Big Sur Mac Crash 4 times in the last 6 hours - 2 no-report and 2 reports

This sounds exactly like my scenario, except on a iMac Retina 5k 4-core i7. Literally *nothing* else open on the system except the time machine backup was in progress.

panic(cpu 4 caller 0xffffff801af53a13): userspace watchdog timeout: no successful checkins from com.apple.WindowServer in 120 seconds
service: com.apple.logd, total successful checkins since wake (2450 seconds ago): 246, last successful checkin: 0 seconds ago
service: com.apple.WindowServer, total successful checkins since wake (2450 seconds ago): 226, last successful checkin: 120 seconds ago

Backtrace (CPU 4), Frame : Return Address
0xffffffc122aa3670 : 0xffffff8017cbc66d
0xffffffc122aa36c0 : 0xffffff8017dff073
0xffffffc122aa3700 : 0xffffff8017def6aa
0xffffffc122aa3750 : 0xffffff8017c61a2f
0xffffffc122aa3770 : 0xffffff8017cbbf0d
0xffffffc122aa3890 : 0xffffff8017cbc1f8
0xffffffc122aa3900 : 0xffffff80184bee84
0xffffffc122aa3970 : 0xffffff801af53a13
0xffffffc122aa3980 : 0xffffff801af536ba
0xffffffc122aa39a0 : 0xffffff80184460ee
0xffffffc122aa39f0 : 0xffffff801af52b0a
0xffffffc122aa3b20 : 0xffffff80184502bb
0xffffffc122aa3c80 : 0xffffff8017daaa61
0xffffffc122aa3d90 : 0xffffff8017cc1d77
0xffffffc122aa3e00 : 0xffffff8017c985d5
0xffffffc122aa3e60 : 0xffffff8017cafb82
0xffffffc122aa3ef0 : 0xffffff8017dd3823
0xffffffc122aa3fa0 : 0xffffff8017c62216
Kernel Extensions in backtrace:
com.apple.driver.watchdog(1.0)[7948A279-A8B8-3650-AFBF-B1E3EB68942A]@0xffffff801af52000->0xffffff801af53fff

Process name corresponding to current thread: watchdogd

Mac OS version:
20B29

Kernel version:
Darwin Kernel Version 20.1.0: Sat Oct 31 00:07:11 PDT 2020; root:xnu-7195.50.7~2/RELEASEX8664
Kernel UUID: 84C6DC45-6B02-335F-9439-5D2A9BC385A4
KernelCache slide: 0x0000000017a00000
KernelCache base: 0xffffff8017c00000
Kernel slide: 0x0000000017a10000
Kernel text base: 0xffffff8017c10000
_HIB text base: 0xffffff8017b00000
System model name: iMac17,1 (Mac-DB15BD556843C820)
System shutdown begun: NO
Panic diags file available: YES (0x0)
Hibernation exit count: 0

System uptime in nanoseconds: 3358413001062
Last Sleep: absolute basetsc base_nano
Uptime : 0x0000030df10394b8
Sleep : 0x000000d04ffdecad 0x000000008a916b60 0x000000c1ec725d0c
Wake : 0x000000d0578da6d1 0x000000008b097b9a 0x000000d05679b0f8
last started kext at 3243326094155: >usb.!UUserHCI 1 (addr 0xffffff7fb77ef000, size 98304)
last stopped kext at 3304242613422: >usb.!UUserHCI 1 (addr 0xffffff7fb77ef000, size 98304)
loaded kexts:
@filesystems.smbfs 3.4.1
@fileutil 20.036.15
@filesystems.autofs 3.0

AudioAUUC 1.70
X86PlatformShim 1.0.0
AGPM 119
!APlatformEnabler 2.7.0d0
!AUpstreamUserClient 3.6.8
@kext.AMDFramebuffer 4.0.0
!AMikeyHIDDriver 131
@kext.AMDRadeonX4000 4.0.0
!AMikeyDriver 283.15
@kext.AMDRadeonServiceManager 4.0.0
!AHDA 283.15
!A!ISKLGraphics 16.0.0
!AGraphicsDevicePolicy 6.1.27
!A!IPCHPMC 2.0.1
@AGDCPluginDisplayMetrics 6.1.27
!A!ISKLGraphicsFramebuffer 16.0.0
pmtelemetry 1
LuaHardwareAccess 1.0.16
|IOUserEthernet 1.0.1
|IO!BSerialManager 8.0.1f5
@DontStealMacOSX 7.0.0
!AHV 1
!ADiskImages2 1
@kext.AMD7000!C 4.0.0
eficheck 1
!ASMCLMU 212
|Broadcom!B20703USBTransport 8.0.1f5
!AThunderboltIP 4.0.3
!AMCCSControl 1.14
!A!ISlowAdaptiveClocking 4.0.0
!ATopCaseHIDEventDriver 4000.27
!UTopCaseDriver 4000.27
@filesystems.tmpfs 1
@filesystems.hfs.kext 556.41.1
@BootCache 40
@!AFSCompression.!AFSCompressionTypeZlib 1.0.0
@!AFSCompression.!AFSCompressionTypeDataless 1.0.0d1
@filesystems.apfs 1677.50.1
!ASDXC 1.9.0
|!ABCM5701Ethernet 11.0.0
AirPort.BrcmNIC 1400.1.1
!AAHCIPort 346
@private.KextAudit 1.0
!AACPIButtons 6.1
!ARTC 2.0
!ASMBIOS 2.1
!AACPIEC 6.1
!AAPIC 1.7
@!ASystemPolicy 2.0.0
@nke.applicationfirewall 310
|IOKitRegistryCompatibility 1
|EndpointSecurity 1
@kext.triggers 1.0
@kext.AMDRadeonX4030HWLibs 1.0
@kext.AMDRadeonX4000HWServices 4.0.0
DspFuncLib 283.15
@kext.OSvKernDSPLib 529
!AGraphicsControl 6.1.27
!ASMBusPCI 1.0.14d1
|IOAccelerator!F2 439.35.4
|IOSerial!F 11
|IOAVB!F 900.12
@plugin.IOgPTPPlugin 900.11
|IOEthernetAVB!C 1.1.0
!AHDA!C 283.15
|IOHDA!F 283.15
|IOAudio!F 300.6.1
@vecLib.kext 1.2.0
@kext.AMDSupport 4.0.0
|Broadcom!BHost!CUSBTransport 8.0.1f5
|IO!BHost!CUSBTransport 8.0.1f5
|IO!BHost!CTransport 8.0.1f5
@!AGPUWrangler 6.1.27
@!AGraphicsDeviceControl 6.1.27
!AThunderboltEDMSink 5.0.3
|IONDRVSupport 585
|IOGraphics!F 585
!ASMBus!C 1.0.18d1
X86PlatformPlugin 1.0.0
IOPlatformPlugin!F 6.0.0d8
|IOSlowAdaptiveClocking!F 1.0.0
!AHS!BDriver 4000.27
IO!BHIDDriver 8.0.1f5
!AMultitouchDriver 4400.28
!AInputDeviceSupport 4400.35
!AHIDKeyboard 222
usb.IOUSBHostHIDDevice 1.2
usb.networking 5.0.0
usb.!UHostCompositeDevice 1.2
!AThunderboltDPOutAdapter 8.1.4
!AThunderboltDPInAdapter 8.1.4
!AThunderboltDPAdapter!F 8.1.4
!AThunderboltPCIDownAdapter 4.1.1
!ABSDKextStarter 3
|IOSurface 289.3
@filesystems.hfs.encodings.kext 1
|IOAHCIBlock!S 332
!AThunderboltNHI 7.2.8
|IOThunderbolt!F 9.3.2
|IONVMe!F 2.1.0
|IO80211!F 1200.12.2b1
|IOSkywalk!F 1
mDNSOffloadUserClient 1.0.1b8
corecapture 1.0.4
|IOUSB!F 900.4.2
|IOAHCI!F 294
usb.!UXHCIPCI 1.2
usb.!UXHCI 1.2
!AEFINVRAM 2.1
!AEFIRuntime 2.1
|IOSMBus!F 1.1
|IOHID!F 2.0.0
$!AImage4 3.0.0
|IOTimeSync!F 900.11
|IONetworking!F 3.4
DiskImages 493.0.0
|IO!B!F 8.0.1f5
|IOReport!F 47
|IO!BPacketLogger 8.0.1f5
$quarantine 4
$sandbox 300.0
@kext.!AMatch 1.0.0d1
|CoreAnalytics!F 1
!ASSE 1.0
!AKeyStore 2
!UTDM 511.40.9
|IOUSBMass!SDriver 184.40.6
|IOSCSIBlockCommandsDevice 436.40.6
|IO!S!F 2.1
|IOSCSIArchitectureModel!F 436.40.6
!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 1.0
@kec.Libm 1

