Here is an error I got.
panic(cpu 2 caller 0xffffff7f948a9ad5): userspace watchdog timeout: no successful checkins from com.apple.WindowServer in 120 seconds
service: com.apple.logd, total successful checkins since load (1800 seconds ago): 181, last successful checkin: 0 seconds ago
service: com.apple.WindowServer, total successful checkins since load (1770 seconds ago): 165, last successful checkin: 120 seconds ago
Backtrace (CPU 2), Frame : Return Address
0xffffff8dd50a3720 : 0xffffff801371868d
0xffffff8dd50a3770 : 0xffffff8013852ab5
0xffffff8dd50a37b0 : 0xffffff801384463e
0xffffff8dd50a3800 : 0xffffff80136bea40
0xffffff8dd50a3820 : 0xffffff8013717d57
0xffffff8dd50a3920 : 0xffffff8013718147
0xffffff8dd50a3970 : 0xffffff8013ebf328
0xffffff8dd50a39e0 : 0xffffff7f948a9ad5
0xffffff8dd50a39f0 : 0xffffff7f948a97fa
0xffffff8dd50a3a10 : 0xffffff8013e511ce
0xffffff8dd50a3a60 : 0xffffff7f948a8cfe
0xffffff8dd50a3b60 : 0xffffff8013e5a3f3
0xffffff8dd50a3ca0 : 0xffffff8013801622
0xffffff8dd50a3db0 : 0xffffff801371e3f8
0xffffff8dd50a3e10 : 0xffffff80136f4d35
0xffffff8dd50a3e70 : 0xffffff801370bb52
0xffffff8dd50a3f00 : 0xffffff801382a0a5
0xffffff8dd50a3fa0 : 0xffffff80136bf226
Kernel Extensions in backtrace:
com.apple.driver.watchdog(1.0)[B6A95892-6C75-3CF5-A6CC-6D83F30FA1D5]@0xffffff7f948a8000->0xffffff7f948b0fff
BSD process name corresponding to current thread: watchdogd
Mac OS version:
19H15
Kernel version:
Darwin Kernel Version 19.6.0: Thu Oct 29 22:56:45 PDT 2020; root:xnu-6153.141.2.2~1/RELEASE_X86_64
Kernel UUID: 9B5A7191-5B84-3990-8710-D9BD9273A8E5
Kernel slide: 0x0000000013400000
Kernel text base: 0xffffff8013600000
__HIB text base: 0xffffff8013500000
System model name: MacPro6,1 (Mac-F60DEB81FF30ACF6)
System shutdown begun: NO
Panic diags file available: YES (0x0)
System uptime in nanoseconds: 1810090597368
last loaded kext at 124612370857: @filesystems.smbfs 3.4.4 (addr 0xffffff7f97f88000, size 450560)
last unloaded kext at 142887677170: >usb.!UHostPacketFilter 1.0 (addr 0xffffff7f94dbc000, size 24576)
loaded kexts:
com.ATTO.driver.ATTOThunderLinkNC 2.13.0
@filesystems.smbfs 3.4.4
@fileutil 20.036.15
>AGPM 111.4.4
>!APlatformEnabler 2.7.0d0
>X86PlatformShim 1.0.0
@filesystems.autofs 3.0
>!AHDA 283.15
>!AUpstreamUserClient 3.6.8
>!AMCCSControl 1.14
@kext.AMDFramebuffer 3.1.0
@kext.AMDRadeonX4000 3.1.0
@kext.AMDRadeonServiceManager 3.1.0
>!AGraphicsDevicePolicy 5.2.6
@AGDCPluginDisplayMetrics 5.2.6
>!AHV 1
|IOUserEthernet 1.0.1
|IO!BSerialManager 7.0.6f7
>pmtelemetry 1
@Dont_Steal_Mac_OS_X 7.0.0
>!AMGPUPowerControl 5.2.6
>!A!ISlowAdaptiveClocking 4.0.0
>!AFWOHCI 5.6.2
>eficheck 1
>!AThunderboltIP 3.1.4
>!A!IMCEReporter 115
@kext.AMD7000!C 3.1.0
