Well, just as I was starting to feel lucky I got another KP - same circumstances. I was going to attach a text copy of the log file but see now I can't. So here it is....
**********************************************************
Sat Jan 3 13:41:58 2015
*** Panic Report ***
panic(cpu 2 caller 0xffffff7f8a7acf63): "GPU Panic: [<None>] 3 3 7f 0 0 0 0 3 : NVRM[0/1:0:0]: Read Error 0x00000100: CFG 0xffffffff 0xffffffff 0xffffffff, BAR0 0xd2000000 0xffffff81234b8000 0x0a5480a2, D0, P2/4\n"@/SourceCache/AppleGraphicsControl/AppleGraphicsControl-3.7.21/src/Apple MuxControl/kext/GPUPanic.cpp:127
Backtrace (CPU 2), Frame : Return Address
0xffffff81111130f0 : 0xffffff8007b3a811
0xffffff8111113170 : 0xffffff7f8a7acf63
0xffffff8111113250 : 0xffffff7f887c3b9f
0xffffff8111113310 : 0xffffff7f8888d18e
0xffffff8111113350 : 0xffffff7f8888d1fe
0xffffff81111133c0 : 0xffffff7f88b0c056
0xffffff81111134f0 : 0xffffff7f888b082d
0xffffff8111113510 : 0xffffff7f887ca5f1
0xffffff81111135c0 : 0xffffff7f887c80fc
0xffffff81111137c0 : 0xffffff7f887c907a
0xffffff81111138a0 : 0xffffff7f89daa446
0xffffff81111138e0 : 0xffffff7f89db9dff
0xffffff8111113900 : 0xffffff7f89de8493
0xffffff8111113930 : 0xffffff7f89de84ed
0xffffff8111113970 : 0xffffff7f89dbfa1f
0xffffff81111139c0 : 0xffffff7f89d8a027
0xffffff8111113a60 : 0xffffff7f89d85da1
0xffffff8111113a90 : 0xffffff7f89d83873
0xffffff8111113ad0 : 0xffffff800810064c
0xffffff8111113b60 : 0xffffff8008102773
0xffffff8111113bc0 : 0xffffff8008100003
0xffffff8111113d00 : 0xffffff8007bea517
0xffffff8111113e10 : 0xffffff8007b3e91c
0xffffff8111113e40 : 0xffffff8007b235a3
0xffffff8111113e90 : 0xffffff8007b33e8d
0xffffff8111113f10 : 0xffffff8007c0a142
0xffffff8111113fb0 : 0xffffff8007c3ac66
Kernel Extensions in backtrace:
com.apple.driver.AppleMuxControl(3.7.21)[32B7E2DE-1F9D-3555-B687-7A76A62B81D2]@ 0xffffff7f8a79e000->0xffffff7f8a7b1fff
dependency: com.apple.driver.AppleGraphicsControl(3.7.21)[62689710-EEA7-307A-AC83-B8F25DA88 A6A]@0xffffff7f8a796000
dependency: com.apple.iokit.IOACPIFamily(1.4)[70E2B65E-A91A-3522-A1A0-79FD63EABB4C]@0xfffff f7f885a9000
dependency: com.apple.iokit.IOPCIFamily(2.9)[766FC23F-452C-3B74-951C-598BB17BCF06]@0xffffff 7f88324000
dependency: com.apple.iokit.IOGraphicsFamily(2.4.1)[6D99A3BE-D531-3780-880B-13F2FC894A4A]@0 xffffff7f8871c000
dependency: com.apple.driver.AppleBacklightExpert(1.1.0)[0183904C-6A16-32C4-9405-EEFD7F820B 02]@0xffffff7f8a799000
com.apple.nvidia.classic.NVDAResmanTesla(10.0)[796AE430-39FB-3255-8161-D52AFA28 EE2B]@0xffffff7f88773000->0xffffff7f889dcfff
dependency: com.apple.iokit.IOPCIFamily(2.9)[766FC23F-452C-3B74-951C-598BB17BCF06]@0xffffff 7f88324000
dependency: com.apple.iokit.IONDRVSupport(2.4.1)[F4738C55-B507-3627-A9CA-3D29A5230A03]@0xff ffff7f88763000
