Q: Macbook restarts after going to sleep when not plugged into mains

Hi all,
I've a mid-2012 Macbook Pro running Yosemite (10.10.3), 2.5GHz i5 and have just recently upgraded it to 16GB RAM (and I'm wondering if that's the problem).

The post title says it all really - if I let the computer go to sleep when it's not plugged into the mains, when I wake it up by pressing a key it restarts. Battery life is not a factor in this - I can have lots of juice left but the same thing will happen.
Once rebooted, I get the 'Your computer restarted because of a problem' window with the following text; I'm hoping someone smarter than me might be able to spot something in this that will help resolve the problem.

Any thoughts appreciated. Many thanks in advance.

tim

Fri Apr 10 20:26:57 2015

*** Panic Report ***

panic(cpu 0 caller 0xffffff8002217cc2): Kernel trap at 0xffffff800232b4e8, type 14=page fault, registers:

CR0: 0x000000008001003b, CR2: 0x00000000092e0028, CR3: 0x000000000317c001, CR4: 0x00000000001626e0

RAX: 0x00000000002e0000, RBX: 0xffffff81e1a47da0, RCX: 0x00000000092e0000, RDX: 0xffffff801fb7f4e0

RSP: 0xffffff81ea5dbca8, RBP: 0xffffff81ea5dbd50, RSI: 0xffffff80028f38e0, RDI: 0xffffff81e1702500

R8:  0x0000000000000000, R9:  0x0000000000000001, R10: 0x000000000000000b, R11: 0x000000000000000b

R12: 0xffffff81e1702500, R13: 0xffffff8201a0f000, R14: 0x0000000000000001, R15: 0xffffff8020572dc0

RFL: 0x0000000000010206, RIP: 0xffffff800232b4e8, CS:  0x0000000000000008, SS:  0x0000000000000000

Fault CR2: 0x00000000092e0028, Error code: 0x0000000000000002, Fault CPU: 0x0

Backtrace (CPU 0), Frame : Return Address

0xffffff81ea5db950 : 0xffffff800212bda1

0xffffff81ea5db9d0 : 0xffffff8002217cc2

0xffffff81ea5dbb90 : 0xffffff8002234b73

0xffffff81ea5dbbb0 : 0xffffff800232b4e8

0xffffff81ea5dbd50 : 0xffffff8002377b34

0xffffff81ea5dbda0 : 0xffffff800255e5a1

0xffffff81ea5dbdd0 : 0xffffff800255559f

0xffffff81ea5dbeb0 : 0xffffff800235879b

0xffffff81ea5dbed0 : 0xffffff8002342e24

0xffffff81ea5dbf40 : 0xffffff800234d027

0xffffff81ea5dbf50 : 0xffffff800264ba86

0xffffff81ea5dbfb0 : 0xffffff8002235376

BSD process name corresponding to current thread: launchd

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 text base: 0xffffff8002000000

__HIB  text base: 0xffffff8001f00000

System model name: MacBookPro9,2 (Mac-6F01561E16C75D06)

System uptime in nanoseconds: 109860300807373

last loaded kext at 105799869432469: com.apple.filesystems.smbfs    3.0.1 (addr 0xffffff7f84a91000, size 389120)

last unloaded kext at 356418188620: com.apple.driver.AirPort.Brcm4331    800.20.24 (addr 0xffffff7f83da5000, size 2043904)

loaded kexts:

com.trusteer.driver.gakl_driver_2    1

com.Cycling74.driver.Soundflower    1.6.5

com.avg.Antivirus.OnAccess.kext    2015.0

at.obdev.nke.LittleSnitch    4216

com.apple.filesystems.smbfs    3.0.1

com.apple.filesystems.udf    2.5

com.apple.driver.AGPM    110.19.5

com.apple.driver.X86PlatformShim    1.0.0

com.apple.driver.AudioAUUC    1.70

com.apple.iokit.IOUserEthernet    1.0.1

com.apple.iokit.IOBluetoothSerialManager    4.3.4f4

com.apple.Dont_Steal_Mac_OS_X    7.0.0

com.apple.driver.AppleHWAccess    1

com.apple.driver.AppleHV    1

com.apple.driver.AppleIntelSlowAdaptiveClocking    4.0.0

com.apple.filesystems.autofs    3.0

com.apple.driver.AppleOSXWatchdog    1

com.apple.driver.AppleMikeyHIDDriver    124

com.apple.driver.AppleUpstreamUserClient    3.6.1

com.apple.driver.AppleHDA    272.18

com.apple.driver.AppleMikeyDriver    272.18

com.apple.iokit.BroadcomBluetoothHostControllerUSBTransport    4.3.4f4

com.apple.driver.AppleSMCPDRC    1.0.0

com.apple.driver.AppleBacklight    170.7.4

com.apple.driver.AppleMCCSControl    1.2.11

com.apple.driver.AppleSMCLMU    2.0.7d0

com.apple.driver.AppleThunderboltIP    2.0.2

com.apple.driver.AppleIntelHD4000Graphics    10.0.6

com.apple.driver.AppleIntelFramebufferCapri    10.0.6

com.apple.driver.AppleLPC    1.7.3

com.apple.driver.SMCMotionSensor    3.0.4d1

com.apple.driver.AppleUSBTCButtons    240.2

com.apple.driver.AppleIRController    327.5

com.apple.driver.AppleUSBTCKeyboard    240.2

com.apple.AppleFSCompression.AppleFSCompressionTypeDataless    1.0.0d1

com.apple.AppleFSCompression.AppleFSCompressionTypeZlib    1.0.0d1

com.apple.BootCache    36

com.apple.iokit.SCSITaskUserClient    3.7.5

com.apple.driver.XsanFilter    404

com.apple.iokit.IOAHCIBlockStorage    2.7.1

com.apple.driver.AppleUSBHub    705.4.2

com.apple.driver.AirPort.Brcm4360    930.37.3

com.apple.iokit.AppleBCM5701Ethernet    10.1.3

com.apple.driver.AppleFWOHCI    5.5.2

com.apple.driver.AppleAHCIPort    3.1.2

com.apple.driver.AppleSDXC    1.6.5

com.apple.driver.AppleUSBEHCI    705.4.14

com.apple.driver.AppleUSBXHCI    710.4.11

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.iokit.IOSerialFamily    11

com.apple.iokit.IOSlowAdaptiveClockingFamily    1.0.0

com.apple.kext.triggers    1.0

com.apple.driver.DspFuncLib    272.18

com.apple.kext.OSvKernDSPLib    1.15

com.apple.iokit.IOBluetoothHostControllerUSBTransport    4.3.4f4

com.apple.iokit.IOBluetoothFamily    4.3.4f4

com.apple.driver.AppleSMBusPCI    1.0.12d1

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.iokit.IOUSBUserClient    705.4.0

com.apple.driver.AppleSMBusController    1.0.13d1

com.apple.driver.X86PlatformPlugin    1.0.0

com.apple.iokit.IOFireWireIP    2.2.6

com.apple.iokit.IOSurface    97.4

com.apple.iokit.IOAcceleratorFamily2    156.14

com.apple.AppleGraphicsDeviceControl    3.10.22

com.apple.driver.AppleBacklightExpert    1.1.0

com.apple.iokit.IONDRVSupport    2.4.1

com.apple.iokit.IOGraphicsFamily    2.4.1

com.apple.driver.IOPlatformPluginFamily    5.9.1d7

com.apple.driver.AppleSMC    3.1.9

com.apple.driver.AppleUSBMultitouch    245.2

com.apple.iokit.IOUSBHIDDriver    705.4.0

com.apple.driver.AppleUSBMergeNub    705.4.0

com.apple.driver.AppleUSBComposite    705.4.9

com.apple.driver.CoreStorage    471.20.7

com.apple.iokit.IOSCSIMultimediaCommandsDevice    3.7.5

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    3.7.5

com.apple.driver.AppleThunderboltDPInAdapter    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.IO80211Family    730.60

com.apple.iokit.IOEthernetAVBController    1.0.3b3

com.apple.driver.mDNSOffloadUserClient    1.0.1b8

com.apple.iokit.IONetworkingFamily    3.2

com.apple.iokit.IOFireWireFamily    4.5.6

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.pthread    1

com.apple.kec.corecrypto    1.0

com.apple.kec.Libm    1

Unable to gather system configuration information.Model: MacBookPro9,2, BootROM MBP91.00D3.B08, 2 processors, Intel Core i5, 2.5 GHz, 16 GB, SMC 2.2f44

Graphics: Intel HD Graphics 4000, Intel HD Graphics 4000, Built-In

Memory Module: BANK 0/DIMM0, 8 GB, DDR3, 1600 MHz, 0x859B, 0x43543130323436344246313630422E433136

Memory Module: BANK 1/DIMM0, 8 GB, DDR3, 1600 MHz, 0x859B, 0x43543130323436344246313630422E433136

AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0xF5), Broadcom BCM43xx 1.0 (7.15.166.24.3)

Bluetooth: Version 4.3.4f4 15601, 3 services, 18 devices, 1 incoming serial ports

Network Service: Wi-Fi, AirPort, en1

Serial ATA Device: APPLE HDD HTS547550A9E384, 500.11 GB

Serial ATA Device: HL-DT-ST DVDRW  GS31N

USB Device: Hub

USB Device: FaceTime HD Camera (Built-in)

USB Device: Hub

USB Device: Hub

USB Device: BRCM20702 Hub

USB Device: Bluetooth USB Host Controller

USB Device: Apple Internal Keyboard / Trackpad

USB Device: IR Receiver

Thunderbolt Bus: MacBook Pro, Apple Inc., 25.1