>AudioAUUC 1.70
>!ALPC 3.1
>!UDisplays 380
>!AVirtIO 1.0
@filesystems.hfs.kext 522.100.5
@!AFSCompression.!AFSCompressionTypeDataless 1.0.0d1
@BootCache 40
@!AFSCompression.!AFSCompressionTypeZlib 1.0.0
@filesystems.apfs 1412.141.1
>AirPort.BrcmNIC 1400.1.1
>!AAHCIPort 341.140.1
|!ABCM5701Ethernet 10.3.5
@private.KextAudit 1.0
>!AACPIButtons 6.1
>!AACPIEC 6.1
>!ARTC 2.0
>!AHPET 1.8
>!ASMBIOS 2.1
>!AAPIC 1.7
>!A!ICPUPowerManagementClient 222.0.0
$!AImage4 1
@nke.applicationfirewall 303
$TMSafetyNet 8
@!ASystemPolicy 2.0.0
>!A!ICPUPowerManagement 222.0.0
|EndpointSecurity 1
@kext.triggers 1.0
|IOFireWireIP 2.3.0
>DspFuncLib 283.15
@kext.OSvKernDSPLib 529
>!ASMBus!C 1.0.18d1
@kext.AMDRadeonX4030HWLibs 1.0
|IOAccelerator!F2 438.7.3
@kext.AMDRadeonX4000HWServices 3.1.0
|IOAVB!F 850.1
>!ABacklightExpert 1.1.0
|IONDRVSupport 576.1
>!AGraphicsControl 5.2.6
@!AGPUWrangler 5.2.6
|IOSlowAdaptiveClocking!F 1.0.0
>!AHDA!C 283.15
|IOHDA!F 283.15
|IOFireWire!F 4.7.5
>X86PlatformPlugin 1.0.0
@kext.AMDSupport 3.1.0
@!AGraphicsDeviceControl 5.2.6
|IOGraphics!F 576.1
>IOPlatformPlugin!F 6.0.0d8
@plugin.IOgPTPPlugin 840.3
|Broadcom!BHost!CUSBTransport 7.0.6f7
|IO!BHost!CUSBTransport 7.0.6f7
|IO!BHost!CTransport 7.0.6f7
|IO!B!F 7.0.6f7
|IO!BPacketLogger 7.0.6f7
>usb.IOUSBHostHIDDevice 1.2
>!UAudio 323.4
>usb.networking 5.0.0
>usb.!UHostCompositeDevice 1.2
>usb.!UHub 1.2
|IOAudio!F 300.2
@vecLib.kext 1.2.0
|IOSerial!F 11
|IOSurface 269.11
@filesystems.hfs.encodings.kext 1
>!AThunderboltDPOutAdapter 6.2.6
>!AThunderboltPCIUpAdapter 2.5.4
>!AThunderboltDPInAdapter 6.2.6
>!AThunderboltDPAdapter!F 6.2.6
>!AThunderboltPCIDownAdapter 2.5.4
|IOSCSIParallel!F 3.0.0
>!AThunderboltNHI 5.8.6
|IOThunderbolt!F 7.6.1
|IOAHCIBlock!S 316.100.5
|IO80211!F 1200.12.2b1
>corecapture 1.0.4
|IOSkywalk!F 1
|IOAHCI!F 290.0.1
|IOEthernetAVB!C 1.1.0
>mDNSOffloadUserClient 1.0.1b8
>usb.!UXHCIPCI 1.2
>usb.!UXHCI 1.2
>usb.!UEHCIPCI 1.2
>usb.!UEHCI 1.2
|IOUSB!F 900.4.2
>!AEFINVRAM 2.1
>!AEFIRuntime 2.1
|IOSMBus!F 1.1
|IOHID!F 2.0.0
$quarantine 4
$sandbox 300.0
@Kext.!AMatch 1.0.0d1
>DiskImages 493.0.0
>!AFDEKeyStore 28.30
>!AEffaceable!S 1.0
>!ASSE 1.0
>!AKeyStore 2
>!UTDM 489.120.1
|IOSCSIBlockCommandsDevice 422.120.3
>!ACredentialManager 1.0
>KernelRelayHost 1
>!ASEPManager 1.0.1
>IOSlaveProcessor 1
|IOUSBMass!SDriver 157.140.1
|IOSCSIArchitectureModel!F 422.120.3
|IO!S!F 2.1
|IOUSBHost!F 1.2
>!UHostMergeProperties 1.2
>usb.!UCommon 1.0
>!ABusPower!C 1.0
|CoreAnalytics!F 1
>!AMobileFileIntegrity 1.0.5
@kext.CoreTrust 1
|IOTimeSync!F 840.3
|IONetworking!F 3.4
|IOReport!F 47
>!AACPIPlatform 6.1
>!ASMC 3.1.9
>watchdog 1
|IOPCI!F 2.9
|IOACPI!F 1.4
@kec.pthread 1
@kec.corecrypto 1.0
@kec.Libm 1