AFTER - ff6eed3ff9
Observed runtime output (not app UI)
Linux x86_64 / Electron 44.10.1 / X11 / 1280x800
Fresh HOME, XDG config and T3 home; no seeded data.

1. Launch real bundled Electron; wait for backend ready.
2. Wait 15 seconds; capture two identical frames 500ms apart.
3. Record 5 seconds, then terminate the private Xvfb.

Electron launcher exit status: 1
Main exited 0.788s after display termination began.
GPU stderr: X connection error received.
Observed descendants before display loss: 6
Descendant states at main exit: {"105399": "gone", "105400": "gone", "105533": "gone", "105543": "gone", "105603": "gone", "105690": "gone"}
Desktop lifecycle trace names:
  desktop.lifecycle.register
  desktop.lifecycle.exit
Exit trace attributes: {"exitCode": 0, "quitPhase": "running", "killedChildPids": []}
ERROR: desktop main process exiting before shutdown completed
Caveat: callback exitCode=0 differs from launcher status=1.
Backend server.shutdown began 0.034s after first X error.

Scope: unpackaged Electron; AppImage unmount/SIGBUS not reproduced.
The application still exits after losing its display.

Driver timeline:
[
  {
    "seconds": 0.057,
    "event": "electron launched",
    "pid": 105370,
    "viewport": "1280x800",
    "seed": "fresh empty state"
  },
  {
    "seconds": 13.838,
    "event": "backend ready"
  },
  {
    "seconds": 29.591,
    "event": "stable screenshot",
    "identicalFrames": 2,
    "separationMs": 500
  },
  {
    "seconds": 34.612,
    "event": "before display loss",
    "mainRunning": true,
    "directChildren": [
      105399,
      105400,
      105543,
      105690
    ],
    "descendants": [
      105399,
      105400,
      105533,
      105543,
      105603,
      105690
    ]
  },
  {
    "seconds": 34.68,
    "event": "private Xvfb stopped"
  },
  {
    "seconds": 35.4,
    "event": "electron exited",
    "exitCode": 1,
    "childStates": {
      "105399": "gone",
      "105400": "gone",
      "105533": "gone",
      "105543": "gone",
      "105603": "gone",
      "105690": "gone"
    }
  },
  {
    "seconds": 38.401,
    "event": "three seconds after exit",
    "childStates": {
      "105399": "gone",
      "105400": "gone",
      "105533": "gone",
      "105543": "gone",
      "105603": "gone",
      "105690": "gone"
    }
  },
  {
    "seconds": 38.457,
    "event": "lifecycle records",
    "count": 2
  }
]

Lifecycle records:
[
  {
    "type": "effect-span",
    "name": "desktop.lifecycle.register",
    "traceId": "1d6d12f561973178bd502a1c1f3af9de",
    "spanId": "37127b0e6b7d12f6",
    "parentSpanId": "13802226de1986ee",
    "sampled": true,
    "kind": "internal",
    "startTimeUnixNano": "1794477024049788901",
    "endTimeUnixNano": "1794477024050277463",
    "durationMs": 0.488562,
    "attributes": {},
    "events": [],
    "links": [],
    "exit": {
      "_tag": "Success"
    }
  },
  {
    "type": "effect-span",
    "name": "desktop.lifecycle.exit",
    "traceId": "1d6d12f561973178bd502a1c1f3af9de",
    "spanId": "d70794afe9c19c5b",
    "parentSpanId": "37127b0e6b7d12f6",
    "sampled": true,
    "kind": "internal",
    "startTimeUnixNano": "1794477056708120151",
    "endTimeUnixNano": "1794477057426195028",
    "durationMs": 718.074877,
    "attributes": {
      "exitCode": 0,
      "quitPhase": "running",
      "killedChildPids": []
    },
    "events": [],
    "links": [],
    "exit": {
      "_tag": "Success"
    }
  }
]
Captured stderr excerpt:
[105533:1112/095056.700651:ERROR:ui/gfx/x/connection.cc:66] X connection error received.
[105533:1112/095056.700932:ERROR:ui/gfx/x/connection.cc:66] X connection error received.
[09:50:56.708] ERROR (#699): desktop main process exiting before shutdown completed
  scope: desktop
  component: desktop-lifecycle
  exitCode: 0
  quitPhase: running

Captured backend shutdown trace:
[
  {
    "type": "effect-span",
    "name": "server.shutdown",
    "traceId": "e2b7cd9be12759832acf87750ffffaed",
    "spanId": "151c87d8460584c4",
    "parentSpanId": "a9ad451490700305",
    "sampled": true,
    "kind": "internal",
    "startTimeUnixNano": "1794477056734974821",
    "endTimeUnixNano": "1794477056740930358",
    "durationMs": 5.955537,
    "attributes": {},
    "events": [],
    "links": [],
    "exit": {
      "_tag": "Success"
    }
  }
]