mac OS Catalina 10.15 – Watchdog Timeout Kernel Panic
In the last few days, when I shutdown my iMac, it takes a long long time, freezes, then restarts with this report – which is always basically the same. I have already reseted PRAM and SMC. If someone could help me out understand what's going on, it would be great.
panic(cpu 1 caller 0xffffff7f837afaae): watchdog timeout: no checkins from watchdogd in 302 seconds (5030 totalcheckins since monitoring last enabled), shutdown in progress
Backtrace (CPU 1), Frame : Return Address
0xffffff82bd8dbc40 : 0xffffff800211868d
0xffffff82bd8dbc90 : 0xffffff8002252ab5
0xffffff82bd8dbcd0 : 0xffffff800224463e
0xffffff82bd8dbd20 : 0xffffff80020bea40
0xffffff82bd8dbd40 : 0xffffff8002117d57
0xffffff82bd8dbe40 : 0xffffff8002118147
0xffffff82bd8dbe90 : 0xffffff80028bf328
0xffffff82bd8dbf00 : 0xffffff7f837afaae
0xffffff82bd8dbf10 : 0xffffff7f837af486
0xffffff82bd8dbf50 : 0xffffff7f837c4d9c
0xffffff82bd8dbfa0 : 0xffffff80020be13e
Kernel Extensions in backtrace:
com.apple.driver.watchdog(1.0)[B6A95892-6C75-3CF5-A6CC-6D83F30FA1D5]@0xffffff7f837ae000->0xffffff7f837b6fff
com.apple.driver.AppleSMC(3.1.9)[D2F0B610-83F8-3B84-B0BD-D9D0CC95A697]@0xffffff7f837b7000->0xffffff7f837d5fff
dependency: com.apple.iokit.IOACPIFamily(1.4)[2956198D-24F2-3790-A9B2-1EAB9434B906]@0xffffff7f837a5000
dependency: com.apple.driver.watchdog(1)[B6A95892-6C75-3CF5-A6CC-6D83F30FA1D5]@0xffffff7f837ae000
dependency: com.apple.iokit.IOPCIFamily(2.9)[2F37AE58-E6B9-3B18-9092-3B80D34C334B]@0xffffff7f82b31000
BSD process name corresponding to current thread: kernel_task
Mac OS version:
19H15
Kernel version:
Darwin Kernel Version 19.6.0: Thu Oct 29 22:56:45 PDT 2020; root:xnu-6153.141.2.2~1/RELEASE_X86_64
Kernel UUID: 9B5A7191-5B84-3990-8710-D9BD9273A8E5
Kernel slide: 0x0000000001e00000
Kernel text base: 0xffffff8002000000
__HIB text base: 0xffffff8001f00000
System model name: iMac14,2 (Mac-27ADBB7B4CEE8E61)
System shutdown begun: YES
Panic diags file available: YES (0x0)
System uptime in nanoseconds: 50625992870163
last loaded kext at 44848782795591: >usb.cdc.acm 5.0.0 (addr 0xffffff7f85fa3000, size 32768)
last unloaded kext at 44911847112129: >!UMergeNub 900.4.2 (addr 0xffffff7f85f77000, size 12288)
loaded kexts:
>!ATopCaseHIDEventDriver 3430.1
>AudioAUUC 1.70
@fileutil 20.036.15
>!APlatformEnabler 2.7.0d0
>AGPM 111.4.4
>X86PlatformShim 1.0.0
>!AMikeyHIDDriver 131
@filesystems.autofs 3.0
>!AMikeyDriver 283.15
>!AHDA 283.15
>!A!IHD5000Graphics 14.0.7
@AGDCPluginDisplayMetrics 5.2.6
>!A!IFramebufferAzul 14.0.7
>!AHV 1
|IOUserEthernet 1.0.1
|IO!BSerialManager 7.0.6f7
>pmtelemetry 1
@Dont_Steal_Mac_OS_X 7.0.0
>!ABacklight 180.3
>!AUpstreamUserClient 3.6.8
>!AMCCSControl 1.14
@GeForce 14.0.0
>eficheck 1
>!ASMCLMU 212
>!AThunderboltIP 3.1.4
>!ALPC 3.1
>!A!ISlowAdaptiveClocking 4.0.0
>!AVirtIO 1.0
@filesystems.hfs.kext 522.100.5
@!AFSCompression.!AFSCompressionTypeDataless 1.0.0d1
@BootCache 40
@!AFSCompression.!AFSCompressionTypeZlib 1.0.0
@filesystems.apfs 1412.141.1
