panic(cpu 10 caller 0xffffff7f9c009ad5): userspace watchdog timeout: no successful checkins from com.apple.WindowServer in 120 seconds
service: com.apple.logd, total successful checkins since wake (7560 seconds ago): 757, last successful checkin: 0 seconds ago
service: com.apple.WindowServer, total successful checkins since wake (7560 seconds ago): 745, last successful checkin: 120 seconds ago

Backtrace (CPU 10), Frame : Return Address
0xffffff922a363820 : 0xffffff801ab3bb2b
0xffffff922a363870 : 0xffffff801ac734d5
0xffffff922a3638b0 : 0xffffff801ac64f4e
0xffffff922a363900 : 0xffffff801aae2a40
0xffffff922a363920 : 0xffffff801ab3b217
0xffffff922a363a20 : 0xffffff801ab3b5fb
0xffffff922a363a70 : 0xffffff801b2d2b25
0xffffff922a363ae0 : 0xffffff7f9c009ad5
0xffffff922a363af0 : 0xffffff7f9c0097e6
0xffffff922a363b10 : 0xffffff801b26739b
0xffffff922a363b60 : 0xffffff801b270443
0xffffff922a363ca0 : 0xffffff801ac22d12
0xffffff922a363db0 : 0xffffff801ab419d8
0xffffff922a363e10 : 0xffffff801ab18635
0xffffff922a363e70 : 0xffffff801ab2f0e5
0xffffff922a363f00 : 0xffffff801ac4b575
0xffffff922a363fa0 : 0xffffff801aae3226
      Kernel Extensions in backtrace:
         com.apple.driver.watchdog(1.0)[053A5D15-51D4-3E61-978B-EB435FA4BD0A]@0xffffff7f9c008000->0xffffff7f9c010fff

BSD process name corresponding to current thread: watchdogd
Boot args: npci=0x2000 alcid=11

Mac OS version:
19D76

Kernel version:
Darwin Kernel Version 19.3.0: Thu Jan  9 20:58:23 PST 2020; root:xnu-6153.81.5~1/RELEASE_X86_64
Kernel UUID: A8DDE75C-CD97-3C37-B35D-1070CC50D2CE
Kernel slide:     0x000000001a800000
Kernel text base: 0xffffff801aa00000
__HIB  text base: 0xffffff801a900000
System model name: iMac18,3 (Mac-BE088AF8C5EB4FA2)
System shutdown begun: NO
Panic diags file available: YES (0x0)

System uptime in nanoseconds: 8342083365380