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iMac won't shutdown- restarts after every shutdown

tonywalker23

tonywalker23

macrumors 6502a
Original poster
Dec 21, 2003
548
1,720
SC
I have not changed anything other than installing 11.3 2020 iMac 27". This week, every time with no exception, when I click on shut down it looks like it is shut down, the screen is black, and then it gives a warning screen and restarts. I thought the first time maybe I hit restart by accident or something. But clearly, about 7 times or so now, when I shut down it ends up restarting. sometimes ill hear the fan make a fast ramp-up for maybe a half-second while the screen is black. I've typed the same thing and submitted every time the submit report to apple dialog pops up.

Any ideas? Thanks.
IMG_0970.jpeg


panic(cpu 0 caller 0xffffff80106a2233): "PowerOff timed out in phase 'Notifying power plane drivers'. Total 30000 ms:
vfs_unmountall: 496 ms
PowerOff/Restart message to priority client: 807 ms @ 0x<ptr>, com.apple.iokit.IOStorageFamily(2.1)[58EA4506-4E6B-3AC3-A70D-ED35EE2C381D]@0x<ptr>->0x<ptr>
PowerOff/Restart message to priority client: 1085 ms @ 0x<ptr>, com.apple.iokit.IOStorageFamily(2.1)[58EA4506-4E6B-3AC3-A70D-ED35EE2C381D]@0x<ptr>->0x<ptr>
PowerOff/Restart message to priority client: 779 ms @ 0x<ptr>, com.apple.iokit.IOGraphicsFamily(585.1)[CC341A35-707F-3C8B-8EFD-925F742166A1]@0x<ptr>->0x<ptr>
PowerOff/Restart message to priority client: 467 ms @ 0x<ptr>, com.apple.driver.IOBluetoothHIDDriver(8.0.4d18)[C7A98902-D4B2-31CF-85D9-9CD22092A615]@0x<ptr>->0x<ptr>
PowerOff/Restart message to priority client: 403 ms @ 0x<ptr>, com.apple.driver.IOBluetoothHIDDriver(8.0.4d18)[C7A98902-D4B2-31CF-85D9-9CD22092A615]@0x<ptr>->0x<ptr>
PowerOff/Restart message to priority client: 617 ms @ 0x<ptr>, com.apple.driver.IOBluetoothHIDDriver(8.0.4d18)[C7A98902-D4B2-31CF-85D9-9CD22092A615]@0x<ptr>->0x<ptr>
PowerOff/Restart handler completed: 659 ms @ 0x<ptr>, com.apple.iokit.IOUSBHostFamily(1.2)[5190CA74-773E-3915-B4AA-8FDB4D1ED52B]@0x<ptr>->0x<ptr>
PowerOff/Restart handler completed: 1116 ms @ 0x<ptr>, com.apple.driver.AppleBCMWLANCoreMac(1.0)[C3558686-DD81-3A4C-9E3D-7A960866606A]@0x<ptr>->0x<ptr>
PowerOff/Restart still waiting on handler: 3222 ms @ 0x<ptr>, com.apple.iokit.IOUSBHostFamily(1.2)[5190CA74-773E-3915-B4AA-8FDB4D1ED52B]@0x<ptr>->0x<ptr>
"@/System/Volumes/Data/SWE/macOS/BuildRoots/2288acc43c/Library/Caches/com.apple.xbs/Sources/xnu/xnu-7195.101.1/iokit/Kernel/IOPMrootDomain.cpp:5814
Backtrace (CPU 0), Frame : Return Address
0xffffffc12851bb30 : 0xffffff800fe8e02d
0xffffffc12851bb80 : 0xffffff800ffd48e3
0xffffffc12851bbc0 : 0xffffff800ffc4eda
0xffffffc12851bc10 : 0xffffff800fe32a2f
0xffffffc12851bc30 : 0xffffff800fe8d84d
0xffffffc12851bd50 : 0xffffff800fe8db43
0xffffffc12851bdc0 : 0xffffff801069d68a
0xffffffc12851be30 : 0xffffff80106a2233
0xffffffc12851be50 : 0xffffff801060f4c9
0xffffffc12851be80 : 0xffffff800fed44b5
0xffffffc12851bef0 : 0xffffff800fed5424
0xffffffc12851bfa0 : 0xffffff800fe3213e

Process name corresponding to current thread: kernel_task
Boot args: chunklist-security-epoch=0 -chunklist-no-rev2-dev