@private.KextAudit 1.0
>!ASDXC 1.7.7
>AirPort.BrcmNIC 1400.1.1
|!ABCM5701Ethernet 10.3.5
>!AAHCIPort 341.140.1
>!ARTC 2.0
>!AACPIButtons 6.1
>!AHPET 1.8
>!ASMBIOS 2.1
>!AACPIEC 6.1
>!AAPIC 1.7
$!AImage4 1
@nke.applicationfirewall 303
$TMSafetyNet 8
@!ASystemPolicy 2.0.0
|EndpointSecurity 1
>usb.cdc.ncm 5.0.0
>usb.cdc 5.0.0
>!A!BHIDKeyboard 209
>!AHIDKeyboard 209
>!AMultitouchDriver 3440.1
>!AInputDeviceSupport 3440.8
>!AHS!BDriver 3430.1
>IO!BHIDDriver 7.0.6f7
@kext.triggers 1.0
>DspFuncLib 283.15
@kext.OSvKernDSPLib 529
|IOAVB!F 850.1
>!ABacklightExpert 1.1.0
>!ASMBus!C 1.0.18d1
|IOAccelerator!F2 438.7.3
>!ASMBusPCI 1.0.14d1
@nvidia.driver.NVDAGK100Hal 14.0.0
@nvidia.driver.NVDAResman 14.0.0
>!AThunderboltEDMSink 4.2.3
>X86PlatformPlugin 1.0.0
>IOPlatformPlugin!F 6.0.0d8
@!AGPUWrangler 5.2.6
@!AGraphicsDeviceControl 5.2.6
|IOSlowAdaptiveClocking!F 1.0.0
>!AHDA!C 283.15
|IOHDA!F 283.15
|IONDRVSupport 576.1
|IOGraphics!F 576.1
@plugin.IOgPTPPlugin 840.3
|Broadcom!BHost!CUSBTransport 7.0.6f7
|IO!BHost!CUSBTransport 7.0.6f7
|IO!BHost!CTransport 7.0.6f7
|IO!B!F 7.0.6f7
|IO!BPacketLogger 7.0.6f7
>usb.!UHub 1.2
>usb.networking 5.0.0
>usb.!UHostCompositeDevice 1.2
|IOAudio!F 300.2
@vecLib.kext 1.2.0
|IOSerial!F 11
@filesystems.hfs.encodings.kext 1
|IOSurface 269.11
>!AThunderboltDPOutAdapter 6.2.6
>!AThunderboltDPInAdapter 6.2.6
>!AThunderboltDPAdapter!F 6.2.6
>!AThunderboltPCIDownAdapter 2.5.4
|IOAHCIBlock!S 316.100.5
>!AThunderboltNHI 5.8.6
|IOThunderbolt!F 7.6.1
|IO80211!F 1200.12.2b1
>corecapture 1.0.4
|IOSkywalk!F 1
|IOUSB!F 900.4.2
|IOEthernetAVB!C 1.1.0
>mDNSOffloadUserClient 1.0.1b8
>usb.!UXHCIPCI 1.2
>usb.!UXHCI 1.2
|IOAHCI!F 290.0.1
>!AEFINVRAM 2.1
>!AEFIRuntime 2.1
|IOSMBus!F 1.1
|IOHID!F 2.0.0
$quarantine 4
$sandbox 300.0
@kext.!AMatch 1.0.0d1
>DiskImages 493.0.0
>!AFDEKeyStore 28.30
>!AEffaceable!S 1.0
>!ASSE 1.0
>!AKeyStore 2
>!UTDM 489.120.1
|IOSCSIBlockCommandsDevice 422.120.3
>!ACredentialManager 1.0
>KernelRelayHost 1
>!ASEPManager 1.0.1
>IOSlaveProcessor 1
|IOUSBMass!SDriver 157.140.1
|IOSCSIArchitectureModel!F 422.120.3
|IO!S!F 2.1
|IOUSBHost!F 1.2
>!UHostMergeProperties 1.2
>usb.!UCommon 1.0
>!ABusPower!C 1.0
|CoreAnalytics!F 1
>!AMobileFileIntegrity 1.0.5
@kext.CoreTrust 1
|IOTimeSync!F 840.3
|IONetworking!F 3.4
|IOReport!F 47
>!AACPIPlatform 6.1
>!ASMC 3.1.9
>watchdog 1
|IOPCI!F 2.9
|IOACPI!F 1.4
@kec.pthread 1
@kec.Libm 1
@kec.corecrypto 1.0
Solution 1:
My personal experience of a similar issue on Big Sur (Intel) lead me to the external monitor.
I now have to disconnect the external monitor before shutdown. I would suggest that you try the same and also with any other devices you have connected.
I also had a similar issue with Catalina as well which was related to the external monitor's audio driver and my bluetooth headset. which caused issues with shutdowns and sleep mode often leading to Kernel panic reports when I booted up the following day.
It is most likely a software bug, however, can begotten around physisically.