'Notifying power plane drivers' error message on restart?

[nk_e]

Lately, this message has been popping up a lot after a normal restart.

panic(cpu 2 caller 0xffffff801091e44c): Restart timed out in phase 'Notifying power plane drivers'. Total 30000 ms:
vfs_unmountall: 2088 ms

I've not seen this 'Notifying power plane drivers' message before.

Also, in the problem report generated after start up (copied at the bottom of this post), I see this referred to a lot in the first set of messages:

PowerOff/Restart still waiting on handler: 3873 ms @ 0x<ptr>, com.apple.iokit.IOUSBFamily(900.4.2)[76AC42C9-AD5F-36A2-85C3-2E66B82E2C0B]@0x<ptr>->0x<ptr>

I don't know how to read these reports, but it seems like the system hangs waiting for this USB(?) component to respond? I've crawled thru my System Information report on Storage devices, TB/USB4, and USB looking for something that matches this UUID(?) to no avail.

Am I correct in assuming that there is a component that hangs on restart that causes this? Or is it a more serious problem? Or am I just totally off base?

FWIW, the computer shuts down normally and reboots though it seems to take a little longer than normal.

Any thoughts appreciated. Thank you.

>>>>>>>

panic(cpu 2 caller 0xffffff801091e44c): Restart timed out in phase 'Notifying power plane drivers'. Total 30000 ms:
vfs_unmountall: 2088 ms
PowerOff/Restart message to priority client: 404 ms @ 0x<ptr>, com.apple.iokit.IOGraphicsFamily(597.0)[29A6CCA1-B3F6-388E-AFED-BFF0E7ECBAD9]@0x<ptr>->0x<ptr>
PowerOff/Restart still waiting on handler: 3003 ms @ 0x<ptr>, com.apple.iokit.IOUSBHostFamily(1.2)[244AE5A7-1B01-3776-9672-39BB0C1071B1]@0x<ptr>->0x<ptr>
PowerOff/Restart handler completed: 5001 ms @ 0x<ptr>, com.apple.iokit.IOUSBHostFamily(1.2)[244AE5A7-1B01-3776-9672-39BB0C1071B1]@0x<ptr>->0x<ptr>
PowerOff/Restart still waiting on handler: 3004 ms @ 0x<ptr>, com.apple.driver.usb.AppleUSBVHCIBCE(1.2)[33BC409A-BEB9-3DF6-A1DB-21D267F685C2]@0x<ptr>->0x<ptr>
PowerOff/Restart handler completed: 5001 ms @ 0x<ptr>, com.apple.driver.usb.AppleUSBVHCIBCE(1.2)[33BC409A-BEB9-3DF6-A1DB-21D267F685C2]@0x<ptr>->0x<ptr>
PowerOff/Restart handler completed: 1129 ms @ 0x<ptr>, com.apple.driver.AppleBCMWLANCoreMac(1.0)[C2481EC0-D6B7-378C-B6E0-528E1D755CDA]@0x<ptr>->0x<ptr>
PowerOff/Restart still waiting on handler: 3873 ms @ 0x<ptr>, com.apple.iokit.IOUSBHostFamily(1.2)[244AE5A7-1B01-3776-9672-39BB0C1071B1]@0x<ptr>->0x<ptr>
PowerOff/Restart handler completed: 5000 ms @ 0x<ptr>, com.apple.iokit.IOUSBHostFamily(1.2)[244AE5A7-1B01-3776-9672-39BB0C1071B1]@0x<ptr>->0x<ptr>
PowerOff/Restart still waiting on handler: 3873 ms @ 0x<ptr>, com.apple.iokit.IOUSBFamily(900.4.2)[76AC42C9-AD5F-36A2-85C3-2E66B82E2C0B]@0x<ptr>->0x<ptr>
PowerOff/Restart still waiting on handler: 3873 ms @ 0x<ptr>, com.apple.iokit.IOUSBFamily(900.4.2)[76AC42C9-AD5F-36A2-85C3-2E66B82E2C0B]@0x<ptr>->0x<ptr>
PowerOff/Restart still waiting on handler: 3873 ms @ 0x<ptr>, com.apple.iokit.IOUSBFamily(900.4.2)[76AC42C9-AD5F-36A2-85C3-2E66B82E2C0B]@0x<ptr>->0x<ptr>
PowerOff/Restart still waiting on handler: 3873 ms @ 0x<ptr>, com.apple.iokit.IOUSBFamily(900.4.2)[76AC42C9-AD5F-36A2-85C3-2E66B82E2C0B]@0x<ptr>->0x<ptr>
PowerOff/Restart still waiting on handler: 3873 ms @ 0x<ptr>, com.apple.iokit.IOUSBFamily(900.4.2)[76AC42C9-AD5F-36A2-85C3-2E66B82E2C0B]@0x<ptr>->0x<ptr>
PowerOff/Restart still waiti @IOPMrootDomain.cpp:5824
Panicked task 0xffffff8b8fe23670: 442 threads: pid 0: kernel_task
Backtrace (CPU 2), panicked thread: 0xffffff86c4fe0000, Frame : Return Address
0xfffffff5999ebaa0 : 0xffffff801007befd
0xfffffff5999ebaf0 : 0xffffff80101deb96
0xfffffff5999ebb30 : 0xffffff80101cdf03
0xfffffff5999ebb80 : 0xffffff801001ba70
0xfffffff5999ebba0 : 0xffffff801007c2cd
0xfffffff5999ebcc0 : 0xffffff801007ba86
0xfffffff5999ebd20 : 0xffffff8010915103
0xfffffff5999ebe10 : 0xffffff801091e44c
0xfffffff5999ebe40 : 0xffffff8010865d0d
0xfffffff5999ebe70 : 0xffffff80100cef75
0xfffffff5999ebee0 : 0xffffff80100d0042
0xfffffff5999ebfa0 : 0xffffff801001b19e