Mac OS version:
20E232

Kernel version:
Darwin Kernel Version 20.4.0: Fri Mar 5 01:14:14 PST 2021; root:xnu-7195.101.1~3/RELEASE_X86_64
Kernel UUID: BB2FFEBA-7D53-301F-A238-9867CA51276F
KernelCache slide: 0x000000000fc00000
KernelCache base: 0xffffff800fe00000
Kernel slide: 0x000000000fc10000
Kernel text base: 0xffffff800fe10000
__HIB text base: 0xffffff800fd00000
System model name: iMac20,1 (Mac-CFF7D910A743CAAF)
System shutdown begun: YES
Hibernation exit count: 0

System uptime in nanoseconds: 294817477643
Last Sleep: absolute base_tsc base_nano
Uptime : 0x00000044a47dbb63
Sleep : 0x0000000000000000 0x0000000000000000 0x0000000000000000
Wake : 0x0000000000000000 0x0000001a1d4f2ad2 0x0000000000000000
last started kext at 23388983294: >!AActuatorDriver 4440.3 (addr 0xffffff8010fd1000, size 28672)
loaded kexts:
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>!ATopCaseHIDEventDriver 4040.11
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|IOUserEthernet 1.0.1
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>!ABacklightExpert 1.1.0
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>!ASMBus!C 1.0.18d1
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|IODVD!S!F 1.8
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>usb.cdc.ecm 5.0.0
>usb.cdc.ncm 5.0.0
>usb.cdc 5.0.0
>usb.networking 5.0.0
>usb.!UHostCompositeDevice 1.2
>!AThunderboltPCIDownAdapter 4.1.1
>!AThunderboltDPInAdapter 8.1.4
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>!A!ILpssI2C 3.0.60
>!A!ILpssDmac 3.0.60
>!ABSDKextStarter 3
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@filesystems.hfs.encodings.kext 1
>!AThunderboltNHI 7.2.8
|IOThunderbolt!F 9.3.2
>!ABCMWLANCoreMac 1.0.0
|IOSerial!F 11
|IO80211!FV2 1200.12.2b1
|IOSkywalk!F 1
>mDNSOffloadUserClient 1.0.1b8
>IOImageLoader 1.0.0
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>usb.!UVHCICommon 1.0
>!AEffaceableNOR 1.0
>usb.!UHostPacketFilter 1.0
|IOUSB!F 900.4.2
|IOBufferCopy!C 1.1.0
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>usb.!UXHCI 1.2
>!AEFINVRAM 2.1
>!AEFIRuntime 2.1
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$!AImage4 3.0.0
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|IO!B!F 8.0.4d18
|IOReport!F 47
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$quarantine 4
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@Kext.!AMatch 1.0.0d1
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>!ASSE 1.0
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>!AMobileFileIntegrity 1.0.5
@kext.CoreTrust 1
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|IOUSBHost!F 1.2
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>IOSlaveProcessor 1
>!AACPIPlatform 6.1
>!ASMC 3.1.9
|IOPCI!F 2.9
|IOACPI!F 1.4
>watchdog 1
@kec.pthread 1
@kec.corecrypto 11.1
@kec.Libm 1
 
Your system crashed with a panic during shutdown which forced the reboot.

If you startup in single user mode and then shutdown does it still restart?
 
I have a surefire way to shut it down... forever.

Sorry, that wasn’t helpful.
 
I'd try resetting SMC.
  1. Shut down your Mac, then unplug the power cable.
  2. Wait 15 seconds, then plug the power cable back in.
  3. Wait 5 seconds, then press the power button to turn on your Mac.
 
tonywalker23 said:
panic(cpu 0 caller 0xffffff80106a2233): "PowerOff timed out in phase 'Notifying power plane drivers'. Total 30000 ms:
Click to expand...

tonywalker23 said:
PowerOff/Restart still waiting on handler: 3222 ms @ 0x<ptr>, com.apple.iokit.IOUSBHostFamily(1.2)[5190CA74-773E-3915-B4AA-
Click to expand...

