panic(cpu 0 caller 0xffffff800924f05a): "UPSB(iMac18,3): thunderbolt power on failed 0xffffffff\n"@/AppleInternal/BuildRoot/Library/Caches/com.apple.xbs/Sources/IOPCIFamily/IOPCIFamily-428.60.7/IOPCIBridge.cpp:1428
Backtrace (CPU 0), Frame : Return Address
0xffffffb09352b9e0 : 0xffffff80068b9aed 
0xffffffb09352ba30 : 0xffffff80069fc6e3 
0xffffffb09352ba70 : 0xffffff80069ecd1a 
0xffffffb09352bac0 : 0xffffff800685ea2f 
0xffffffb09352bae0 : 0xffffff80068b938d 
0xffffffb09352bc00 : 0xffffff80068b9678 
0xffffffb09352bc70 : 0xffffff80070be3ca 
0xffffffb09352bce0 : 0xffffff800924f05a 
0xffffffb09352bd00 : 0xffffff80092356b7 
0xffffffb09352bd60 : 0xffffff8009235bfb 
0xffffffb09352bd80 : 0xffffff8009233d6c 
0xffffffb09352bdd0 : 0xffffff800923eafb 
0xffffffb09352bdf0 : 0xffffff8006ffc1b1 
0xffffffb09352be60 : 0xffffff8006ffbf4a 
0xffffffb09352be80 : 0xffffff80068fe6b5 
0xffffffb09352bef0 : 0xffffff80068ff5c4 
0xffffffb09352bfa0 : 0xffffff800685e13e 
      Kernel Extensions in backtrace:
         com.apple.iokit.IOPCIFamily(2.9)[D0F1BFB8-C28E-3E70-891B-73B783189394]@0xffffff800922c000->0xffffff8009253fff

Process name corresponding to current thread: kernel_task

Mac OS version:
20C69

Kernel version:
Darwin Kernel Version 20.2.0: Wed Dec  2 20:39:59 PST 2020; root:xnu-7195.60.75~1/RELEASE_X86_64
Kernel UUID: 82E2050C-5936-3D24-AD3B-EC4EC5C09E11
KernelCache slide: 0x0000000006600000
KernelCache base:  0xffffff8006800000
Kernel slide:      0x0000000006610000
Kernel text base:  0xffffff8006810000
__HIB  text base: 0xffffff8006700000
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: 180749833807
Last Sleep:           absolute           base_tsc          base_nano
  Uptime  : 0x0000002a15879857
  Sleep   : 0x000000227f037d74 0x000000100b340844 0x0000000000000000
  Wake    : 0x0000002298ffc0dc 0x00000000a0609e98 0x0000002297df0ca3
last started kext at 149136887698: >!UAudio	401.4 (addr 0xffffff7fa6d0f000, size 307200)
last stopped kext at 135002207608: >usb.!UHostPacketFilter	1.0 (addr 0xffffff800965b000, size 8192)
loaded kexts:
>usb.!UUserHCI	1
>!ATopCaseHIDEventDriver	4020.6
>AudioAUUC	1.70
>X86PlatformShim	1.0.0
>AGPM	119
>!APlatformEnabler	2.7.0d0
@fileutil	20.036.15
@filesystems.autofs	3.0
>!AUpstreamUserClient	3.6.8
@kext.AMDFramebuffer	4.0.2
@filesystems.ntfs	3.14.3
>!AHDA	283.15
@kext.AMDRadeonX4000	4.0.2
>!A!IPCHPMC	2.0.1
@kext.AMDRadeonServiceManager	4.0.2
>!A!IKBLGraphics	16.0.1
>!AMCCSControl	1.14
>!ASMCLMU	212
>eficheck	1
>!AGraphicsDevicePolicy	6.2.2
@AGDCPluginDisplayMetrics	6.2.2
>pmtelemetry	1
>LuaHardwareAccess	1.0.16
|IOUserEthernet	1.0.1
|IO!BSerialManager	8.0.2f9
@Dont_Steal_Mac_OS_X	7.0.0
>!AHV	1
>!ADiskImages2	1
>!A!ISlowAdaptiveClocking	4.0.0
>!A!IKBLGraphicsFramebuffer	16.0.1
>!AThunderboltIP	4.0.3
>!AGFXHDA	100.1.431
|Broadcom!B20703USBTransport	8.0.2f9
@kext.AMD9500!C	4.0.2
@filesystems.tmpfs	1
@filesystems.hfs.kext	556.60.1
@BootCache	40
@!AFSCompression.!AFSCompressionTypeZlib	1.0.0
@!AFSCompression.!AFSCompressionTypeDataless	1.0.0d1
@filesystems.apfs	1677.60.23
>!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
>!UAudio	401.4
>usb.cdc	5.0.0
>!AHIDKeyboard	222
>!AMultitouchDriver	4400.28
>!AInputDeviceSupport	4400.35
>!AHS!BDriver	4020.6
>IO!BHIDDriver	8.0.2f9
@kext.triggers	1.0
@kext.AMDRadeonX4200HWLibs	1.0
>DspFuncLib	283.15
@kext.OSvKernDSPLib	529
@kext.AMDRadeonX4000HWServices	4.0.2
>!AGraphicsControl	6.2.2
>!ASMBus!C	1.0.18d1
|IOSerial!F	11
|IOAVB!F	900.12
>!ASMBusPCI	1.0.14d1
@!AGPUWrangler	6.2.2
|IOSlowAdaptiveClocking!F	1.0.0
>X86PlatformPlugin	1.0.0
>IOPlatformPlugin!F	6.0.0d8
|IOAccelerator!F2	439.52
>!AHDA!C	283.15
|IOHDA!F	283.15
|IONDRVSupport	585
|IOAudio!F	300.6.1
@vecLib.kext	1.2.0
|Broadcom!BHost!CUSBTransport	8.0.2f9
|IO!BHost!CUSBTransport	8.0.2f9
|IO!BHost!CTransport	8.0.2f9
@kext.AMDSupport	4.0.2
@!AGraphicsDeviceControl	6.2.2
|IOGraphics!F	585
@plugin.IOgPTPPlugin	900.11
|IOEthernetAVB!C	1.1.0
>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
|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	8.0.2f9
|IOReport!F	47
|IO!BPacketLogger	8.0.2f9
$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	11.1
@kec.Libm	1