i have one week the same issue :

panic(cpu 2 caller 0xffffff800ed68a25): userspace watchdog timeout: no successful checkins from com.apple.logd in 120 seconds

service returned not alive with context : unresponsive dispatch queue(s): com.apple.firehose.io-wl 

service: com.apple.logd, total successful checkins since wake (210 seconds ago): 10, last successful checkin: 120 seconds ago

service: com.apple.WindowServer, total successful checkins since wake (210 seconds ago): 12, last successful checkin: 100 seconds ago



Backtrace (CPU 2), Frame : Return Address

0xffffffb0b3533670 : 0xffffff800bab38fd 

0xffffffb0b35336c0 : 0xffffff800bbf64e3 

0xffffffb0b3533700 : 0xffffff800bbe6b1a 

0xffffffb0b3533750 : 0xffffff800ba58a2f 

0xffffffb0b3533770 : 0xffffff800bab319d 

0xffffffb0b3533890 : 0xffffff800bab3488 

0xffffffb0b3533900 : 0xffffff800c2b7cf4 

0xffffffb0b3533970 : 0xffffff800ed68a25 

0xffffffb0b3533980 : 0xffffff800ed68678 

0xffffffb0b35339a0 : 0xffffff800c23ef8e 

0xffffffb0b35339f0 : 0xffffff800ed67ab4 

0xffffffb0b3533b20 : 0xffffff800c24915b 

0xffffffb0b3533c80 : 0xffffff800bba1b81 

0xffffffb0b3533d90 : 0xffffff800bab8ef7 

0xffffffb0b3533e00 : 0xffffff800ba8f705 

0xffffffb0b3533e60 : 0xffffff800baa6e12 

0xffffffb0b3533ef0 : 0xffffff800bbcacc3 

0xffffffb0b3533fa0 : 0xffffff800ba59216 

      Kernel Extensions in backtrace:

         com.apple.driver.watchdog(1.0)[C1A64FD7-AD16-37E0-8FA1-A78A8E91D9FF]@0xffffff800ed67000->0xffffff800ed68fff



Process name corresponding to current thread: watchdogd



Mac OS version:

20C5048k



Kernel version:

Darwin Kernel Version 20.2.0: Tue Nov 10 21:14:14 PST 2020; root:xnu-7195.60.70.111.1~1/RELEASEX8664

Kernel UUID: 1C1D9321-73E9-3B05-AD5D-926E3B0E53AB

KernelCache slide: 0x000000000b800000

KernelCache base:  0xffffff800ba00000

Kernel slide:      0x000000000b810000

Kernel text base:  0xffffff800ba10000

_HIB  text base: 0xffffff800b900000

System model name: iMac15,1 (Mac-FA842E06C61E91C5)

System shutdown begun: NO

Panic diags file available: YES (0x0)

Hibernation exit count: 0



System uptime in nanoseconds: 10136556899103

Last Sleep:           absolute           basetsc          basenano

  Uptime  : 0x0000093819df8eb6

  Sleep   : 0x00000904e38c0c8c 0x000000006209f2bc 0x00000521ab86d5d9

  Wake    : 0x00000904eabd54eb 0x000000006223083c 0x00000904e9c6b8c3

last started kext at 5642570235310: >!UAudio 401.4 (addr 0xffffff7fabf0f000, size 307200)

last stopped kext at 1944225107613: >usb.!UUserHCI 1 (addr 0xffffff7fac39d000, size 98304)

loaded kexts:

com.parallels.kext.netbridge 16.1.0 48950

com.parallels.kext.usbconnect 16.1.0 48950

com.parallels.kext.hypervisor 16.1.0 48950

com.parallels.kext.vnic 16.1.0 48950

com.paragon-software.filesystems.ntfs 106.5.15

com.intel.driver.EnergyDriver 2.0

@filesystems.afpfs 11.3

@nke.asptcp 8.2

usb.!UUserHCI 1

@filesystems.smbfs 3.4.1

!A!BMultitouch 99

AudioAUUC 1.70

@fileutil 20.036.15

!APlatformEnabler 2.7.0d0

AGPM 119

X86PlatformShim 1.0.0

@filesystems.autofs 3.0

!AUpstreamUserClient 3.6.8

@kext.AMDFramebuffer 4.0.2

!AMikeyHIDDriver 131

@kext.AMDRadeonX4000 4.0.2

@kext.AMDRadeonServiceManager 4.0.2

!AHDA 283.15

!AGraphicsDevicePolicy 6.2.2

@AGDCPluginDisplayMetrics 6.2.2

pmtelemetry 1

LuaHardwareAccess 1.0.16

|IOUserEthernet 1.0.1

|IO!BSerialManager 8.0.2f2

!A!IHD5000Graphics 16.0.1

@DontStealMacOSX 7.0.0

!AHV 1

!AThunderboltIP 4.0.3

!AMikeyDriver 283.15

eficheck 1

!ADiskImages2 1

!ALPC 3.1

!ASMCLMU 212

!A!IFramebufferAzul 16.0.1

@kext.AMD9000!C 4.0.2

!AMCCSControl 1.14

!A!ISlowAdaptiveClocking 4.0.0

!ATopCaseHIDEventDriver 4020.6

!UTopCaseDriver 4020.6

@filesystems.tmpfs 1

@filesystems.hfs.kext 556.60.1

@BootCache 40

@!AFSCompression.!AFSCompressionTypeZlib 1.0.0

@!AFSCompression.!AFSCompressionTypeDataless 1.0.0d1

@filesystems.apfs 1677.60.22

!ASDXC 1.9.0

|!ABCM5701Ethernet 11.0.0

AirPort.BrcmNIC 1400.1.1

@private.KextAudit 1.0

!AAHCIPort 346

!ARTC 2.0

!AACPIButtons 6.1

!AHPET 1.8

!ASMBIOS 2.1

!AACPIEC 6.1

!AAPIC 1.7

@!ASystemPolicy 2.0.0

@nke.applicationfirewall 310

|IOKitRegistryCompatibility 1

|EndpointSecurity 1

!UAudio 401.4

usb.cdc 5.0.0

$SecureRemotePassword 1.0

@plugin.IOAVBDiscoveryPlugin 900.12

@kext.triggers 1.0

@kext.AMDRadeonX4070HWLibs 1.0

@kext.AMDRadeonX4000HWServices 4.0.2

DspFuncLib 283.15

@kext.OSvKernDSPLib 529

!AGraphicsControl 6.2.2

|IOSerial!F 11

|IOAVB!F 900.12

!AThunderboltEDMSink 5.0.3

|IONDRVSupport 585

!AHDA!C 283.15

|IOHDA!F 283.15

|IOAudio!F 300.6.1

@vecLib.kext 1.2.0

!ASMBusPCI 1.0.14d1

|IOAccelerator!F2 439.52

@plugin.IOgPTPPlugin 900.11

|IOEthernetAVB!C 1.1.0

@kext.AMDSupport 4.0.2

!ASMBus!C 1.0.18d1

X86PlatformPlugin 1.0.0

IOPlatformPlugin!F 6.0.0d8

@!AGPUWrangler 6.2.2

@!AGraphicsDeviceControl 6.2.2

|IOGraphics!F 585

|IOSlowAdaptiveClocking!F 1.0.0

|Broadcom!BHost!CUSBTransport 8.0.2f2

|IO!BHost!CUSBTransport 8.0.2f2

|IO!BHost!CTransport 8.0.2f2

!AHS!BDriver 4020.6

IO!BHIDDriver 8.0.2f2

usb.IOUSBHostHIDDevice 1.2

!AMultitouchDriver 4400.28

!AInputDeviceSupport 4400.35

!AHIDKeyboard 222

usb.networking 5.0.0

usb.!UHostCompositeDevice 1.2

usb.!UHub 1.2

!AThunderboltDPOutAdapter 8.1.4

!AThunderboltDPInAdapter 8.1.4

!AThunderboltDPAdapter!F 8.1.4

!AThunderboltPCIDownAdapter 4.1.1

!ABSDKextStarter 3

|IOSurface 289.3

@filesystems.hfs.encodings.kext 1

|IOAHCIBlock!S 332

!AThunderboltNHI 7.2.8

|IOThunderbolt!F 9.3.2

|IOUSB!F 900.4.2

|IO80211!F 1200.12.2b1

|IOSkywalk!F 1

mDNSOffloadUserClient 1.0.1b8

corecapture 1.0.4

|IOAHCI!F 294

usb.!UXHCIPCI 1.2

usb.!UXHCI 1.2

!AEFINVRAM 2.1

!AEFIRuntime 2.1

|IOSMBus!F 1.1

|IOHID!F 2.0.0

$!AImage4 3.0.0

|IOTimeSync!F 900.11

|IONetworking!F 3.4

DiskImages 493.0.0

|IO!B!F 8.0.2f2

|IOReport!F 47

|IO!BPacketLogger 8.0.2f2

$quarantine 4

$sandbox 300.0

@kext.!AMatch 1.0.0d1

|CoreAnalytics!F 1

!ASSE 1.0

!AKeyStore 2

!UTDM 511.60.2

|IOUSBMass!SDriver 184.40.6

|IOSCSIBlockCommandsDevice 436.40.6

|IO!S!F 2.1

|IOSCSIArchitectureModel!F 436.40.6

!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 1.0

@kec.Libm 1

same here:

panic(cpu 2 caller 0xffffff801dd53a13): userspace watchdog timeout: no successful checkins from com.apple.WindowServer in 120 seconds
service: com.apple.logd, total successful checkins since load (7130 seconds ago): 714, last successful checkin: 0 seconds ago
service: com.apple.WindowServer, total successful checkins since load (7100 seconds ago): 698, last successful checkin: 120 seconds ago
service: com.apple.remoted, total successful checkins since load (7130 seconds ago): 712, last successful checkin: 0 seconds ago

Backtrace (CPU 2), Frame : Return Address
0xffffffc11bbeb670 : 0xffffff801aabc66d
0xffffffc11bbeb6c0 : 0xffffff801abff073
0xffffffc11bbeb700 : 0xffffff801abef6aa
0xffffffc11bbeb750 : 0xffffff801aa61a2f
0xffffffc11bbeb770 : 0xffffff801aabbf0d
0xffffffc11bbeb890 : 0xffffff801aabc1f8
0xffffffc11bbeb900 : 0xffffff801b2bee84
0xffffffc11bbeb970 : 0xffffff801dd53a13
0xffffffc11bbeb980 : 0xffffff801dd536ba
0xffffffc11bbeb9a0 : 0xffffff801b2460ee
0xffffffc11bbeb9f0 : 0xffffff801dd52b0a
0xffffffc11bbebb20 : 0xffffff801b2502bb
0xffffffc11bbebc80 : 0xffffff801abaaa61
0xffffffc11bbebd90 : 0xffffff801aac1d77
0xffffffc11bbebe00 : 0xffffff801aa985d5
0xffffffc11bbebe60 : 0xffffff801aaafb82
0xffffffc11bbebef0 : 0xffffff801abd3823
0xffffffc11bbebfa0 : 0xffffff801aa62216
Kernel Extensions in backtrace:
com.apple.driver.watchdog(1.0)[7948A279-A8B8-3650-AFBF-B1E3EB68942A]@0xffffff801dd52000->0xffffff801dd53fff

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

Mac OS version:
20B50

Kernel version:
Darwin Kernel Version 20.1.0: Sat Oct 31 00:07:11 PDT 2020; root:xnu-7195.50.7~2/RELEASEX8664
Kernel UUID: 84C6DC45-6B02-335F-9439-5D2A9BC385A4
KernelCache slide: 0x000000001a800000
KernelCache base: 0xffffff801aa00000
Kernel slide: 0x000000001a810000
Kernel text base: 0xffffff801aa10000
__HIB text base: 0xffffff801a900000
System model name: iMacPro1,1 (Mac-7BA5B2D9E42DDD94)
System shutdown begun: NO
Hibernation exit count: 0

2 More crashes today Apple. Help would be nice:
panic(cpu 2 caller 0xffffff801e353a13): userspace watchdog timeout: no successful checkins from com.apple.logd in 120 seconds
service returned not alive with context : unresponsive dispatch queue(s): com.apple.firehose.io-wl
service: com.apple.logd, total successful checkins since wake (27940 seconds ago): 2782, last successful checkin: 120 seconds ago
service: com.apple.WindowServer, total successful checkins since wake (27940 seconds ago): 2788, last successful checkin: 70 seconds ago

Backtrace (CPU 2), Frame : Return Address
0xffffffc132e0b670 : 0xffffff801b0bc66d
0xffffffc132e0b6c0 : 0xffffff801b1ff073
0xffffffc132e0b700 : 0xffffff801b1ef6aa
0xffffffc132e0b750 : 0xffffff801b061a2f
0xffffffc132e0b770 : 0xffffff801b0bbf0d
0xffffffc132e0b890 : 0xffffff801b0bc1f8
0xffffffc132e0b900 : 0xffffff801b8bee84
0xffffffc132e0b970 : 0xffffff801e353a13
0xffffffc132e0b980 : 0xffffff801e3536ba
0xffffffc132e0b9a0 : 0xffffff801b8460ee
0xffffffc132e0b9f0 : 0xffffff801e352b0a
0xffffffc132e0bb20 : 0xffffff801b8502bb
0xffffffc132e0bc80 : 0xffffff801b1aaa61
0xffffffc132e0bd90 : 0xffffff801b0c1d77
0xffffffc132e0be00 : 0xffffff801b0985d5
0xffffffc132e0be60 : 0xffffff801b0afb82
0xffffffc132e0bef0 : 0xffffff801b1d3823
0xffffffc132e0bfa0 : 0xffffff801b062216
Kernel Extensions in backtrace:
com.apple.driver.watchdog(1.0)[7948A279-A8B8-3650-AFBF-B1E3EB68942A]@0xffffff801e352000->0xffffff801e353fff

My iMac Retina 5K, 27-inch, 2017 also crashes after installing Big Sur 11.0.1 (20B50).
Havn't used the computer much but it crashes on wake after sleep.