dependency: com.apple.iokit.IOGraphicsFamily(2.4.1)[6D99A3BE-D531-3780-880B-13F2FC894A4A]@0 xffffff7f8871c000
com.apple.nvidia.classic.NVDANV50HalTesla(10.0)[7FE40648-F15F-3E18-91E2-FDDDF4C DA355]@0xffffff7f889e7000->0xffffff7f88c90fff
dependency: com.apple.nvidia.classic.NVDAResmanTesla(10.0.0)[796AE430-39FB-3255-8161-D52AFA 28EE2B]@0xffffff7f88773000
dependency: com.apple.iokit.IOPCIFamily(2.9)[766FC23F-452C-3B74-951C-598BB17BCF06]@0xffffff 7f88324000
com.apple.GeForceTesla(10.0)[67CD214F-0F26-3BEF-BAD0-CF0F83C2616D]@0xffffff7f89 d67000->0xffffff7f89e34fff
dependency: com.apple.iokit.IOPCIFamily(2.9)[766FC23F-452C-3B74-951C-598BB17BCF06]@0xffffff 7f88324000
dependency: com.apple.iokit.IONDRVSupport(2.4.1)[F4738C55-B507-3627-A9CA-3D29A5230A03]@0xff ffff7f88763000
dependency: com.apple.iokit.IOGraphicsFamily(2.4.1)[6D99A3BE-D531-3780-880B-13F2FC894A4A]@0 xffffff7f8871c000
dependency: com.apple.nvidia.classic.NVDAResmanTesla(10.0.0)[796AE430-39FB-3255-8161-D52AFA 28EE2B]@0xffffff7f88773000
BSD process name corresponding to current thread: WindowServer
Mac OS version:
14B25
Kernel version:
Darwin Kernel Version 14.0.0: Fri Sep 19 00:26:44 PDT 2014; root:xnu-2782.1.97~2/RELEASE_X86_64
Kernel UUID: 89E10306-BC78-3A3B-955C-7C4922577E61
Kernel slide: 0x0000000007800000
Kernel text base: 0xffffff8007a00000
__HIB text base: 0xffffff8007900000
System model name: MacBookPro6,2 (Mac-F22586C8)
System uptime in nanoseconds: 27620406862585
last loaded kext at 3104420936797: com.apple.filesystems.smbfs 3.0.0 (addr 0xffffff7f8a909000, size 389120)
last unloaded kext at 3081175371191: com.apple.driver.AppleUSBCDC 4.2.2b5 (addr 0xffffff7f8a8a0000, size 16384)
loaded kexts:
com.parallels.kext.vnic 10.0.2 27712
com.parallels.kext.netbridge 10.0.2 27712
com.parallels.kext.hypervisor 10.0.2 27712
com.parallels.kext.usbconnect 10.0.2 27712
com.apple.filesystems.smbfs 3.0.0
com.apple.driver.AudioAUUC 1.70
com.apple.driver.AppleHWSensor 1.9.5d0
com.apple.driver.AGPM 100.14.37
com.apple.filesystems.autofs 3.0
com.apple.iokit.IOBluetoothSerialManager 4.3.1f2
com.apple.driver.AppleOSXWatchdog 1
com.apple.driver.AppleMikeyHIDDriver 124
com.apple.driver.AppleMikeyDriver 267.0
com.apple.driver.AppleHDA 267.0
com.apple.driver.AppleIntelHDGraphics 10.0.0
com.apple.driver.AppleUpstreamUserClient 3.6.1
com.apple.GeForceTesla 10.0.0
com.apple.driver.AppleIntelHDGraphicsFB 10.0.0
com.apple.driver.AppleSMCPDRC 1.0.0
com.apple.driver.ACPI_SMC_PlatformPlugin 1.0.0
com.apple.driver.AppleLPC 1.7.3
com.apple.driver.AppleSMCLMU 2.0.4d1
com.apple.iokit.BroadcomBluetoothHostControllerUSBTransport 4.3.1f2
com.apple.driver.AppleMuxControl 3.7.21
com.apple.driver.AppleMCCSControl 1.2.10
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.AppleHV 1
