panic(cpu 2 caller 0xffffff7f9ad9dad5): userspace watchdog timeout: no successful checkins from com.apple.WindowServer in 120 seconds
service: com.apple.logd, total successful checkins since load (6760 seconds ago): 677, last successful checkin: 0 seconds ago
service: com.apple.WindowServer, total successful checkins since load (6730 seconds ago): 657, last successful checkin: 120 seconds ago

Backtrace (CPU 2), Frame : Return Address
0xffffff8e1e683820 : 0xffffff801a33bb1b 
0xffffff8e1e683870 : 0xffffff801a4733e5 
0xffffff8e1e6838b0 : 0xffffff801a464e5e 
0xffffff8e1e683900 : 0xffffff801a2e2a40 
0xffffff8e1e683920 : 0xffffff801a33b207 
0xffffff8e1e683a20 : 0xffffff801a33b5eb 
0xffffff8e1e683a70 : 0xffffff801aad2575 
0xffffff8e1e683ae0 : 0xffffff7f9ad9dad5 
0xffffff8e1e683af0 : 0xffffff7f9ad9d7e6 
0xffffff8e1e683b10 : 0xffffff801aa66fcb 
0xffffff8e1e683b60 : 0xffffff801aa70083 
0xffffff8e1e683ca0 : 0xffffff801a422c22 
0xffffff8e1e683db0 : 0xffffff801a341998 
0xffffff8e1e683e10 : 0xffffff801a318625 
0xffffff8e1e683e70 : 0xffffff801a32f0d5 
0xffffff8e1e683f00 : 0xffffff801a44b485 
0xffffff8e1e683fa0 : 0xffffff801a2e3226 
      Kernel Extensions in backtrace:
         com.apple.driver.watchdog(1.0)[EFAA17B9-A62C-30B7-9602-0BB5282EDDD6]@0xffffff7f9ad9c000->0xffffff7f9ada4fff

BSD process name corresponding to current thread: watchdogd
Boot args: chunklist-security-epoch=0 -chunklist-no-rev2-dev

Mac OS version:
19C57

Kernel version:
Darwin Kernel Version 19.2.0: Sat Nov  9 03:47:04 PST 2019; root:xnu-6153.61.1~20/RELEASE_X86_64
Kernel UUID: C3E7E405-C692-356B-88D3-C30041FD1E72
Kernel slide:     0x000000001a000000
Kernel text base: 0xffffff801a200000
__HIB  text base: 0xffffff801a100000
System model name: iMacPro1,1 (Mac-7BA5B2D9E42DDD94)
System shutdown begun: NO