Log:
panic(cpu 0 caller 0xffffff8002c3a05a): "UPSB(iMac18,3): thunderbolt power on failed 0xffffffff\n"@/AppleInternal/BuildRoot/Library/Caches/com.apple.xbs/Sources/IOPCIFamily/IOPCIFamily-428.40.7/IOPCIBridge.cpp:1428
Backtrace (CPU 0), Frame : Return Address
0xffffffa05856b9e0 : 0xffffff80002bc66d
0xffffffa05856ba30 : 0xffffff80003ff073
0xffffffa05856ba70 : 0xffffff80003ef6aa
0xffffffa05856bac0 : 0xffffff8000261a2f
0xffffffa05856bae0 : 0xffffff80002bbf0d
0xffffffa05856bc00 : 0xffffff80002bc1f8
0xffffffa05856bc70 : 0xffffff8000abee1a
0xffffffa05856bce0 : 0xffffff8002c3a05a
0xffffffa05856bd00 : 0xffffff8002c2070f
0xffffffa05856bd60 : 0xffffff8002c20c53
0xffffffa05856bd80 : 0xffffff8002c1edc2
0xffffffa05856bdd0 : 0xffffff8002c29aff
0xffffffa05856bdf0 : 0xffffff80009fcfe1
0xffffffa05856be60 : 0xffffff80009fcd7a
0xffffffa05856be80 : 0xffffff8000301345
0xffffffa05856bef0 : 0xffffff8000302254
0xffffffa05856bfa0 : 0xffffff800026113e
Kernel Extensions in backtrace:
com.apple.iokit.IOPCIFamily(2.9)[A18ACD60-A811-3624-B50D-4F929836EE79]@0xffffff8002c17000->0xffffff8002c3efff

Process name corresponding to current thread: kerneltask
Boot args: -x

Mac OS version:
20B50

Kernel version:
Darwin Kernel Version 20.1.0: Sat Oct 31 00:07:11 PDT 2020; root:xnu-7195.50.7~2/RELEASEX8664
Kernel UUID: 84C6DC45-6B02-335F-9439-5D2A9BC385A4
KernelCache slide: 0x0000000000000000
KernelCache base: 0xffffff8000200000
Kernel slide: 0x0000000000010000
Kernel text base: 0xffffff8000210000
HIB text base: 0xffffff8000100000
System model name: iMac18,3 (Mac-BE088AF8C5EB4FA2)
System shutdown begun: NO
Panic diags file available: YES (0x0)
Hibernation exit count: 0

System uptime in nanoseconds: 296711176809
Last Sleep: absolute basetsc base_nano
Uptime : 0x00000045155d454f
Sleep : 0x0000003d7fdc41a8 0x0000000768547b2a 0x0000000000000000
Wake : 0x0000003d99e0c32c 0x000000009cd9fce0 0x0000003d98c91cea
last started kext at 89254154819: >!AHIDKeyboard 222 (addr 0xffffff800168d000, size 16384)
loaded kexts:

!ATopCaseHIDEventDriver 4000.27
@filesystems.autofs 3.0
AGPM 119
X86PlatformShim 1.0.0
@kext.AMDFramebuffer 4.0.0
!AGraphicsDevicePolicy 6.1.27
@DontStealMacOSX 7.0.0
AGDCBacklightControl 6.1.27
|Broadcom!B20703USBTransport 8.0.1f5
!ABacklight 180.3
!AMCCSControl 1.14
!A!IPCHPMC 2.0.1
ACPISMCPlatformPlugin 1.0.0
@kext.AMD9500!C 4.0.0
!A!IKBLGraphicsFramebuffer 16.0.0
|IO!BUSBDFU 8.0.1f5
!AFileSystemDriver 3.0.1
@filesystems.tmpfs 1
@filesystems.hfs.kext 556.41.1
@BootCache 40
@!AFSCompression.!AFSCompressionTypeZlib 1.0.0
@!AFSCompression.!AFSCompressionTypeDataless 1.0.0d1
@filesystems.apfs 1677.50.1
!ASDXC 1.9.0
|!ABCM5701Ethernet 11.0.0
AirPort.BrcmNIC 1400.1.1
!AAHCIPort 346
@private.KextAudit 1.0
!AACPIButtons 6.1
!ARTC 2.0
!ASMBIOS 2.1
!AACPIEC 6.1
!AAPIC 1.7
@!ASystemPolicy 2.0.0
@nke.applicationfirewall 310
|IOKitRegistryCompatibility 1
|EndpointSecurity 1
!AHIDKeyboard 222
!AMultitouchDriver 4400.28
!AInputDeviceSupport 4400.35
!AHS!BDriver 4000.27
IO!BHIDDriver 8.0.1f5
@kext.triggers 1.0
!AGraphicsControl 6.1.27
|Broadcom!BHost!CUSBTransport 8.0.1f5
|IO!BHost!CUSBTransport 8.0.1f5
|IO!BHost!CTransport 8.0.1f5
!ASMBusPCI 1.0.14d1
!ABacklightExpert 1.1.0
!ASMBus!C 1.0.18d1
IOPlatformPluginLegacy 1.0.0
X86PlatformPlugin 1.0.0
IOPlatformPlugin!F 6.0.0d8
|IONDRVSupport 585
@kext.AMDSupport 4.0.0
@!AGPUWrangler 6.1.27
|IOAccelerator!F2 439.35.4
@!AGraphicsDeviceControl 6.1.27
|IOGraphics!F 585
usb.IOUSBHostHIDDevice 1.2
usb.cdc 5.0.0
usb.networking 5.0.0
usb.!UHostCompositeDevice 1.2
!AThunderboltDPInAdapter 8.1.4
!AThunderboltDPAdapter!F 8.1.4
!AThunderboltPCIDownAdapter 4.1.1
!AHPM 3.4.4
!A!ILpssI2C!C 3.0.60
!A!ILpssDmac 3.0.60
!ABSDKextStarter 3
|IOSurface 289.3
@filesystems.hfs.encodings.kext 1
!AXsanScheme 3
|IOAHCIBlock!S 332
!AThunderboltNHI 7.2.8
|IOThunderbolt!F 9.3.2
|IO80211!F 1200.12.2b1
|IOSkywalk!F 1
mDNSOffloadUserClient 1.0.1b8
corecapture 1.0.4
|IONVMe!F 2.1.0
!A!ILpssI2C 3.0.60
!A!ILpssGspi 3.0.60
usb.!UXHCIPCI 1.2
usb.!UXHCI 1.2
|IOAHCI!F 294
usb.!UHostPacketFilter 1.0
|IOUSB!F 900.4.2
!AEFINVRAM 2.1
!AEFIRuntime 2.1
|IOSMBus!F 1.1
|IOHID!F 2.0.0
$!AImage4 3.0.0
|IOTimeSync!F 900.11
|IONetworking!F 3.4
DiskImages 493.0.0
|IO!B!F 8.0.1f5
|IOReport!F 47
|IO!BPacketLogger 8.0.1f5
$quarantine 4
$sandbox 300.0
@kext.!AMatch 1.0.0d1
|CoreAnalytics!F 1
!ASSE 1.0
!AKeyStore 2
!UTDM 511.40.9
|IOUSBMass!SDriver 184.40.6
|IOSCSIBlockCommandsDevice 436.40.6
|IO!S!F 2.1
|IOSCSIArchitectureModel!F 436.40.6
!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 1.0
@kec.Libm 1

2 more crashes this week. Does Apple monitor this site or is the site a place for developers to try and help developers. I'm not sure how developers would help with MacOS crash issues. Do I need to post somewhere else?

