Back-UPS 500 and iMac 21.5 causing fatal crash

Anonymous user · ‎2021-06-29

Hi,

Can anyone help with this problem?

I have a Back-UPS 500 connected to my iMac 21.5 and nothing else, no software monitoring, just power supply.

We've had a few minor power interruptions recently, only a few seconds at a time and the UPS has coped fine.

However the last interruption (of a few seconds) resulted in a Fatal Crash - meaning the computer was still being powered, but I got the Black box on the screen saying I must shut down and restart.

What could cause this? Could it be that the battery is failing (3-4 years old) and not quite enough voltage is being supplied causing the iMac to crash but still being powered?

I don't want to test it again for fear of damaging my Mac.

Any advice welcome and thanks in advance.

Max

Anonymous user · ‎2021-06-29

...it could be hardware related I see mention of a "page fault" which could indicate a loose or defective RAM memory module. If the iMac Power supply had a slight dip in output during the transition of the UPS to battery it could cause a marginal electrical connection - eg to the memory on your iMac's mainboard - to show itself....You could try removing and re-inserting your memory sticks first ?

*Note: Memory replacement on the iMac (21.5-inch, Late 2012) and iMac (21.5-inch, Late 2013) is not user-removable and must be done by an Apple Retail Store or Apple Authorized Service Provider.

...could also be related to 3rd party drivers: You could try removing these drivers, one at a time, and see if the panic re-occurs.

com.yourcompany.driver.gakl_driver 1

com.Cycling74.driver.Soundflower 1.6.6

com.logmein.driver.LogMeInSoundDriver 1.0.3

com.pctools.iantivirus.kfs 1.0.1

com.dvdfab.kext.fabio 1

You can also hold the shift key down at startup to enter Safe Mode, which disables all third-party software like this.

See Answer In Context

BillP · ‎2021-06-29

Can you clarify - you said no software monitoring - does that mean that you also do not have a USB cable connected between the UPS and the iMac? Because there is the option for the APC PowerChute and then native support within Mac OS so I just wanted to clarify that you meant neither are actively running and the USB cable is completely disconnected even if you are not using those tools.

Is there an event log within Mac OS you could look at to see why it logged a crash? This is difficult to say for sure, especially if it's been working fine for a long time. Either way, I don't think it is related to the battery in the UPS (just yet). It could've just been a coincidence too. If there is no data cable connected between the UPS and iMac, then I also don't see how this would be anything beyond an issue perhaps with the transfer time of the UPS to battery or an issue the iMac has with the step approximated sinewave that the UPS outputs while on battery but I am skeptical because if it was working fine for years, it doesn't make sense to me that a problem of this type developed over time.

My thought is to somehow test the battery back up operation. If you don't want to test it with the Mac again, you could at least verify it's basic operation with something like a lamp or similar to see what happens.

Anonymous user · ‎2021-06-29

Hi, Thanks for your reply,

I've no software or USB attached, it is just simply a power back-up connection.

When the power interruption occurred the crash happened at the EXACT same time, hence why I thought the iMac might have detected a change in power supply and caused a kernel panic?

I did find a Log and pasted it is pasted in below if it is any help - I don't really know what I am looking at?

Sun Mar 16 10:17:43 2014

panic(cpu 3 caller 0x2abf6a): Kernel trap at 0x0029a424, type 14=page fault, registers:

CR0: 0x8001003b, CR2: 0x00200028, CR3: 0x00100000, CR4: 0x00000660

EAX: 0x00005458, EBX: 0x00200020, ECX: 0x09005458, EDX: 0x00200020

CR2: 0x00200028, EBP: 0x5c74b8f8, ESI: 0x0d4e3a68, EDI: 0x06ecd004

EFL: 0x00010002, EIP: 0x0029a424, CS: 0x00000008, DS: 0x0b350010

Error code: 0x00000003

Backtrace (CPU 3), Frame : Return Address (4 potential args on stack)

0x5c74b718 : 0x21b837 (0x5dd7fc 0x5c74b74c 0x223ce1 0x0)

0x5c74b768 : 0x2abf6a (0x59e3d0 0x29a424 0xe 0x59e59a)

0x5c74b848 : 0x2a1a78 (0x5c74b860 0x0 0x5c74b8f8 0x29a424)

0x5c74b858 : 0x29a424 (0xe 0xd4d0048 0xd4d0070 0xd4d0010)

0x5c74b8f8 : 0x2e30be (0x200020 0x1 0x86a86c 0x121c6e04)

0x5c74b918 : 0x5c7c0a1d (0x200020 0x121c6e00 0x5c74b968 0x270537)

0x5c74b958 : 0x2fa913 (0x5c74b974 0x13e5e3e4 0x5c74b988 0x4aae1c)

0x5c74b988 : 0x2e08ac (0xd4e3a68 0x13e5e3e4 0x0 0x2)