I was getting a similar panic, but the one which hung was different:

panic(cpu 0 caller 0xffffff801e8a2233): "PowerOff timed out in phase 'Notifying power plane drivers'. Total 30000 ms:

PowerOff/Restart still waiting on handler: 3002 ms @ 0x<ptr>, com.apple.driver.AppleThunderboltNHI(7.2.8)[75297F54-C9FE-3CB0-80E6-F8C6E0C89BE9]@0x<ptr>->0x<ptr>

Not sure what device is controlled by IOUSBHostFamily but you have a lot of devices that are getting power off instructions. My suggestion is to disconnect EVERYTHING from your iMac other than your keyboard and try a couple of shutdowns/startups. Sometimes it takes a couple for things to clear. If the problem goes away add things back one by one until you can identify the offending device.

In my case I disconnected all thunderbolt cables and after a couple of shutdowns/restarts the panics went away. Added them back one by one until the offending port was identified (a thunderbolt bridge).
 
HD Fan, does that mean that one of the devices you had 'went bad' hardware related? in my case it seems like it was a SD card in the slot on the back of the iMac, and it also didn't start until the Big Sur update this past week.
 
tonywalker23 said:
HD Fan, does that mean that one of the devices you had 'went bad' hardware related?
Click to expand...

No, it was/is a Big Sur problem with the thunderbolt bridge network adapter. It got broken in 11.3. Supposedly fixed in 11.4.
 
tonywalker23 said:
I have not changed anything other than installing 11.3 2020 iMac 27". This week, every time with no exception, when I click on shut down it looks like it is shut down, the screen is black, and then it gives a warning screen and restarts. I thought the first time maybe I hit restart by accident or something. But clearly, about 7 times or so now, when I shut down it ends up restarting. sometimes ill hear the fan make a fast ramp-up for maybe a half-second while the screen is black. I've typed the same thing and submitted every time the submit report to apple dialog pops up.

Any ideas? Thanks. View attachment 1768251

panic(cpu 0 caller 0xffffff80106a2233): "PowerOff timed out in phase 'Notifying power plane drivers'. Total 30000 ms:
vfs_unmountall: 496 ms
PowerOff/Restart message to priority client: 807 ms @ 0x<ptr>, com.apple.iokit.IOStorageFamily(2.1)[58EA4506-4E6B-3AC3-A70D-ED35EE2C381D]@0x<ptr>->0x<ptr>
PowerOff/Restart message to priority client: 1085 ms @ 0x<ptr>, com.apple.iokit.IOStorageFamily(2.1)[58EA4506-4E6B-3AC3-A70D-ED35EE2C381D]@0x<ptr>->0x<ptr>
PowerOff/Restart message to priority client: 779 ms @ 0x<ptr>, com.apple.iokit.IOGraphicsFamily(585.1)[CC341A35-707F-3C8B-8EFD-925F742166A1]@0x<ptr>->0x<ptr>
PowerOff/Restart message to priority client: 467 ms @ 0x<ptr>, com.apple.driver.IOBluetoothHIDDriver(8.0.4d18)[C7A98902-D4B2-31CF-85D9-9CD22092A615]@0x<ptr>->0x<ptr>
PowerOff/Restart message to priority client: 403 ms @ 0x<ptr>, com.apple.driver.IOBluetoothHIDDriver(8.0.4d18)[C7A98902-D4B2-31CF-85D9-9CD22092A615]@0x<ptr>->0x<ptr>
PowerOff/Restart message to priority client: 617 ms @ 0x<ptr>, com.apple.driver.IOBluetoothHIDDriver(8.0.4d18)[C7A98902-D4B2-31CF-85D9-9CD22092A615]@0x<ptr>->0x<ptr>
PowerOff/Restart handler completed: 659 ms @ 0x<ptr>, com.apple.iokit.IOUSBHostFamily(1.2)[5190CA74-773E-3915-B4AA-8FDB4D1ED52B]@0x<ptr>->0x<ptr>
PowerOff/Restart handler completed: 1116 ms @ 0x<ptr>, com.apple.driver.AppleBCMWLANCoreMac(1.0)[C3558686-DD81-3A4C-9E3D-7A960866606A]@0x<ptr>->0x<ptr>
PowerOff/Restart still waiting on handler: 3222 ms @ 0x<ptr>, com.apple.iokit.IOUSBHostFamily(1.2)[5190CA74-773E-3915-B4AA-8FDB4D1ED52B]@0x<ptr>->0x<ptr>
"@/System/Volumes/Data/SWE/macOS/BuildRoots/2288acc43c/Library/Caches/com.apple.xbs/Sources/xnu/xnu-7195.101.1/iokit/Kernel/IOPMrootDomain.cpp:5814
Backtrace (CPU 0), Frame : Return Address
0xffffffc12851bb30 : 0xffffff800fe8e02d
0xffffffc12851bb80 : 0xffffff800ffd48e3
0xffffffc12851bbc0 : 0xffffff800ffc4eda
0xffffffc12851bc10 : 0xffffff800fe32a2f
0xffffffc12851bc30 : 0xffffff800fe8d84d
0xffffffc12851bd50 : 0xffffff800fe8db43
0xffffffc12851bdc0 : 0xffffff801069d68a
0xffffffc12851be30 : 0xffffff80106a2233
0xffffffc12851be50 : 0xffffff801060f4c9
0xffffffc12851be80 : 0xffffff800fed44b5
0xffffffc12851bef0 : 0xffffff800fed5424
0xffffffc12851bfa0 : 0xffffff800fe3213e