Process name corresponding to current thread (0xffffff86c4fe0000): kernel_task

Mac OS version:
21G651

Kernel version:
Darwin Kernel Version 21.6.0: Thu Jun 8 23:57:12 PDT 2023; root:xnu-8020.240.18.701.6~1/RELEASE_X86_64
Kernel UUID: 0260200C-8B24-3AA3-AC23-7BD6AC6CF3E2
KernelCache slide: 0x000000000fe00000
KernelCache base: 0xffffff8010000000
Kernel slide: 0x000000000fe10000
Kernel text base: 0xffffff8010010000
__HIB text base: 0xffffff800ff00000
System model name: iMacPro1,1 (Mac-7BA5B2D9E42DDD94)
System shutdown begun: YES
Hibernation exit count: 0

System uptime in nanoseconds: 64145035416501
Last Sleep: absolute base_tsc base_nano
Uptime : 0x00003a56ee0cd6d0
Sleep : 0x0000000000000000 0x0000000000000000 0x0000000000000000
Wake : 0x0000000000000000 0x000000221a7c586a 0x0000000000000000
Compressor Info: 0% of compressed pages limit (OK) and 0% of segments limit (OK) with 0 swapfiles and OK swap space
Zone info:
Zone map: 0xffffff80578ae000 - 0xffffffa0578ae000
. PGZ : 0xffffff80578ae000 - 0xffffff805f8af000
. VM : 0xffffff805f8af000 - 0xffffff852b248000
. RO : 0xffffff852b248000 - 0xffffff86c457b000
. GEN0 : 0xffffff86c457b000 - 0xffffff8b8ff14000
. GEN1 : 0xffffff8b8ff14000 - 0xffffff905b8ad000
. GEN2 : 0xffffff905b8ad000 - 0xffffff9527246000
. GEN3 : 0xffffff9527246000 - 0xffffff99f2be0000
. DATA : 0xffffff99f2be0000 - 0xffffffa0578ae000
Metadata: 0xffffffc0b8c4e000 - 0xffffffc0d8c4e000
Bitmaps : 0xffffffc0d8c4e000 - 0xffffffc0f0c4e000

last started kext at 50826247130: @filesystems.msdosfs 1.10 (addr 0xffffff7fa94b1000, size 57344)
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com.waves.driver.soundgrid 14.9.56
com.intel.driver.EnergyDriver 3.7.0
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@filesystems.msdosfs 1.10
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[mikehalloran]

I've not seen a thread on this where anyone has an actual solution. A whole lot of guessing? Oh yea... We can ignore OWC who seems convinced that this only happens with Mac Pros using some of their cards — not possible with an iMac Pro, of course. The earliest mention I've seen is over Mojave. It's rare but not new to Catalina, Big Sur or Monterey as many seem to think.

Update the MacOS to the latest version of Monterey, 12.6.8. Do a Safe Boot when done. See if you still have a problem.

Here are the normal four things to try. They often work. Disconnect all peripherals except your keyboard and mouse and ethernet before doing the following.


A restart timeout always leaves me thinking it's time to reset the launch services. This normally works for that.

Reset Launch Services

1. Open Terminal and run these commands. Copy and paste into Terminal.

2. /System/Library/Frameworks/CoreServices.framework/Frameworks/LaunchServices.framework/Support/lsregister -kill -seed -lint -r -f -v -dump -domain local -domain system -domain user -domain network <Enter or Return key>

3. killall Dock <Enter or Return key>

4. sudo mdutil -E / <Enter or Return key> (enter Admin password when prompted, then <Enter or Return key>

5. Restart your Mac


Other things to try:

Reset NV RAM and SMC

https://www.ifixit.com/Guide/How+to+res ... Pro/113257

and do a Safe Boot

https://support.apple.com/guide/mac-hel ... enu%20bar.

Don't wonder which to try — do them all. If you cannot accomplish one or more of these, that's important to know.

[mikehalloran]

If the above 4 don't get it, boot into the Recovery Partition and reinstall Monterey.

Shut down

Start holding the Command r keys

Reinstall the current MacOS. It might install 12.6.7 since that's what you have—if so, update to 12.6.8 when you are done.

You'll see how once you are in there. You do not want Internet Recovery—that wipes your Mac and reinstalls High Sierra forcing a Time Machine Restore.

[nk_e]

Thanks so much Mike. I'll start on this journey tomorrow.

Your "Launch Services Fix" is my sort of default place that I start when dealing with oddness. It has helped so much in the past. I've also shared it with a friend or two and it has worked miracles for them also.

Thanks again for responding.

[mikehalloran]

Thanks so much Mike. I'll start on this journey tomorrow.

Your "Launch Services Fix" is my sort of default place that I start when dealing with oddness. It has helped so much in the past. I've also shared it with a friend or two and it has worked miracles for them also.

Thanks again for responding.

I've had to share the Rebuild Launch Services fix with Apple Support on more than one occasion.