0x5c74b9e8 : 0x2e0a0b (0xd4e3a68 0x1 0x5c74ba18 0x2da5a0)

0x5c74ba38 : 0x2e514a (0x0 0x10b8c30 0x5c74ba48 0x5c74ba48)

0x5c74baa8 : 0x2f03c6 (0x957c290 0x0 0x1b 0x226b4e)

0x5c74baf8 : 0x2f0455 (0x957c290 0x80000 0x1 0x13e5e3e4)

0x5c74bb28 : 0x2e00a5 (0x957c290 0x80000 0x13e5e3e4 0x0)

0x5c74bd48 : 0x495644 (0x822fc0 0x8c8d4f0 0x1 0x5c74bdc0)

0x5c74bd98 : 0x495786 (0x5c74bdc0 0x30 0x587000 0x14)

0x5c74be38 : 0x2e1f4a (0x870e2a0 0x8c8d4e4 0x4 0x0)

0x5c74bec8 : 0x494358 (0x5c74bf28 0x3 0x0 0x0)

0x5c74bf78 : 0x4f82fb (0x870e2a0 0x92682a8 0x13e5e324 0x1)

0x5c74bfc8 : 0x2a251d (0x92682a4 0x0 0x10 0x92682a4)

Kernel Extensions in backtrace (with dependencies):

com.apple.filesystems.smbfs(1.6.7)@0x5c7ae000->0x5c7e1fff

BSD process name corresponding to current thread: KernelEventAgent

Mac OS version:

10K549

Kernel version:

Darwin Kernel Version 10.8.0: Tue Jun 7 16:33:36 PDT 2011; root:xnu-1504.15.3~1/RELEASE_I386

System model name: iMac11,2 (Mac-F2238AC8)

System uptime in nanoseconds: 575150870248515

unloaded kexts:

com.apple.driver.AppleMultitouchDriver 207.11 (addr 0x5c6a5000, size 0x36864) - last unloaded 334325352507294

loaded kexts:

com.yourcompany.driver.gakl_driver 1

com.Cycling74.driver.Soundflower 1.6.6

com.logmein.driver.LogMeInSoundDriver 1.0.3

com.pctools.iantivirus.kfs 1.0.1

com.dvdfab.kext.fabio 1

com.apple.driver.AppleBluetoothMultitouch 54.3 - last loaded 505004537949999

com.apple.filesystems.afpfs 9.7.1

com.apple.nke.asp_tcp 5.0

com.apple.filesystems.smbfs 1.6.7

com.apple.filesystems.autofs 2.1.0

com.apple.driver.AGPM 100.12.31

com.apple.driver.AppleHWSensor 1.9.3d0

com.apple.driver.AppleUpstreamUserClient 3.5.7

com.apple.driver.AudioAUUC 1.57

com.apple.driver.AppleMCCSControl 1.0.20

com.apple.driver.AppleMikeyHIDDriver 1.2.0

com.apple.kext.ATIFramebuffer 6.3.6

com.apple.Dont_Steal_Mac_OS_X 7.0.0

com.apple.driver.AppleMikeyDriver 2.0.5f14

com.apple.ATIRadeonX2000 6.3.6

com.apple.driver.AppleHDA 2.0.5f14

com.apple.driver.AudioIPCDriver 1.1.6

com.apple.iokit.AppleBCM5701Ethernet 3.0.5b8

com.apple.driver.AirPort.Atheros21 425.14.7

com.apple.driver.ACPI_SMC_PlatformPlugin 4.7.0a1

com.apple.driver.AppleLPC 1.5.1

com.apple.driver.AppleBacklight 170.0.46

com.apple.driver.AppleIRController 303.8

com.apple.driver.AppleUSBCardReader 2.6.1

com.apple.BootCache 31.1

com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1

com.apple.iokit.SCSITaskUserClient 2.6.8

com.apple.iokit.IOAHCIBlockStorage 1.6.4

com.apple.driver.AppleUSBHub 4.2.4

com.apple.driver.AppleFWOHCI 4.7.3

com.apple.driver.AppleEFINVRAM 1.4.0

com.apple.driver.AppleAHCIPort 2.1.7

com.apple.driver.AppleUSBEHCI 4.2.4

com.apple.driver.AppleACPIButtons 1.3.6

com.apple.driver.AppleRTC 1.3.1

com.apple.driver.AppleHPET 1.5

com.apple.driver.AppleSMBIOS 1.7

com.apple.driver.AppleACPIEC 1.3.6

com.apple.driver.AppleAPIC 1.4

com.apple.driver.AppleIntelCPUPowerManagementClient 142.6.0

com.apple.security.sandbox 1

com.apple.security.quarantine 0

com.apple.nke.applicationfirewall 2.1.14

com.apple.driver.AppleIntelCPUPowerManagement 142.6.0

com.apple.driver.IOBluetoothHIDDriver 2.4.5f3

com.apple.driver.AppleMultitouchDriver 207.11

com.apple.driver.AppleProfileReadCounterAction 17

com.apple.driver.AppleProfileTimestampAction 10

com.apple.driver.AppleProfileThreadInfoAction 14

com.apple.driver.AppleProfileRegisterStateAction 10

com.apple.driver.AppleProfileKEventAction 10

com.apple.driver.AppleProfileCallstackAction 20

com.apple.iokit.IOSurface 74.2

com.apple.iokit.IOBluetoothSerialManager 2.4.5f3

com.apple.iokit.IOSerialFamily 10.0.3

com.apple.driver.DspFuncLib 2.0.5f14

com.apple.driver.AppleSMBusController 1.0.10d0

com.apple.kext.ATI4600Controller 6.3.6

com.apple.kext.ATISupport 6.3.6

com.apple.iokit.IOFireWireIP 2.0.3

com.apple.driver.AppleUSBAudio 2.7.6f6

com.apple.iokit.IOAudioFamily 1.8.3fc2

com.apple.kext.OSvKernDSPLib 1.3

com.apple.iokit.AppleProfileFamily 41

com.apple.driver.AppleHDAController 2.0.5f14

com.apple.iokit.IOHDAFamily 2.0.5f14

com.apple.iokit.IO80211Family 320.1

com.apple.iokit.IONetworkingFamily 1.10

com.apple.driver.AppleSMC 3.1.0d5

com.apple.driver.IOPlatformPluginFamily 4.7.0a1

com.apple.driver.AppleSMBusPCI 1.0.10d0

com.apple.driver.AppleBacklightExpert 1.0.1

com.apple.iokit.IONDRVSupport 2.2.1

com.apple.iokit.IOGraphicsFamily 2.2.1

com.apple.driver.AppleUSBHIDKeyboard 141.5

com.apple.driver.AppleHIDKeyboard 141.5

com.apple.driver.BroadcomUSBBluetoothHCIController 2.4.5f3

com.apple.driver.AppleUSBBluetoothHCIController 2.4.5f3

com.apple.iokit.IOBluetoothFamily 2.4.5f3

com.apple.iokit.IOUSBHIDDriver 4.2.0

com.apple.iokit.IOUSBMassStorageClass 2.6.7

com.apple.iokit.IOSCSIBlockCommandsDevice 2.6.8

com.apple.driver.AppleUSBMergeNub 4.2.4

com.apple.driver.AppleUSBComposite 3.9.0

com.apple.iokit.IOSCSIMultimediaCommandsDevice 2.6.8

com.apple.iokit.IOBDStorageFamily 1.6

com.apple.iokit.IODVDStorageFamily 1.6

com.apple.iokit.IOCDStorageFamily 1.6.1

com.apple.driver.XsanFilter 402.1

com.apple.iokit.IOAHCISerialATAPI 1.2.6

com.apple.iokit.IOSCSIArchitectureModelFamily 2.6.8

com.apple.iokit.IOFireWireFamily 4.2.6

com.apple.iokit.IOUSBUserClient 4.2.4

com.apple.iokit.IOAHCIFamily 2.0.6

com.apple.iokit.IOUSBFamily 4.2.4

com.apple.driver.AppleEFIRuntime 1.4.0

com.apple.iokit.IOHIDFamily 1.6.6

com.apple.iokit.IOSMBusFamily 1.1

com.apple.security.TMSafetyNet 6

com.apple.kext.AppleMatch 1.0.0d1

com.apple.driver.DiskImages 289

com.apple.iokit.IOStorageFamily 1.6.3

com.apple.driver.AppleACPIPlatform 1.3.6

com.apple.iokit.IOPCIFamily 2.6.5

com.apple.iokit.IOACPIFamily 1.3.0

Anonymous user · ‎2021-06-29

...it could be hardware related I see mention of a "page fault" which could indicate a loose or defective RAM memory module. If the iMac Power supply had a slight dip in output during the transition of the UPS to battery it could cause a marginal electrical connection - eg to the memory on your iMac's mainboard - to show itself....You could try removing and re-inserting your memory sticks first ?

*Note: Memory replacement on the iMac (21.5-inch, Late 2012) and iMac (21.5-inch, Late 2013) is not user-removable and must be done by an Apple Retail Store or Apple Authorized Service Provider.

...could also be related to 3rd party drivers: You could try removing these drivers, one at a time, and see if the panic re-occurs.

com.yourcompany.driver.gakl_driver 1

com.Cycling74.driver.Soundflower 1.6.6

com.logmein.driver.LogMeInSoundDriver 1.0.3

com.pctools.iantivirus.kfs 1.0.1

com.dvdfab.kext.fabio 1

You can also hold the shift key down at startup to enter Safe Mode, which disables all third-party software like this.