Random OS Crashing with Screen Going Black but Power Stays On

Number:rdar://49800699 Date Originated:04/10/2019
Status:open Resolved:no
Product:Mac OS Product Version:Mac OS 10.7.5 (11G63)
Classification:crash/hang/hardware Reproducible:random/sometimes
Summary:  Occasionally at random times, the iMac 24-Inch, Late 2006 will just go black but stay powered on until I press and hold the power button to hard shut down then power-on again.

I’ve tried replacing the hard drive (was failing), coin cell battery (was low), and cleaned dust from fans.  I’ve tried checking the RAM with MEMTEST 86+ for days with no errors.  The problem still occurs.

I recently removed one of the RAM modules (1GB).  The modules are of the same manufacturer (ELPIDA) and listed on the sticker as:  PC2-6400S-666.  Does it matter that one was 1GB and the other is 2GB?  I'm not sure if these iMacs run in dual-channel?

If possible I would greatly appreciate some help deciphering this error report so I may determine what is causing the random crashing.  Thank you.

Steps to Reproduce:  Just be using the iMac at any given time, browsing web; even just minutes or hours after rebooting; or whenever.

Expected Results:  Normal operation of the LCD screen and no crashes expected.

Actual Results:  iMac LCD panel goes black but fan still runs.  After hard power-off then power on, Problem Reporter appears with text details of the issue.

Version/Build:  Mac OS 10.7.5 (11G63)

Configuration:  1x 2GB 667MHz DDR2 SDRAM (Mftr: ELPIDA)

Please see below for the error report text details:

Interval Since Last Panic Report:  2583718 sec
Panics Since Last Report:          11
Anonymous UUID:                    83B7E28F-4397-4928-BC57-C4030288EEB6

Wed Apr 10 21:32:50 2019
panic(cpu 1 caller 0xc333f1): NVRM[0/1:0:0]: Read Error 0x00600140: CFG 0xffffffff 0xffffffff 0xffffffff, BAR0 0xc9000000 0x4a226000 0x04b500a2, D0, P0/1
Backtrace (CPU 1), Frame : Return Address (4 potential args on stack)
0x43af3d48 : 0x2203de (0x6b08cc 0x43af3d68 0x229fb0 0x0) 
0x43af3d78 : 0xc333f1 (0xe3c0e0 0xe92ef0 0xe4faf0 0x0) 
0x43af3df8 : 0xd34e0e (0x7d88404 0x720c004 0x600140 0x8a4b828) 
0x43af3e38 : 0x1571b40 (0x720c004 0x600140 0x43af3e68 0x1571c14) 
0x43af3e48 : 0x1571c14 (0x720c004 0x8a48004 0x600140 0xcf51c8) 
0x43af3e68 : 0xcf9d37 (0x720c004 0x8a48004 0x2c00 0x720c004) 
0x43af3e88 : 0xdad683 (0x720c004 0x8a48004 0x0 0x0) 
0x43af3ed8 : 0xc20b05 (0x720c004 0x0 0x0 0x0) 
0x43af3f68 : 0xbd562c (0x720c004 0x7325be8 0x43af3fa8 0x22ee1a) 
0x43af3f98 : 0x23e4ae (0x7e0a000 0x720c004 0x0 0x2c7098) 
0x43af3fc8 : 0x2c7d0c (0x84ad60 0x0 0x10 0x7ef2910) 
      Kernel Extensions in backtrace:
            dependency: com.apple.iokit.IOPCIFamily(2.7)[8087C029-833E-4B62-A8C3-2B074B4C55F7]@0xb5c000
            dependency: com.apple.iokit.IONDRVSupport(2.3.4)[393829BA-614C-4ED7-B4AD-CE577A41C683]@0xbbd000
            dependency: com.apple.iokit.IOGraphicsFamily(2.3.4)[EE3F8FBE-3457-4F0E-A3A3-B9B1A44DCF6B]@0xb89000
            dependency: com.apple.NVDAResman.G7xxx(7.0.4)[6581C9F3-3221-4530-BEB4-627CB8D602AE]@0xbce000

BSD process name corresponding to current thread: kernel_task

Mac OS version:

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: iMac6,1 (Mac-F4218FC8)

