panic(cpu 10 caller 0xffffff7f9f84fad5): userspace watchdog timeout: no successful checkins from com.apple.WindowServer in 120 seconds
service: com.apple.logd, total successful checkins since load (270 seconds ago): 28, last successful checkin: 0 seconds ago
service: com.apple.WindowServer, total successful checkins since load (240 seconds ago): 12, last successful checkin: 120 seconds ago

Backtrace (CPU 10), Frame : Return Address
0xffffff83d5343720 : 0xffffff801e71a65d mach_kernel : _handle_debugger_trap + 0x49d
0xffffff83d5343770 : 0xffffff801e854a75 mach_kernel : _kdp_i386_trap + 0x155
0xffffff83d53437b0 : 0xffffff801e8465fe mach_kernel : _kernel_trap + 0x4ee
0xffffff83d5343800 : 0xffffff801e6c0a40 mach_kernel : _return_from_trap + 0xe0
0xffffff83d5343820 : 0xffffff801e719d27 mach_kernel : _DebuggerTrapWithState + 0x17
0xffffff83d5343920 : 0xffffff801e71a117 mach_kernel : _panic_trap_to_debugger + 0x227
0xffffff83d5343970 : 0xffffff801eec1b28 mach_kernel : _panic_with_thread_context
0xffffff83d53439e0 : 0xffffff7f9f84fad5 com.apple.driver.watchdog : __ZN10IOWatchdog14userspacePanicEP8OSObjectPvP25IOExternalMethodArguments.cold.1 + 0x27
0xffffff83d53439f0 : 0xffffff7f9f84f7fa com.apple.driver.watchdog : __ZN10IOWatchdog35userspaceDisableUserspaceMonitoringEP8OSObjectPvP25IOExternalMethodArguments
0xffffff83d5343a10 : 0xffffff801ee539ce mach_kernel : __ZN12IOUserClient14externalMethodEjP25IOExternalMethodArgumentsP24IOExternalMethodDispatchP8OSObjectPv + 0x1de
0xffffff83d5343a60 : 0xffffff7f9f84ecfe com.apple.driver.watchdog : __ZN20IOWatchdogUserClient14externalMethodEjP25IOExternalMethodArgumentsP24IOExternalMethodDispatchP8OSObjectPv + 0x7c
0xffffff83d5343b60 : 0xffffff801ee5cbf3 mach_kernel : _is_io_connect_method + 0x223
0xffffff83d5343ca0 : 0xffffff801e8035e2 mach_kernel : _iokit_server_routine + 0x4e62
0xffffff83d5343db0 : 0xffffff801e7203c8 mach_kernel : _ipc_kobject_server + 0x238
0xffffff83d5343e10 : 0xffffff801e6f6d15 mach_kernel : _ipc_kmsg_send + 0x135
0xffffff83d5343e70 : 0xffffff801e70db22 mach_kernel : _mach_msg_overwrite_trap + 0x2d2
0xffffff83d5343f00 : 0xffffff801e82c065 mach_kernel : _mach_call_munger64 + 0x205
0xffffff83d5343fa0 : 0xffffff801e6c1226 mach_kernel : _hndl_mach_scall64 + 0x16
      Kernel Extensions in backtrace:
         com.apple.driver.watchdog(1.0)[832CC890-EE61-33E0-8FD4-8D354BCD0921]@0xffffff7f9f84e000->0xffffff7f9f856fff

BSD process name corresponding to current thread: watchdogd
Boot args: debug=0x100 keepsyms=1 alcid=1 npci=0x2000 agdpmod=pikera 

Mac OS version:
19G2021

Kernel version:
Darwin Kernel Version 19.6.0: Thu Jun 18 20:49:00 PDT 2020; root:xnu-6153.141.1~1/RELEASE_X86_64
Kernel UUID: 1D3A0F3D-D908-397B-BD16-8F48C0823A2E
Kernel slide:     0x000000001e400000
Kernel text base: 0xffffff801e600000
__HIB  text base: 0xffffff801e500000
System model name: iMacPro1,1 (Mac-7BA5B2D9E42DDD94)
System shutdown begun: NO
Panic diags file available: YES (0x0)

System uptime in nanoseconds: 272074093739