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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 basenano 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 4000.27X86PlatformShim 1.0.0AGPM 119!APlatformEnabler 2.7.0d0AudioAUUC 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 3.6.8eficheck 1!A!IKBLGraphicsFramebuffer 16.0.0 @AGDCPluginDisplayMetrics 6.1.27pmtelemetry 1LuaHardwareAccess 1.0.16 |IOUserEthernet 1.0.1 |IO!BSerialManager 8.0.1f5 @DontStealMacOS_X 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 1.9.0AirPort.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 4000.27IO!BHIDDriver 8.0.1f5 @kext.triggers 1.0 @kext.AMDRadeonX4200HWLibs 1.0 @kext.AMDRadeonX4000HWServices 4.0.0DspFuncLib 283.15 @kext.OSvKernDSPLib 529!AGraphicsControl 6.1.27X86PlatformPlugin 1.0.0IOPlatformPlugin!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 1.0.18d1usb.!UHub 1.2usb.networking 5.0.0usb.!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 1mDNSOffloadUserClient 1.0.1b8corecapture 1.0.4 |IONVMe!F 2.1.0!A!ILpssI2C 3.0.60usb.!UXHCIPCI 1.2usb.!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 3.4DiskImages 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 1.0KernelRelayHost 1 |IOUSBHost!F 1.2!UHostMergeProperties 1.2usb.!UCommon 1.0!ABusPower!C 1.0!ASEPManager 1.0.1IOSlaveProcessor 1!AACPIPlatform 6.1!ASMC 3.1.9 |IOPCI!F 2.9 |IOACPI!F 1.4watchdog 1 @kec.pthread 1 @kec.corecrypto 1.0 @kec.Libm 1