Process name corresponding to current thread: kernel_task
Boot args: chunklist-security-epoch=0 -chunklist-no-rev2-dev

Mac OS version:
20E232

Kernel version:
Darwin Kernel Version 20.4.0: Fri Mar 5 01:14:14 PST 2021; root:xnu-7195.101.1~3/RELEASE_X86_64
Kernel UUID: BB2FFEBA-7D53-301F-A238-9867CA51276F
KernelCache slide: 0x000000000fc00000
KernelCache base: 0xffffff800fe00000
Kernel slide: 0x000000000fc10000
Kernel text base: 0xffffff800fe10000
__HIB text base: 0xffffff800fd00000
System model name: iMac20,1 (Mac-CFF7D910A743CAAF)
System shutdown begun: YES
Hibernation exit count: 0

System uptime in nanoseconds: 294817477643
Last Sleep: absolute base_tsc base_nano
Uptime : 0x00000044a47dbb63
Sleep : 0x0000000000000000 0x0000000000000000 0x0000000000000000
Wake : 0x0000000000000000 0x0000001a1d4f2ad2 0x0000000000000000
last started kext at 23388983294: >!AActuatorDriver 4440.3 (addr 0xffffff8010fd1000, size 28672)
loaded kexts:
@nke.webcontentfilter 5
>!ATopCaseHIDEventDriver 4040.11
>!AHIDALSService 1
>AGPM 122
>!APlatformEnabler 2.7.0d0
>X86PlatformShim 1.0.0
@filesystems.autofs 3.0
>!AUpstreamUserClient 3.6.8
@kext.AMDRadeonX6000 4.0.4
@fileutil 20.036.15
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$!AImage4 3.0.0
|IOTimeSync!F 980.4
|IONetworking!F 3.4
>DiskImages 493.0.0
|IO!B!F 8.0.4d18
|IOReport!F 47
|IO!BPacketLogger 8.0.4d18
$quarantine 4
$sandbox 300.0
@Kext.!AMatch 1.0.0d1
|CoreAnalytics!F 1
>!ASSE 1.0
>!AKeyStore 2
>!UTDM 511.101.1
|IOUSBMass!SDriver 184.101.1
|IOSCSIBlockCommandsDevice 436.100.4
|IO!S!F 2.1
|IOSCSIArchitectureModel!F 436.100.4
>!AMobileFileIntegrity 1.0.5
@kext.CoreTrust 1
>!AFDEKeyStore 28.30
>!AEffaceable!S 1.0
>!ACredentialManager 1.0
>KernelRelayHost 1
|IOUSBHost!F 1.2
>!UHostMergeProperties 1.2
>usb.!UCommon 1.0
>!ABusPower!C 1.0
>!ASEPManager 1.0.1
>IOSlaveProcessor 1
>!AACPIPlatform 6.1
>!ASMC 3.1.9
|IOPCI!F 2.9
|IOACPI!F 1.4
>watchdog 1
@kec.pthread 1
@kec.corecrypto 11.1
@kec.Libm 1
Click to expand...
I have exactly the same thing. Did you fixed it?
 
Best i can recall, i ended up taking a SD card out of the back that seemed to be the reason. It started after the OS update if I recall. However, it has still done it on a couple of occasions for no reason i can pin down.
 
tonywalker23 said:
Best i can recall, i ended up taking a SD card out of the back that seemed to be the reason. It started after the OS update if I recall. However, it has still done it on a couple of occasions for no reason i can pin down.
Click to expand...
For me, it starts with Big Sur update. And I don’t use sd card slot, the kernel panic is exactly the same. I just can’t shutdown iMa, always restarts with this error..
 
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