Crashed again - same error

Got the same issue .. freezing iMac (27", 5k, 2017) and then crash

panic(cpu 2 caller 0xffffff8021353a13): userspace watchdog timeout: no successful checkins from com.apple.WindowServer in 120 seconds
service: com.apple.logd, total successful checkins since wake (7450 seconds ago): 746, last successful checkin: 0 seconds ago
service: com.apple.WindowServer, total successful checkins since wake (7450 seconds ago): 734, last successful checkin: 120 seconds ago

Backtrace (CPU 2), Frame : Return Address
0xffffffc1de83b670 : 0xffffff801e0bc66d
0xffffffc1de83b6c0 : 0xffffff801e1ff073
0xffffffc1de83b700 : 0xffffff801e1ef6aa
0xffffffc1de83b750 : 0xffffff801e061a2f
0xffffffc1de83b770 : 0xffffff801e0bbf0d
0xffffffc1de83b890 : 0xffffff801e0bc1f8
0xffffffc1de83b900 : 0xffffff801e8bee84
0xffffffc1de83b970 : 0xffffff8021353a13
0xffffffc1de83b980 : 0xffffff80213536ba
0xffffffc1de83b9a0 : 0xffffff801e8460ee
0xffffffc1de83b9f0 : 0xffffff8021352b0a
0xffffffc1de83bb20 : 0xffffff801e8502bb
0xffffffc1de83bc80 : 0xffffff801e1aaa61
0xffffffc1de83bd90 : 0xffffff801e0c1d77
0xffffffc1de83be00 : 0xffffff801e0985d5
0xffffffc1de83be60 : 0xffffff801e0afb82
0xffffffc1de83bef0 : 0xffffff801e1d3823
0xffffffc1de83bfa0 : 0xffffff801e062216
Kernel Extensions in backtrace:
com.apple.driver.watchdog(1.0)[7948A279-A8B8-3650-AFBF-B1E3EB68942A]@0xffffff8021352000->0xffffff8021353fff

Process name corresponding to current thread: watchdogd

Mac OS version:
20B29

Kernel version:
Darwin Kernel Version 20.1.0: Sat Oct 31 00:07:11 PDT 2020; root:xnu-7195.50.7~2/RELEASEX8664
Kernel UUID: 84C6DC45-6B02-335F-9439-5D2A9BC385A4
KernelCache slide: 0x000000001de00000
KernelCache base: 0xffffff801e000000
Kernel slide: 0x000000001de10000
Kernel text base: 0xffffff801e010000
_HIB text base: 0xffffff801df00000
System model name: iMac18,3 (Mac-BE088AF8C5EB4FA2)
System shutdown begun: NO
Panic diags file available: YES (0x0)
Hibernation exit count: 0

System uptime in nanoseconds: 585885712425398
Last Sleep: absolute basetsc base_nano
Uptime : 0x000214dc25c4a4aa
Sleep : 0x000203abb8ec0823 0x00000000ae0831d4 0x000201c218ee9dbd
Wake : 0x000203abbdbd2260 0x00000000ae1def24 0x000203abbcb9502d
last started kext at 581375575776213: >usb.!UUserHCI 1 (addr 0xffffff7fbdbef000, size 98304)
last stopped kext at 581479310749768: >usb.!UUserHCI 1 (addr 0xffffff7fbdbef000, size 98304)
loaded kexts:
com.vmware.kext.vmioplug.17.1.5 17.1.5
com.vmware.kext.vmnet 1298.99.98
com.vmware.kext.vmci 90.8.1
com.vmware.kext.vmx86 1298.99.98
com.kairos.driver.DuetDisplay 1

!ATopCaseHIDEventDriver 4000.27
X86PlatformShim 1.0.0
AGPM 119
!APlatformEnabler 2.7.0d0
AudioAUUC 1.70
@filesystems.autofs 3.0
@fileutil 20.036.15
@kext.AMDFramebuffer 4.0.0
@kext.AMDRadeonX4000 4.0.0
@kext.AMDRadeonServiceManager 4.0.0
!A!IKBLGraphics 16.0.0
!AHDA 283.15
!A!IPCHPMC 2.0.1
!AGraphicsDevicePolicy 6.1.27
!AUpstreamUserClient 3.6.8
eficheck 1
!A!IKBLGraphicsFramebuffer 16.0.0
@AGDCPluginDisplayMetrics 6.1.27
pmtelemetry 1
LuaHardwareAccess 1.0.16
|IOUserEthernet 1.0.1
|IO!BSerialManager 8.0.1f5
@DontStealMacOSX 7.0.0
!AHV 1
!ADiskImages2 1
!AThunderboltIP 4.0.3
!AGFXHDA 100.1.431
!ASMCLMU 212
@kext.AMD9500!C 4.0.0
|Broadcom!B20703USBTransport 8.0.1f5
!A!ISlowAdaptiveClocking 4.0.0
!AMCCSControl 1.14
@filesystems.tmpfs 1
@filesystems.hfs.kext 556.41.1
@BootCache 40
@!AFSCompression.!AFSCompressionTypeZlib 1.0.0
@!AFSCompression.!AFSCompressionTypeDataless 1.0.0d1
@filesystems.apfs 1677.50.1
|!ABCM5701Ethernet 11.0.0
!ASDXC 1.9.0
AirPort.BrcmNIC 1400.1.1
!AAHCIPort 346
@private.KextAudit 1.0
!AACPIButtons 6.1
!ARTC 2.0
!ASMBIOS 2.1
!AACPIEC 6.1
!AAPIC 1.7
@!ASystemPolicy 2.0.0
@nke.applicationfirewall 310
|IOKitRegistryCompatibility 1
|EndpointSecurity 1
!AHIDKeyboard 222
!AMultitouchDriver 4400.28
!AInputDeviceSupport 4400.35
!AHS!BDriver 4000.27
IO!BHIDDriver 8.0.1f5
@kext.triggers 1.0
@kext.AMDRadeonX4200HWLibs 1.0
@kext.AMDRadeonX4000HWServices 4.0.0
DspFuncLib 283.15
@kext.OSvKernDSPLib 529
!AGraphicsControl 6.1.27
X86PlatformPlugin 1.0.0
IOPlatformPlugin!F 6.0.0d8
|IOAccelerator!F2 439.35.4
|IOSerial!F 11
@!AGPUWrangler 6.1.27
!ASMBusPCI 1.0.14d1
|IONDRVSupport 585
@kext.AMDSupport 4.0.0
@!AGraphicsDeviceControl 6.1.27
|IOAVB!F 900.12
@plugin.IOgPTPPlugin 900.11
|IOEthernetAVB!C 1.1.0
!UAudio 401.4
!AHDA!C 283.15
|IOHDA!F 283.15
|IOAudio!F 300.6.1
@vecLib.kext 1.2.0
@plugin.IOAVBDiscoveryPlugin 900.12
|Broadcom!BHost!CUSBTransport 8.0.1f5
|IO!BHost!CUSBTransport 8.0.1f5
|IO!BHost!CTransport 8.0.1f5
|IOSlowAdaptiveClocking!F 1.0.0
|IOGraphics!F 585
!ASMBus!C 1.0.18d1
usb.!UHub 1.2
usb.networking 5.0.0
usb.!UHostCompositeDevice 1.2
!AThunderboltDPInAdapter 8.1.4
!AThunderboltDPAdapter!F 8.1.4
!AThunderboltPCIDownAdapter 4.1.1
!AHPM 3.4.4
!A!ILpssI2C!C 3.0.60
!A!ILpssDmac 3.0.60
!ABSDKextStarter 3
|IOSurface 289.3
@filesystems.hfs.encodings.kext 1
|IOAHCIBlock!S 332
!AThunderboltNHI 7.2.8
|IOThunderbolt!F 9.3.2
|IO80211!F 1200.12.2b1
|IOSkywalk!F 1
mDNSOffloadUserClient 1.0.1b8
corecapture 1.0.4
|IONVMe!F 2.1.0
!A!ILpssI2C 3.0.60
usb.!UXHCIPCI 1.2
usb.!UXHCI 1.2
|IOAHCI!F 294
|IOUSB!F 900.4.2
!AEFINVRAM 2.1
!AEFIRuntime 2.1
|IOSMBus!F 1.1
|IOHID!F 2.0.0
$!AImage4 3.0.0
|IOTimeSync!F 900.11
|IONetworking!F 3.4
DiskImages 493.0.0
|IO!B!F 8.0.1f5
|IOReport!F 47
|IO!BPacketLogger 8.0.1f5
$quarantine 4
$sandbox 300.0
@kext.!AMatch 1.0.0d1
|CoreAnalytics!F 1
!ASSE 1.0
!AKeyStore 2
!UTDM 511.40.9
|IOUSBMass!SDriver 184.40.6
|IOSCSIBlockCommandsDevice 436.40.6
|IO!S!F 2.1
|IOSCSIArchitectureModel!F 436.40.6
!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 1.0
@kec.Libm 1

