Also have exact same issue but with 2017 iMac after installing Big Sur 11.0.1
Mrtina
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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 basenano
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 3.0AGPM 119X86PlatformShim 1.0.0
@kext.AMDFramebuffer 4.0.0!AGraphicsDevicePolicy 6.1.27
@DontStealMacOSX 7.0.0AGDCBacklightControl 6.1.27
|Broadcom!B20703USBTransport 8.0.1f5!ABacklight 180.3!AMCCSControl 1.14!A!IPCHPMC 2.0.1ACPISMC_PlatformPlugin 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 11.0.0AirPort.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!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 1.0.18d1IOPlatformPluginLegacy 1.0.0X86PlatformPlugin 1.0.0IOPlatformPlugin!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 585usb.IOUSBHostHIDDevice 1.2usb.cdc 5.0.0usb.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!AXsanScheme 3
|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 3.0.60!A!ILpssGspi 3.0.60usb.!UXHCIPCI 1.2usb.!UXHCI 1.2
|IOAHCI!F 294usb.!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 3.4DiskImages 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