x0000000000000000, Error code: 0x0000000000000010, Fault CPU: 0x0
Backtrace (CPU 0), Frame : Return Address
0xffffff8120d63700 : 0xffffff8013d2bda1
0xffffff8120d63780 : 0xffffff8013e17cc2
0xffffff8120d63940 : 0xffffff8013e34b73
0xffffff8120d63960 : 0x0
0xffffff8120d63a80 : 0xffffff7f95d3efab
0xffffff8120d63ad0 : 0xffffff7f95d43619
0xffffff8120d63b20 : 0xffffff7f95d44350
0xffffff8120d63b60 : 0xffffff80143017cf
0xffffff8120d63bc0 : 0xffffff80142ff0c3
0xffffff8120d63d00 : 0xffffff8013de21e7
0xffffff8120d63e10 : 0xffffff8013d3000c
0xffffff8120d63e40 : 0xffffff8013d149f3
0xffffff8120d63e90 : 0xffffff8013d2531d
0xffffff8120d63f10 : 0xffffff8013e031ea
0xffffff8120d63fb0 : 0xffffff8013e35396
Kernel Extensions in backtrace:
com.apple.iokit.IOAcceleratorFamily2(156.14)[BE7D765B-49C1-34F9-B75E-3EAF8A4062 A3]@0xffffff7f95d27000->0xffffff7f95d95fff
dependency: com.apple.iokit.IOPCIFamily(2.9)[52E715FC-521D-3869-B2EA-5228FA4BEA34]@0xffffff 7f94524000
dependency: com.apple.iokit.IOGraphicsFamily(2.4.1)[82EAD591-67E3-39CB-A232-A8095CA30E92]@0 xffffff7f94e0c000
BSD process name corresponding to current thread: QuickLookUIHelpe
Mac OS version:
14D131
Kernel version:
Darwin Kernel Version 14.3.0: Mon Mar 23 11:59:05 PDT 2015; root:xnu-2782.20.48~5/RELEASE_X86_64
Kernel UUID: 4B3A11F4-77AA-3D27-A22D-81A1BC5B504D
Kernel slide: 0x0000000013a00000
Kernel text base: 0xffffff8013c00000
__HIB text base: 0xffffff8013b00000
System model name: iMac15,1 (Mac-42FD25EABCABB274)
System uptime in nanoseconds: 246926010584
last loaded kext at 12561448428: com.apple.driver.AppleBluetoothHIDKeyboard 176.2 (addr 0xffffff7f95f32000, size 16384)
last unloaded kext at 90907263293: com.apple.iokit.IOAHCIPassThrough 1.0.3 (addr 0xffffff7f9507c000, size 36864)
loaded kexts:
com.apple.driver.AppleBluetoothMultitouch 85.3
com.apple.driver.AudioAUUC 1.70
com.apple.driver.ApplePlatformEnabler 2.2.0d4
com.apple.driver.AGPM 110.19.5
com.apple.driver.X86PlatformShim 1.0.0
com.apple.filesystems.autofs 3.0
com.apple.iokit.IOBluetoothSerialManager 4.3.4f4
com.apple.driver.AppleOSXWatchdog 1
com.apple.driver.AppleMikeyHIDDriver 124
com.apple.driver.AppleHDA 272.18
com.apple.driver.AppleGraphicsDevicePolicy 3.7.7
com.apple.driver.AppleUpstreamUserClient 3.6.1
com.apple.iokit.IOUserEthernet 1.0.1
com.apple.Dont_Steal_Mac_OS_X 7.0.0
com.apple.driver.AppleHWAccess 1
com.apple.driver.AppleMikeyDriver 272.18
com.apple.driver.AppleLPC 1.7.3
com.apple.kext.AMDFramebuffer 1.3.2
com.apple.driver.AppleIntelHD5000Graphics 10.0.6
com.apple.driver.AppleHV 1
com.apple.driver.AppleIntelFramebufferAzul 10.0.6
com.apple.driver.AppleIntelSlowAdaptiveClocking 4.0.0
com.apple.iokit.BroadcomBluetoothHostControllerUSBTransport 4.3.4f4
