My Mac freezes when connected to an external display when using safari (the last 6 times it has frozen I have been using safari at the time). The screen goes blank (backlight still on) then the computer restarted after ~ 60 seconds and I get the following error message when I log back in (See below)
iMac (Retina 5K, 27-inch, 2020)
Processor 3.8 GHz 8-Core Intel Core i7
Memory: 40 GB 2667 MHz DDR4
Graphics: AMD Radeon Pro 5500 XT 8 GB
Can anyone help me to understand the report below and figure out what could be causing this?
panic(cpu 6 caller 0xffffff801d753a13): userspace watchdog timeout: no successful checkins from com.apple.WindowServer in 120 seconds
service: com.apple.logd, total successful checkins since load (1310 seconds ago): 132, last successful checkin: 0 seconds ago
service: com.apple.WindowServer, total successful checkins since load (1280 seconds ago): 116, last successful checkin: 120 seconds ago
service: com.apple.remoted, total successful checkins since load (1310 seconds ago): 130, last successful checkin: 0 seconds ago
Backtrace (CPU 6), Frame : Return Address
0xffffffb5503d3670 : 0xffffff801a4bc66d
0xffffffb5503d36c0 : 0xffffff801a5ff073
0xffffffb5503d3700 : 0xffffff801a5ef6aa
0xffffffb5503d3750 : 0xffffff801a461a2f
0xffffffb5503d3770 : 0xffffff801a4bbf0d
0xffffffb5503d3890 : 0xffffff801a4bc1f8
0xffffffb5503d3900 : 0xffffff801acbee84
0xffffffb5503d3970 : 0xffffff801d753a13
0xffffffb5503d3980 : 0xffffff801d7536ba
0xffffffb5503d39a0 : 0xffffff801ac460ee
0xffffffb5503d39f0 : 0xffffff801d752b0a
0xffffffb5503d3b20 : 0xffffff801ac502bb
0xffffffb5503d3c80 : 0xffffff801a5aaa61
0xffffffb5503d3d90 : 0xffffff801a4c1d77
0xffffffb5503d3e00 : 0xffffff801a4985d5
0xffffffb5503d3e60 : 0xffffff801a4afb82
0xffffffb5503d3ef0 : 0xffffff801a5d3823
0xffffffb5503d3fa0 : 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
Boot args: chunklist-security-epoch=0 -chunklist-no-rev2-dev 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: 0x000000001a200000
KernelCache base: 0xffffff801a400000
Kernel slide: 0x000000001a210000
Kernel text base: 0xffffff801a410000
_HIB text base: 0xffffff801a300000
System model name: iMac20,1 (Mac-CFF7D910A743CAAF)
System shutdown begun: NO
Hibernation exit count: 0
System uptime in nanoseconds: 1312575642395
Last Sleep: absolute basetsc base_nano
Uptime : 0x000001319b9adffb
Sleep : 0x0000000000000000 0x0000000000000000 0x0000000000000000
Wake : 0x0000000000000000 0x00000012c54de0a8 0x0000000000000000
last started kext at 560912607718: >usb.!UUserHCI 1 (addr 0xffffff7fb9fef000, size 98304)
last stopped kext at 779652293646: >usb.!UUserHCI 1 (addr 0xffffff7fb9fef000, size 98304)
loaded kexts:
@filesystems.smbfs 3.4.1
!ATopCaseHIDEventDriver 4000.27
AudioAUUC 1.70
!AHIDALSService 1
AGPM 119
!APlatformEnabler 2.7.0d0
X86PlatformShim 1.0.0
!AUpstreamUserClient 3.6.8
@kext.AMDRadeonX6000 4.0.0
@kext.AMDRadeonServiceManager 4.0.0
!AGraphicsDevicePolicy 6.1.27
@filesystems.autofs 3.0
@AGDCPluginDisplayMetrics 6.1.27
pmtelemetry 1
LuaHardwareAccess 1.0.16
|IOUserEthernet 1.0.1
@fileutil 20.036.15
|IO!BSerialManager 8.0.1f5
@DontStealMacOSX 7.0.0
!AHV 1
!ADiskImages2 1
!A!IKBLGraphics 16.0.0
!A!ICFLGraphicsFramebuffer 16.0.0
!ABridgeAudio!C 100.2
!A!ISlowAdaptiveClocking 4.0.0
!AGFXHDA 100.1.431
!AThunderboltIP 4.0.3
!A!IPCHPMC 2.0.1
!AMCCSControl 1.14
BridgeAudioCommunication 100.2
!AAVEBridge 6.1
usb.!UHostBillboardDevice 1.0
!UCardReader 511.40.9
BCMWLANFirmware4378.Hashstore 1
BCMWLANFirmware4377.Hashstore 1
BCMWLANFirmware4364.Hashstore 1
BCMWLANFirmware4355.Hashstore 1
@filesystems.tmpfs 1
|!ABCM5701Ethernet 11.0.0
!ABCMWLANBusInterfacePCIeMac 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
!AACPIButtons 6.1
!ASMBIOS 2.1
!AACPIEC 6.1
!AAPIC 1.7
@!ASystemPolicy 2.0.0
@nke.applicationfirewall 310
|IOKitRegistryCompatibility 1
|EndpointSecurity 1
!AActuatorDriver 4400.28
!AHIDKeyboard 222
!AMultitouchDriver 4400.28
!AInputDeviceSupport 4400.35
!AHS!BDriver 4000.27
IO!BHIDDriver 8.0.1f5
@kext.triggers 1.0
@kext.AMDRadeonX6200HWLibs 1.0
|IOAVB!F 900.12
@!AGPUWrangler 6.1.27
@kext.AMDRadeonX6000Framebuffer 4.0.0
@kext.AMDSupport 4.0.0
|IOAccelerator!F2 439.35.4
@plugin.IOgPTPPlugin 900.11
|IOEthernetAVB!C 1.1.0
X86PlatformPlugin 1.0.0
|IOSlowAdaptiveClocking!F 1.0.0
@kext.AMDRadeonX6000HWServices 4.0.0
!ASMBusPCI 1.0.14d1
IOPlatformPlugin!F 6.0.0d8
!AGraphicsControl 6.1.27
@!AGraphicsDeviceControl 6.1.27
|IO!BHost!CUARTTransport 8.0.1f5
|IO!BHost!CTransport 8.0.1f5
|IONDRVSupport 585
|IOGraphics!F 585
!ASMBus!C 1.0.18d1
!UAudio 401.4
|IOAudio!F 300.6.1
@vecLib.kext 1.2.0
!A!ILpssUARTv1 3.0.60
!A!ILpssUARTCommon 3.0.60
!AOnboardSerial 1.0
Core!S 554
usb.!UHub 1.2
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
!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
!AThunderboltNHI 7.2.8
|IOThunderbolt!F 9.3.2
!ABSDKextStarter 3
|IOSurface 289.3
!ABCMWLANCoreMac 1.0.0
|IOSerial!F 11
|IO80211!FV2 1200.12.2b1
|IOSkywalk!F 1
mDNSOffloadUserClient 1.0.1b8
IOImageLoader 1.0.0
corecapture 1.0.4
@filesystems.hfs.encodings.kext 1
|IOUSB!F 900.4.2
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
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