System uptime in nanoseconds: 6769252543639
last loaded kext at 731983345021: @filesystems.smbfs	3.4 (addr 0xffffff7f9f7ee000, size 446464)
last unloaded kext at 204508723045: >usb.!UHostPacketFilter	1.0 (addr 0xffffff7f9cbe9000, size 24576)
loaded kexts:
com.getdropbox.dropbox.kext	1.10.3
@filesystems.smbfs	3.4
>!AUpstreamUserClient	3.6.8
@kext.AMDFramebuffer	3.0.4
@kext.AMDRadeonX5000	3.0.4
@kext.AMDRadeonServiceManager	3.0.4
>!AGraphicsDevicePolicy	4.5.21
@fileutil	20.036.15
@AGDCPluginDisplayMetrics	4.5.21
>!AHV	1
|IOUserEthernet	1.0.1
|IO!BSerialManager	7.0.2f4
>AGPM	111.4.1
>!APlatformEnabler	2.7.0d0
>X86PlatformShim	1.0.0
>pmtelemetry	1
>AudioAUUC	1.70
@Dont_Steal_Mac_OS_X	7.0.0
>BridgeAudioCommunication	6.60
@kext.AMD10000!C	3.0.4
>!AThunderboltIP	3.1.3
>!AHIDALSService	1
>!AGFXHDA	100.1.422
>!AMCCSControl	1.13
>!AAVEBridge	6.1
>!A!ISlowAdaptiveClocking	4.0.0
>!ABridgeAudio!C	6.60
>!A!IPCHPMC	2.0.1
>!A!IMCEReporter	115
@filesystems.autofs	3.0
>!ATopCaseHIDEventDriver	3420.1
>!UTopCaseDriver	3420.1
>!UCardReader	489.60.3
>BCMWLANFirmware4355.Hashstore	1
>BCMWLANFirmware4364.Hashstore	1
>BCMWLANFirmware4377.Hashstore	1
@filesystems.apfs	1412.61.1
@filesystems.hfs.kext	522.0.9
@BootCache	40
@!AFSCompression.!AFSCompressionTypeDataless	1.0.0d1
@!AFSCompression.!AFSCompressionTypeZlib	1.0.0
>!AVirtIO	1.0
>!ABCMWLANBusInterfacePCIe	1
@private.KextAudit	1.0
>!AACPIButtons	6.1
>!ASMBIOS	2.1
>!AACPIEC	6.1
>!AAPIC	1.7
$!AImage4	1
@nke.applicationfirewall	303
$TMSafetyNet	8
@!ASystemPolicy	2.0.0
|EndpointSecurity	1
@kext.AMDRadeonX5100HWLibs	1.0
|IOAccelerator!F2	438.2.8
@kext.AMDRadeonX5000HWServices	3.0.4
|IOAVB!F	800.17
>!ASSE	1.0
@!AGPUWrangler	4.5.21
|IO!BHost!CUARTTransport	7.0.2f4
|IO!BHost!CTransport	7.0.2f4
>!A!ILpssUARTv1	3.0.60
>!A!ILpssUARTCommon	3.0.60
>!AOnboardSerial	1.0
>!UAudio	320.49
|IONDRVSupport	569.3
>X86PlatformPlugin	1.0.0
>!ASMBus!C	1.0.18d1
|IOSlowAdaptiveClocking!F	1.0.0
>!AGraphicsControl	4.5.21
@plugin.IOgPTPPlugin	800.14
|IOEthernetAVB!C	1.1.0
>IOPlatformPlugin!F	6.0.0d8
@kext.AMDSupport	3.0.4
@!AGraphicsDeviceControl	4.5.21
|IOGraphics!F	569.3
@kext.triggers	1.0
>!AHS!BDriver	3420.1
>IO!BHIDDriver	7.0.2f4
>!AHIDKeyboard	209
>!AMultitouchDriver	3420.2
>!AInputDeviceSupport	3420.4
>usb.IOUSBHostHIDDevice	1.2
>usb.cdc.ncm	5.0.0
>usb.!UHub	1.2
>usb.cdc	5.0.0
>usb.networking	5.0.0
>usb.!UHostCompositeDevice	1.2
>usb.!UVHCIBCE	1.2
>usb.!UVHCI	1.2
>usb.!UVHCICommonBCE	1.0
>usb.!UVHCICommon	1.0
>!AEffaceableNOR	1.0
|IOSurface	269.6
@filesystems.hfs.encodings.kext	1
|IOBufferCopy!C	1.1.0
|IOBufferCopyEngine!F	1
|IONVMe!F	2.1.0
|IOAudio!F	300.2
@vecLib.kext	1.2.0
>!ABCMWLANCore	1.0.0
>IOImageLoader	1.0.0
|IOSerial!F	11
|IO80211!FV2	1200.12.2b1
>corecapture	1.0.4
|IOSkywalk!F	1
>!AThunderboltDPInAdapter	6.2.4
>!AThunderboltDPAdapter!F	6.2.4
>!AThunderboltPCIDownAdapter	2.5.2
>!AHPM	3.4.4
>!A!ILpssI2C!C	3.0.60
>!A!ILpssDmac	3.0.60
>!A!ILpssI2C	3.0.60
>!AThunderboltNHI	5.8.1
|IOThunderbolt!F	7.4.7
|IOUSB!F	900.4.2
>!AEthernetAquantiaAqtion	1.0.64
>mDNSOffloadUserClient	1.0.1b8
>usb.!UXHCIPCI	1.2
>usb.!UXHCI	1.2
>!AEFINVRAM	2.1
>!AEFIRuntime	2.1
>!ASMCRTC	1.0
|IOSMBus!F	1.1
|IOHID!F	2.0.0
$quarantine	4
$sandbox	300.0
@kext.!AMatch	1.0.0d1
>!AKeyStore	2
>!UTDM	489.60.3
|IOSCSIBlockCommandsDevice	422.0.2
>!ACredentialManager	1.0
>KernelRelayHost	1
>!ASEPManager	1.0.1
>IOSlaveProcessor	1
>!AFDEKeyStore	28.30
>!AEffaceable!S	1.0
>!AMobileFileIntegrity	1.0.5
@kext.CoreTrust	1
|CoreAnalytics!F	1
|IOTimeSync!F	800.14
|IONetworking!F	3.4
>DiskImages	493.0.0
|IO!B!F	7.0.2f4
|IO!BPacketLogger	7.0.2f4
|IOUSBMass!SDriver	157.40.7
|IOSCSIArchitectureModel!F	422.0.2
|IO!S!F	2.1
|IOUSBHost!F	1.2
>usb.!UCommon	1.0
>!UHostMergeProperties	1.2
>!ABusPower!C	1.0
|IOReport!F	47
>!AACPIPlatform	6.1
>!ASMC	3.1.9
>watchdog	1
|IOPCI!F	2.9
|IOACPI!F	1.4
@kec.pthread	1
@kec.corecrypto	1.0
@kec.Libm	1