I'm getting the same crashes I believe, on 16" i9 Macbook Pro. 5-10 crashes per day currently. The OS is a joke. Makes me miss Windows ME.

Did you have any luck with your crashes?

panic(cpu 14 caller 0xffffff801d753a13): userspace watchdog timeout: no successful checkins from com.apple.remoted in 180 seconds
service returned not alive with context : unresponsive work processor(s): remoted heartbeat on bridge 
service: com.apple.logd, total successful checkins since load (3150 seconds ago): 316, last successful checkin: 0 seconds ago
service: com.apple.WindowServer, total successful checkins since load (3120 seconds ago): 312, last successful checkin: 0 seconds ago
service: com.apple.remoted, total successful checkins since load (3150 seconds ago): 296, last successful checkin: 180 seconds ago

Backtrace (CPU 14), Frame : Return Address
0xffffffb0dd29b670 : 0xffffff801a4bc66d 
0xffffffb0dd29b6c0 : 0xffffff801a5ff073 
0xffffffb0dd29b700 : 0xffffff801a5ef6aa 
0xffffffb0dd29b750 : 0xffffff801a461a2f 
0xffffffb0dd29b770 : 0xffffff801a4bbf0d 
0xffffffb0dd29b890 : 0xffffff801a4bc1f8 
0xffffffb0dd29b900 : 0xffffff801acbee84 
0xffffffb0dd29b970 : 0xffffff801d753a13 
0xffffffb0dd29b980 : 0xffffff801d7536ba 
0xffffffb0dd29b9a0 : 0xffffff801ac460ee 
0xffffffb0dd29b9f0 : 0xffffff801d752b0a 
0xffffffb0dd29bb20 : 0xffffff801ac502bb 
0xffffffb0dd29bc80 : 0xffffff801a5aaa61 
0xffffffb0dd29bd90 : 0xffffff801a4c1d77 
0xffffffb0dd29be00 : 0xffffff801a4985d5 
0xffffffb0dd29be60 : 0xffffff801a4afb82 
0xffffffb0dd29bef0 : 0xffffff801a5d3823 
0xffffffb0dd29bfa0 : 0xffffff801a462216 
      Kernel Extensions in backtrace:
         com.apple.driver.watchdog(1.0)[7948A279-A8B8-3650-AFBF-B1E3EB68942A]@0xffffff801d752000->0xffffff801d753fff

Process name corresponding to current thread: watchdogd

Mac OS version:
20B29

Kernel version:
Darwin Kernel Version 20.1.0: Sat Oct 31 00:07:11 PDT 2020; root:xnu-7195.50.7~2/RELEASEX8664
Kernel UUID: 84C6DC45-6B02-335F-9439-5D2A9BC385A4
KernelCache slide: 0x000000001a200000
KernelCache base:  0xffffff801a400000
Kernel slide:      0x000000001a210000
Kernel text base:  0xffffff801a410000
_HIB  text base: 0xffffff801a300000
System model name: MacBookPro16,1 (Mac-E1008331FDC96864)
System shutdown begun: NO
Hibernation exit count: 0

System uptime in nanoseconds: 3152529685922
Last Sleep:           absolute           basetsc          base_nano
  Uptime  : 0x000002de01698847
  Sleep   : 0x0000000000000000 0x0000000000000000 0x0000000000000000
  Wake    : 0x0000000000000000 0x0000000591bf69ce 0x0000000000000000
last started kext at 11011380772: >AudioAUUC    1.70 (addr 0xffffff7fb9bd5000, size 12288)
last stopped kext at 2995309686311: >usb.!UHostBillboardDevice    1.0 (addr 0xffffff801d23c000, size 8192)
loaded kexts:
com.paragon-software.filesystems.ntfs    4.6.15