com.apple.driver.SMCMotionSensor 3.0.4d1
com.apple.driver.AppleUSBTCButtons 240.2
com.apple.driver.AppleUSBCardReader 3.5.0
com.apple.driver.AppleUSBTCKeyboard 240.2
com.apple.driver.AppleIRController 327.5
com.apple.AppleFSCompression.AppleFSCompressionTypeDataless 1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1
com.apple.BootCache 35
com.apple.iokit.SCSITaskUserClient 3.7.0
com.apple.driver.XsanFilter 404
com.apple.iokit.IOAHCIBlockStorage 2.6.5
com.apple.driver.AppleUSBHub 705.4.1
com.apple.driver.AppleFWOHCI 5.5.2
com.apple.driver.AirPort.Brcm4331 800.20.24
com.apple.iokit.AppleBCM5701Ethernet 10.1.2b3
com.apple.driver.AppleAHCIPort 3.0.7
com.apple.driver.AppleUSBEHCI 705.4.14
com.apple.driver.AppleSmartBatteryManager 161.0.0
com.apple.driver.AppleACPIButtons 3.1
com.apple.driver.AppleRTC 2.0
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.driver.IOBluetoothHIDDriver 4.3.1f2
com.apple.AppleGraphicsDeviceControl 3.7.21
com.apple.kext.triggers 1.0
com.apple.iokit.IOSerialFamily 11
com.apple.driver.DspFuncLib 267.0
com.apple.kext.OSvKernDSPLib 1.15
com.apple.iokit.IOAudioFamily 200.6
com.apple.vecLib.kext 1.2.0
com.apple.nvidia.classic.NVDANV50HalTesla 10.0.0
com.apple.nvidia.classic.NVDAResmanTesla 10.0.0
com.apple.iokit.IOFireWireIP 2.2.6
com.apple.driver.AppleSMBusPCI 1.0.12d1
com.apple.driver.IOPlatformPluginLegacy 1.0.0
com.apple.driver.IOPlatformPluginFamily 5.8.0d49
com.apple.iokit.IOBluetoothHostControllerUSBTransport 4.3.1f2
com.apple.driver.AppleHDAController 267.0
com.apple.iokit.IOHDAFamily 267.0
com.apple.iokit.IOUSBUserClient 705.4.0
com.apple.driver.AppleGraphicsControl 3.7.21
com.apple.driver.AppleBacklightExpert 1.1.0
com.apple.driver.AppleSMBusController 1.0.13d1
com.apple.iokit.IOSurface 97
com.apple.iokit.IOBluetoothFamily 4.3.1f2
com.apple.iokit.IONDRVSupport 2.4.1
com.apple.iokit.IOGraphicsFamily 2.4.1
com.apple.driver.AppleSMC 3.1.9
com.apple.iokit.IOSCSIBlockCommandsDevice 3.7.0
com.apple.iokit.IOUSBMassStorageClass 3.7.0
com.apple.driver.AppleUSBMultitouch 245.2
com.apple.iokit.IOUSBHIDDriver 705.4.0
com.apple.driver.CoreStorage 471
com.apple.driver.AppleUSBMergeNub 705.4.0
com.apple.driver.AppleUSBComposite 705.4.9
com.apple.iokit.IOSCSIMultimediaCommandsDevice 3.7.0
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 3.7.0
com.apple.iokit.IOFireWireFamily 4.5.6
com.apple.iokit.IO80211Family 700.52
com.apple.iokit.IOEthernetAVBController 1.0.3b3
com.apple.driver.mDNSOffloadUserClient 1.0.1b8
com.apple.iokit.IONetworkingFamily 3.2
com.apple.iokit.IOAHCIFamily 2.7.0
com.apple.iokit.IOUSBFamily 705.4.14
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 389.1
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.Libm 1
com.apple.kec.pthread 1
com.apple.kec.corecrypto 1.0