com.apple.driver.AppleMCCSControl 1.2.11
com.apple.driver.AppleSMCLMU 2.0.7d0
com.apple.AMDRadeonX4000 1.3.2
com.apple.kext.AMD7000Controller 1.3.2
com.apple.driver.AppleThunderboltIP 2.0.2
com.apple.AppleFSCompression.AppleFSCompressionTypeDataless 1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1
com.apple.BootCache 36
com.apple.driver.AppleUSBHub 705.4.2
com.apple.driver.XsanFilter 404
com.apple.iokit.IOAHCIBlockStorage 2.7.1
com.apple.driver.AppleSDXC 1.6.5
com.apple.iokit.AppleBCM5701Ethernet 10.1.3
com.apple.driver.AirPort.Brcm4360 930.37.3
com.apple.driver.AppleAHCIPort 3.1.2
com.apple.driver.AppleUSBXHCI 710.4.11
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.nke.applicationfirewall 161
com.apple.security.quarantine 3
com.apple.security.TMSafetyNet 8
com.apple.driver.AppleBluetoothHIDKeyboard 176.2
com.apple.driver.AppleHIDKeyboard 176.2
com.apple.driver.IOBluetoothHIDDriver 4.3.4f4
com.apple.driver.AppleMultitouchDriver 263.9.1
com.apple.kext.triggers 1.0
com.apple.iokit.IOSerialFamily 11
com.apple.driver.DspFuncLib 272.18
com.apple.kext.OSvKernDSPLib 1.15
com.apple.iokit.IOSurface 97.4
com.apple.driver.AppleGraphicsControl 3.10.22
com.apple.driver.AppleHDAController 272.18
com.apple.iokit.IOHDAFamily 272.18
com.apple.iokit.IOAudioFamily 203.3
com.apple.vecLib.kext 1.2.0
com.apple.driver.AppleSMBusPCI 1.0.12d1
com.apple.driver.X86PlatformPlugin 1.0.0
com.apple.driver.IOPlatformPluginFamily 5.9.1d7
com.apple.iokit.IOSlowAdaptiveClockingFamily 1.0.0
com.apple.iokit.IOBluetoothHostControllerUSBTransport 4.3.4f4
com.apple.iokit.IOBluetoothFamily 4.3.4f4
com.apple.driver.AppleSMBusController 1.0.13d1
com.apple.iokit.IOUSBUserClient 705.4.0
com.apple.driver.AppleSMC 3.1.9
com.apple.iokit.IONDRVSupport 2.4.1
com.apple.iokit.IOAcceleratorFamily2 156.14
com.apple.kext.AMDSupport 1.3.2
com.apple.AppleGraphicsDeviceControl 3.10.22
com.apple.iokit.IOGraphicsFamily 2.4.1
com.apple.driver.AppleThunderboltEDMSink 4.0.2
com.apple.iokit.IOSCSIArchitectureModelFamily 3.7.5
com.apple.driver.AppleUSBMergeNub 705.4.0
com.apple.driver.AppleUSBComposite 705.4.9
com.apple.driver.CoreStorage 471.20.7
com.apple.driver.AppleThunderboltDPInAdapter 4.0.6
com.apple.driver.AppleThunderboltDPOutAdapter 4.0.6
com.apple.driver.AppleThunderboltDPAdapterFamily 4.0.6
com.apple.driver.AppleThunderboltPCIDownAdapter 2.0.2
com.apple.driver.AppleThunderboltNHI 3.1.7
com.apple.iokit.IOThunderboltFamily 4.2.2
com.apple.iokit.IOEthernetAVBController 1.0.3b3
com.apple.iokit.IO80211Family 730.60
com.apple.driver.mDNSOffloadUserClient 1.0.1b8
com.apple.iokit.IONetworkingFamily 3.2
com.apple.iokit.IOAHCIFamily 2.7.5
com.apple.iokit.IOUSBFamily 720.4.4
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