!APlatformEnabler    2.7.0d0
AGPM    119
X86PlatformShim    1.0.0
@filesystems.autofs    3.0
!ATopCaseHIDEventDriver    4000.27
!AHIDALSService    1
@fileutil    20.036.15
@kext.AMDRadeonX6000    4.0.0
@kext.AMDRadeonServiceManager    4.0.0
!AUpstreamUserClient    3.6.8
!AGraphicsDevicePolicy    6.1.27
@AGDCPluginDisplayMetrics    6.1.27
AGDCBacklightControl    6.1.27
pmtelemetry    1
LuaHardwareAccess    1.0.16
|IOUserEthernet    1.0.1
|IO!BSerialManager    8.0.1f5
@DontStealMacOSX    7.0.0
!AHV    1
!A!IKBLGraphics    16.0.0
!ADiskImages2    1
!A!IPCHPMC    2.0.1
!AMuxControl2    6.1.27
!A!ISlowAdaptiveClocking    4.0.0
!A!ICFLGraphicsFramebuffer    16.0.0
!AGFXHDA    100.1.431
!AThunderboltIP    4.0.3
BridgeAudioCommunication    100.2
!AAVEBridge    6.1
!AMCCSControl    1.14
!ABridgeAudio!C    100.2
BCMWLANFirmware4378.Hashstore    1
BCMWLANFirmware4377.Hashstore    1
BCMWLANFirmware4364.Hashstore    1
BCMWLANFirmware4355.Hashstore    1
!ABCMWLANBusInterfacePCIeMac    1
@filesystems.tmpfs    1
@filesystems.hfs.kext    556.41.1
@BootCache    40
@!AFSCompression.!AFSCompressionTypeZlib    1.0.0
@!AFSCompression.!AFSCompressionTypeDataless    1.0.0d1
@filesystems.apfs    1677.50.1
@private.KextAudit    1.0
!ASmartBatteryManager    161.0.0
!AACPIButtons    6.1
!ASMBIOS    2.1
!AACPIEC    6.1
!AAPIC    1.7
@!ASystemPolicy    2.0.0
@nke.applicationfirewall    310
|IOKitRegistryCompatibility    1
|EndpointSecurity    1
@kext.triggers    1.0
!AHS!BDriver    4000.27
IO!BHIDDriver    8.0.1f5
!AHIDKeyboard    222
!AActuatorDriver    4400.28
!AMultitouchDriver    4400.28
!AInputDeviceSupport    4400.35
@kext.AMDRadeonX6100HWLibs    1.0
|IOAVB!F    900.12
|IO!BHost!CUARTTransport    8.0.1f5
|IO!BHost!CTransport    8.0.1f5
!ABacklightExpert    1.1.0
!A!ILpssUARTv1    3.0.60
!A!ILpssUARTCommon    3.0.60
!AOnboardSerial    1.0
@!AGPUWrangler    6.1.27
!AGraphicsControl    6.1.27
|IOSlowAdaptiveClocking!F    1.0.0
@kext.AMDRadeonX6000Framebuffer    4.0.0
@kext.AMDSupport    4.0.0
|IOAccelerator!F2    439.35.4
@!AGraphicsDeviceControl    6.1.27
|IONDRVSupport    585
@kext.AMDRadeonX6000HWServices    4.0.0
!ASMBus!C    1.0.18d1
|IOGraphics!F    585
|IOAudio!F    300.6.1
@vecLib.kext    1.2.0
X86PlatformPlugin    1.0.0
IOPlatformPlugin!F    6.0.0d8
@plugin.IOgPTPPlugin    900.11
|IOEthernetAVB!C    1.1.0
usb.cdc.ncm    5.0.0
usb.cdc    5.0.0
usb.networking    5.0.0
usb.!UHostCompositeDevice    1.2
!ABCMWLANCoreMac    1.0.0
|IOSerial!F    11
|IO80211!FV2    1200.12.2b1
IOImageLoader    1.0.0
corecapture    1.0.4
!AThunderboltPCIDownAdapter    4.1.1
!AThunderboltDPInAdapter    8.1.4
!AThunderboltDPAdapter!F    8.1.4
!AHPM    3.4.4
!A!ILpssI2C!C    3.0.60
!A!ILpssI2C    3.0.60
!A!ILpssDmac    3.0.60
!ABSDKextStarter    3
|IOSurface    289.3
|IOSkywalk!F    1
mDNSOffloadUserClient    1.0.1b8
@filesystems.hfs.encodings.kext    1
usb.!UVHCIBCE    1.2
usb.!UVHCICommonBCE    1.0
usb.!UVHCI    1.2
usb.!UVHCICommon    1.0
!AEffaceableNOR    1.0
|IOBufferCopy!C    1.1.0
|IOBufferCopyEngine!F    1
|IONVMe!F    2.1.0
!AThunderboltNHI    7.2.8
|IOThunderbolt!F    9.3.2
|IOUSB!F    900.4.2
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
$!AImage4    3.0.0
|IOTimeSync!F    900.11
|IONetworking!F    3.4
DiskImages    493.0.0
|IO!B!F    8.0.1f5
|IOReport!F    47
|IO!BPacketLogger    8.0.1f5
$quarantine    4
$sandbox    300.0
@kext.!AMatch    1.0.0d1
|CoreAnalytics!F    1
!ASSE    1.0
!AKeyStore    2
!UTDM    511.40.9
|IOUSBMass!SDriver    184.40.6
|IOSCSIBlockCommandsDevice    436.40.6
|IO!S!F    2.1
|IOSCSIArchitectureModel!F    436.40.6
!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    1.0
@kec.Libm    1

Read elsewhere that someone got some reprieve from the issue by deleting AVG / Avast. Does anyone have that installed here?

Since i bought iMac 27' 2020 a month ago I have the same problem, I thought it would be solved by going to Big Sur and clean installation but the problem persists and still once every 1-3 days iMac restarts....

Code Block 
panic(cpu 8 caller 0xffffff800c553a13): userspace watchdog timeout: no successful checkins from com.apple.WindowServer in 120 seconds
service: com.apple.logd, total successful checkins since wake (5320 seconds ago): 533, last successful checkin: 0 seconds ago
service: com.apple.WindowServer, total successful checkins since wake (5320 seconds ago): 521, last successful checkin: 120 seconds ago
service: com.apple.remoted, total successful checkins since wake (5320 seconds ago): 533, last successful checkin: 0 seconds ago
Backtrace (CPU 8), Frame : Return Address
0xffffffb8e664b670 : 0xffffff80092bc66d 
0xffffffb8e664b6c0 : 0xffffff80093ff073 
...

I'm seeing the same thing to the point I'm trying to figure out what is causing this so I can submit feedback. I'm currently running Big Sur Beta 11.1 and have the ability to submit feedback to the developers if I actually could understand what application is causing the crash. This log that it auto generates sounds like gibberish. Would be helpful if it actually told you what this was a little clearer to us non computer programers. If anyone knows how to read this a little to tell me what caused this I will submit it.

panic(cpu 1 caller 0xffffff8012768a25): userspace watchdog timeout: no successful checkins from com.apple.logd in 120 seconds
service returned not alive with context : unresponsive dispatch queue(s): com.apple.firehose.io-wl
service: com.apple.logd, total successful checkins since load (4470 seconds ago): 436, last successful checkin: 120 seconds ago
service: com.apple.WindowServer, total successful checkins since load (4410 seconds ago): 441, last successful checkin: 0 seconds ago

Backtrace (CPU 1), Frame : Return Address
0xffffffc11f023670 : 0xffffff800f4b38fd
0xffffffc11f0236c0 : 0xffffff800f5f64e3
0xffffffc11f023700 : 0xffffff800f5e6b1a
0xffffffc11f023750 : 0xffffff800f458a2f
0xffffffc11f023770 : 0xffffff800f4b319d
0xffffffc11f023890 : 0xffffff800f4b3488
0xffffffc11f023900 : 0xffffff800fcb7cf4
0xffffffc11f023970 : 0xffffff8012768a25
0xffffffc11f023980 : 0xffffff8012768678
0xffffffc11f0239a0 : 0xffffff800fc3ef8e
0xffffffc11f0239f0 : 0xffffff8012767ab4
0xffffffc11f023b20 : 0xffffff800fc4915b
0xffffffc11f023c80 : 0xffffff800f5a1b81
0xffffffc11f023d90 : 0xffffff800f4b8ef7
0xffffffc11f023e00 : 0xffffff800f48f705
0xffffffc11f023e60 : 0xffffff800f4a6e12
0xffffffc11f023ef0 : 0xffffff800f5cacc3
0xffffffc11f023fa0 : 0xffffff800f459216
Kernel Extensions in backtrace:
com.apple.driver.watchdog(1.0)[C1A64FD7-AD16-37E0-8FA1-A78A8E91D9FF]@0xffffff8012767000->0xffffff8012768fff

Process name corresponding to current thread: watchdogd

Mac OS version:
20C5048k

Kernel version:
Darwin Kernel Version 20.2.0: Tue Nov 10 21:14:14 PST 2020; root:xnu-7195.60.70.111.1~1/RELEASEX8664
Kernel UUID: 1C1D9321-73E9-3B05-AD5D-926E3B0E53AB
KernelCache slide: 0x000000000f200000
KernelCache base: 0xffffff800f400000
Kernel slide: 0x000000000f210000
Kernel text base: 0xffffff800f410000
_HIB text base: 0xffffff800f300000
System model name: iMac17,1 (Mac-B809C3757DA9BB8D)
System shutdown begun: NO
Panic diags file available: YES (0x0)
Hibernation exit count: 0

