I have the same issue. I receive a new mac pro 2019 (i9, 32gb, radeon 5500M) and as soon as I connect an external monitor the mac freezees completely and reboot after a few minutes. Cannot work like this. The report first page I get is below. This issue is not present in my mac pro 2018 (i7,32g, radeon 555) Process: WindowServer [-1] Path: ??? Identifier: WindowServer Version: ??? Code Type: 00000000 (Native) Parent Process: ??? [Unknown] User ID: Date/Time: 2022-08-29 13:56:01.9179 -0300 OS Version: macOS 12.5.1 (21G83) Report Version: 12 Anonymous UUID: 3DD382A7-F75E-0EA9-EF93-4C3BEC62685C System Integrity Protection: Notes: This is a watchdog-triggered termination event, and not expected to be well-represented in the legacy crash format Crashed Thread: Unknown Exception Type: Termination Reason: Namespace WATCHDOG, Code 1 monitoring timed out for service (1 monitored services unresponsive): checkin with service: WindowServer failed to send ping message, WindowServer watchdog request handling code likely hung 80 seconds since last successful checkin, 657 total successsful checkins since load, 39 seconds since last crashed by watchdogd, (1 induced crashes) Error Formulating Crash Report: This is a watchdog-triggered termination event, and not expected to be well-represented in the legacy crash format Backtrace not available No thread state (register information) available Binary Images: Binary images description not available Full Report {"bundleID":"WindowServer","timestamp":"2022-08-29 13:56:01.00 -0300","os_version":"macOS 12.5.1 (21G83)","incident_id":"022F09A4-2686-451C-BCA9-4484CD9F2580","share_with_app_devs":0,"bug_type":"309","app_name":"WindowServer","name":"WindowServer"} { "deployVersion" : 210, "variant" : "stackshot", "incident" : "022F09A4-2686-451C-BCA9-4484CD9F2580", "crashReporterKey" : "3DD382A7-F75E-0EA9-EF93-4C3BEC62685C", "modelCode" : "MacBookPro16,1", "cpuType" : "00000000", "osVersion" : { "train" : "macOS 12.5.1", "build" : "21G83", "releaseType" : "User" }, "variantVersion" : 2, "captureTime" : "2022-08-29 13:56:01.9179 -0300", "pid" : -1, "procName" : "WindowServer", "bundleInfo" : {"CFBundleIdentifier":"WindowServer"}, "termination" : {"flags":0,"indicator":"monitoring timed out for service","code":1,"namespace":"WATCHDOG","details":["(1 monitored services unresponsive): checkin with service: WindowServer failed to send ping message, WindowServer watchdog request handling code likely hung 80 seconds since last successful checkin, 657 total successsful checkins since load, 39 seconds since last crashed by watchdogd, (1 induced crashes)"]}, "stackshot" : { "processByPid" : { "0" : {"timesThrottled":0,"turnstileInfo":["thread 109: blocked on 2298, hops: 1, priority: 92","thread 2297: blocked on 86015, hops: 1, priority: 92","thread 2298: blocked on 2297, hops: 1, priority: 92","thread 86962: blocked on 2298, hops: 1, priority: 92"],"pageIns":246,"waitInfo":["thread 109: kernel mutex 0xbe616c96f1e9f711 owned by thread 2298","thread 2297: kernel mutex 0xbe616ca087bf3821 owned by thread 86015","thread 2298: kernel mutex 0xbe616ca087bf0681 owned by thread 2297","thread 86962: kernel mutex 0xbe616c96f1e9f711 owned by thread 2298"],"timesDidThrottle":0,"procname":"kernel_task","copyOnWriteFaults":8244,"threadById":{"112":{"continuation":[0,1338336],"userTime":0,"systemTime":1.468e-06,"id":112,"basePriority":31,"name":"VM_pageout_garbage_collect","user_usec":0,"schedPriority":31,"system_usec":1,"state":["TH_WAIT","TH_UNINT"],"waitEvent":[0,1338336]},"113":{"continuation":[0,568288],"userTime":0,"systemTime":9.8414999999999999e-05,"id":113,"basePriority":63,"name":"daemon.core-analytics-events","user_usec":0,"schedPriority":63,"system_usec":98,"state":["TH_WAIT","TH_UNINT"],"waitEvent":[0,17495864]},"174":{"userTime":0,"systemTime":6321.3300071809999,"system_usec":6321330007,"id":174,"basePriority":0,"user_usec":0,"kernelFrames":[[0,1846048],[0,653418],[0,653929],[0,61854]],"schedPriority":0,"name":"idle #10","state":["TH_RUN","TH_IDLE"]},"240":{"continuation":[0,8596736],"userTime":0,"systemTime":2.5390000000000002e-06,"id":240,"basePriority":81,"name":"AppleACPIButton","user_usec":0,"schedPriority":81,"system_usec":2,"state":["TH_WAIT","TH_UNINT"],"waitEvent":[1,13718365294252224889]},"75374":{"id":75374,"schedPriority":81,"system_usec":450763,"state":["TH_WAIT"],"schedFlags":["TH_SFLAG_EAGERPREEMPT"],"user_usec":0,"basePriority":81,"userTime":0,"waitEvent":[0,1523