System uptime in nanoseconds: 50537323501
last loaded kext at 23528568216: com.apple.driver.AppleHWSensor	1.9.5d0 (addr 0x2bb3000, size 28672)
loaded kexts:
com.paceap.kext.pacesupport.snowleopard	5.9.1
com.hzsystems.terminus.driver	4
com.digidesign.iokit.DigiDal	10.3.10d4
com.roxio.BluRaySupport	1.1.6
com.apple.driver.AppleHWSensor	1.9.5d0
com.apple.filesystems.autofs	3.0
com.apple.driver.IOBluetoothA2DPAudioDriver	4.0.8f17
com.apple.driver.AppleHDAHardwareConfigDriver	2.2.5a5
com.apple.driver.AppleHDA	2.2.5a5
com.apple.driver.AppleSMCPDRC	5.0.0d8
com.apple.driver.AppleUpstreamUserClient	3.5.9
com.apple.driver.AudioAUUC	1.59
com.apple.driver.AppleTyMCEDriver	1.0.2d2
com.apple.GeForce	7.3.2
com.apple.GeForce7xxx	7.0.4
com.apple.driver.AppleLPC	1.6.0
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.driver.AppleMuxControl	3.1.33
com.apple.driver.AppleBacklight	170.2.2
com.apple.driver.AppleMCCSControl	1.0.33
com.apple.driver.CSRUSBBluetoothHCIController	4.0.8f17
com.apple.driver.AppleIRController	312
com.apple.driver.CSRHIDTransitionDriver	4.0.8f17
com.apple.AppleFSCompression.AppleFSCompressionTypeDataless	1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib	1.0.0d1
com.apple.BootCache	33
com.apple.iokit.SCSITaskUserClient	3.2.1
com.apple.driver.XsanFilter	404
com.apple.iokit.IOAHCIBlockStorage	2.1.0
com.apple.driver.AppleHPET	1.7
com.apple.driver.AppleAHCIPort	2.3.1
com.apple.driver.AppleUSBHub	5.1.0
com.apple.driver.AppleIntelPIIXATA	2.5.1
com.apple.driver.AppleUSBEHCI	5.1.0
com.apple.driver.AppleUSBUHCI	5.1.0
com.apple.driver.AirPortBrcm43224	501.36.15
com.apple.iokit.AppleYukon2	3.2.2b1
com.apple.driver.AppleFWOHCI	4.9.0
com.apple.driver.AppleEFINVRAM	1.6.1
com.apple.driver.AppleRTC	1.5
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.nvidia.nv50hal	7.3.2
com.apple.nvidia.nvGK100hal	7.3.2
com.apple.nvidia.nvGF100hal	7.3.2
com.apple.NVDAResman	7.3.2
com.apple.nvidia.nv40hal.G7xxx	7.0.4
com.apple.NVDAResman.G7xxx	7.0.4
com.apple.iokit.IOSurface	80.0.2
com.apple.iokit.IOSerialFamily	10.0.5
com.apple.iokit.IOFireWireIP	2.2.5
com.apple.driver.AppleHDAController	2.2.5a5
com.apple.iokit.IOHDAFamily	2.2.5a5
com.apple.iokit.IOAudioFamily	1.8.6fc18
com.apple.kext.OSvKernDSPLib	1.3
com.apple.driver.AppleSMC	3.1.3d10
com.apple.driver.IOPlatformPluginLegacy	5.0.0d8
com.apple.driver.IOPlatformPluginFamily	5.1.1d6
com.apple.driver.AppleSMBusPCI	1.0.10d0
com.apple.driver.AppleGraphicsControl	3.1.33
com.apple.driver.AppleBacklightExpert	1.0.4
com.apple.iokit.IONDRVSupport	2.3.4
com.apple.driver.AppleSMBusController	1.0.10d0
com.apple.iokit.IOGraphicsFamily	2.3.4
com.apple.driver.AppleUSBBluetoothHCIController	4.0.8f17
com.apple.iokit.IOBluetoothFamily	4.0.8f17
com.apple.driver.AppleFileSystemDriver	13
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.IOAHCIFamily	2.0.8
com.apple.iokit.IOUSBUserClient	5.0.0
com.apple.iokit.IOATAFamily	2.5.1
com.apple.iokit.IOUSBFamily	5.1.0
com.apple.iokit.IO80211Family	420.3
com.apple.iokit.IONetworkingFamily	2.1
com.apple.iokit.IOFireWireFamily	4.4.8
com.apple.driver.AppleEFIRuntime	1.6.1
com.apple.iokit.IOHIDFamily	1.7.1
com.apple.iokit.IOSMBusFamily	1.1
com.apple.security.sandbox	177.8
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
Model: iMac6,1, BootROM IM61.0093.B07, 2 processors, Intel Core 2 Duo, 2.16 GHz, 2 GB, SMC 1.10f3
Graphics: NVIDIA GeForce 7300 GT, NVIDIA GeForce 7300 GT, PCIe, 128 MB
Memory Module: BANK 0/DIMM0, 2 GB, DDR2 SDRAM, 667 MHz, 0x7F7FFE0000000000, 0x4542453231554538414653412D38472D4620
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x87), Broadcom BCM43xx 1.0 (
Bluetooth: Version 4.0.8f17, 2 service, 18 devices, 1 incoming serial ports
Network Service: Wi-Fi, AirPort, en1
Serial ATA Device: WDC WD3200AAKS-75L9A0, 320.07 GB
Parallel ATA Device: MATSHITADVD-R   UJ-85J
USB Device: USB Receiver, 0x046d  (Logitech Inc.), 0xc52b, 0x1d100000 / 2
USB Device: Wireless Receiver, 0x248a, 0x00da, 0x5d100000 / 2
USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x8206, 0x7d100000 / 3
USB Device: IR Receiver, apple_vendor_id, 0x8240, 0x7d200000 / 2


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