System uptime in nanoseconds: 4479569922478
Last Sleep: absolute basetsc base_nano
Uptime : 0x00000412fb2c8c9d
Sleep : 0x0000000000000000 0x0000000000000000 0x0000000000000000
Wake : 0x0000000000000000 0x0000001827ad7498 0x0000000000000000
last started kext at 841472594943: >!AXsanScheme 3 (addr 0xffffff8010c66000, size 12288)
last stopped kext at 536370833172: >usb.!UUserHCI 1 (addr 0xffffff7fafd9d000, size 98304)
loaded kexts:
com.bitgapp.eqMac2Driver 2.0
com.Cycling74.driver.Soundflower 1.6.7
com.vidyo.driver.VidyoCamera 1.0.0d1

usb.!UUserHCI 1
!ATopCaseHIDEventDriver 4020.6
@kext.AMDRadeonServiceManager 4.0.2
!APlatformEnabler 2.7.0d0
AGPM 119
X86PlatformShim 1.0.0
@fileutil 20.036.15
@filesystems.autofs 3.0
AudioAUUC 1.70
!AUpstreamUserClient 3.6.8
@kext.AMDFramebuffer 4.0.2
!AMikeyHIDDriver 131
@kext.AMDRadeonX4000 4.0.2
!AGraphicsDevicePolicy 6.2.2
!AMikeyDriver 283.15
!AHDA 283.15
@AGDCPluginDisplayMetrics 6.2.2
pmtelemetry 1
LuaHardwareAccess 1.0.16
|IOUserEthernet 1.0.1
|IO!BSerialManager 8.0.2f2
eficheck 1
|Broadcom!B20703USBTransport 8.0.2f2
@DontStealMacOSX 7.0.0
!A!IPCHPMC 2.0.1
!AHV 1
!ADiskImages2 1
!A!ISKLGraphics 16.0.1
!AThunderboltIP 4.0.3
!A!ISKLGraphicsFramebuffer 16.0.1
!A!ISlowAdaptiveClocking 4.0.0
!ASMCLMU 212
!AMCCSControl 1.14
@kext.AMD9000!C 4.0.2
|SCSITaskUserClient 436.40.6
@filesystems.tmpfs 1
@filesystems.hfs.kext 556.60.1
@BootCache 40
@!AFSCompression.!AFSCompressionTypeZlib 1.0.0
@!AFSCompression.!AFSCompressionTypeDataless 1.0.0d1
@filesystems.apfs 1677.60.22
|!ABCM5701Ethernet 11.0.0
!ASDXC 1.9.0
AirPort.BrcmNIC 1400.1.1
!AAHCIPort 346
@private.KextAudit 1.0
!AACPIButtons 6.1
!ARTC 2.0
!ASMBIOS 2.1
!AACPIEC 6.1
!AAPIC 1.7
@!ASystemPolicy 2.0.0
@nke.applicationfirewall 310
|IOKitRegistryCompatibility 1
|EndpointSecurity 1
!AXsanScheme 3
!AActuatorDriver 4400.28
!AHIDKeyboard 222
!AMultitouchDriver 4400.28
!AInputDeviceSupport 4400.35
!AHS!BDriver 4020.6
IO!BHIDDriver 8.0.2f2
@kext.triggers 1.0
@kext.AMDRadeonX4070HWLibs 1.0
@kext.AMDRadeonX4000HWServices 4.0.2
!AGraphicsControl 6.2.2
DspFuncLib 283.15
@kext.OSvKernDSPLib 529
|IOVideo!F 1.2.1
|IOStream!F 1.1.0
|IOSerial!F 11
|IOAVB!F 900.12
!ASMBusPCI 1.0.14d1
|Broadcom!BHost!CUSBTransport 8.0.2f2
|IO!BHost!CUSBTransport 8.0.2f2
|IO!BHost!CTransport 8.0.2f2
@plugin.IOgPTPPlugin 900.11
|IOEthernetAVB!C 1.1.0
X86PlatformPlugin 1.0.0
IOPlatformPlugin!F 6.0.0d8
!AHDA!C 283.15
|IOHDA!F 283.15
!AThunderboltEDMSink 5.0.3
|IOAccelerator!F2 439.52
@!AGPUWrangler 6.2.2
|IOSlowAdaptiveClocking!F 1.0.0
!UAudio 401.4
|IOAudio!F 300.6.1
@vecLib.kext 1.2.0
|IONDRVSupport 585
!ASMBus!C 1.0.18d1
@kext.AMDSupport 4.0.2
@!AGraphicsDeviceControl 6.2.2
|IOGraphics!F 585
usb.!UHub 1.2
usb.networking 5.0.0
usb.!UHostCompositeDevice 1.2
!AThunderboltDPOutAdapter 8.1.4
!AThunderboltDPInAdapter 8.1.4
!AThunderboltDPAdapter!F 8.1.4
!AThunderboltPCIDownAdapter 4.1.1
!ABSDKextStarter 3
|IOSurface 289.3
@filesystems.hfs.encodings.kext 1
|IOAHCIBlock!S 332
!AThunderboltNHI 7.2.8
|IOThunderbolt!F 9.3.2
|IO80211!F 1200.12.2b1
|IOSkywalk!F 1
mDNSOffloadUserClient 1.0.1b8
corecapture 1.0.4
|IOAHCI!F 294
|IOUSB!F 900.4.2
usb.!UXHCIPCI 1.2
usb.!UXHCI 1.2
!AEFINVRAM 2.1
!AEFIRuntime 2.1
|IOSMBus!F 1.1
|IOHID!F 2.0.0
$!AImage4 3.0.0
|IOTimeSync!F 900.11
|IONetworking!F 3.4
DiskImages 493.0.0
|IO!B!F 8.0.2f2
|IOReport!F 47
|IO!BPacketLogger 8.0.2f2
$quarantine 4
$sandbox 300.0
@kext.!AMatch 1.0.0d1
|CoreAnalytics!F 1
!ASSE 1.0
!AKeyStore 2
!UTDM 511.60.2
|IOUSBMass!SDriver 184.40.6
|IOSCSIBlockCommandsDevice 436.40.6
|IO!S!F 2.1
|IOSCSIArchitectureModel!F 436.40.6
!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 1.0
@kec.Libm 1

More than likely a peripheral....I've had the same issue with an external HD...was able to get that fixed. Also had my 4K television hooked up prior to the Big Sur release and it was working fine. After the release it froze 10-14 times a day or crashed. Unplugged the monitor and now it is fine.

Having a computer that's designed to work with peripherals such as ext. monitor,TV, ext HD etc to only work stably when those items are NOT connected is INSANE on the part of Apple and its apparently flawed macOS BigSur

I had the same issue after upgrading to Big Sur. Computer would crash every five minutes with no applications running (just sitting idle).

Apple walked me through the following steps.

• Boot into Safe Mode and see if computer crashes (it did eventually)

• Create a new user account and see if the computer crashes (it did)

These didn't solve my problem, but may be helpful for others. Eventually, I needed to boot into Internet Recover mode (Shift-Command-R), erase hard drive, reformat hard drive, and re-install Big Sur. Once I did that, the problem was resolved. A radical solution, but it worked. Apple was very helpful in resolving this problem. On the positive side, a new install was a nice refresh and my laptop runs faster. Luckily, I had all my data files in my Apple iCloud Drive.