ChuckandClaude Opus 5.5 64c7289593 feat(display): systemd watchdog and heartbeat for a frozen render loop (#687) ...

If the render loop gets stuck inside a plugin's display(), ledmatrix.service
stays active and the panel stays frozen. This adds a way to detect that.

- src/display_watchdog.py (standard library only) sends sd_notify over
  $NOTIFY_SOCKET and writes /run/ledmatrix/display-heartbeat.json. Only the
  render thread counts: beats from other threads are ignored.
- ledmatrix.service: WatchdogSec=120, NotifyAccess=main,
  RuntimeDirectory=ledmatrix (0755), RestartSteps=4 and
  RestartMaxDelaySec=2min. It stays Type=simple. run.py widens the watchdog
  to 15 min for start-up, and load_plugin() does the same on the render
  thread. The loop arms after its first frame.
- /api/v3/health adds checks.display_loop: running, stalled (no heartbeat
  for over 60s, which makes the status degraded) or not_reported. With web
  login on, a caller who is not logged in still gets only healthy/degraded,
  and a stall degrades that answer.
- The update verifier requires a fresh heartbeat from the restarted display
  when the display it replaced was writing one. A frozen panel is rolled
  back.
- Existing installs get the systemd watchdog only after install_service.sh
  is re-run. The heartbeat works right away.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

2026-09-30 11:15:31 -04:00

..

testing

ci: mypy ratchet -- keep type-clean modules clean (71 modules, 536 -> 442 errors) (#661)

2026-09-28 15:01:35 -04:00

__init__.py

refactor: delete dead Python code in the core (and stop storing Wi-Fi passwords) (#608)

2026-09-23 12:36:26 -04:00

base_plugin.py

feat(vegas): one declared participation per plugin (scroll | pause | exclude) (#682)

2026-09-30 09:30:37 -04:00

compatibility.py

ci: mypy ratchet -- keep type-clean modules clean (71 modules, 536 -> 442 errors) (#661)

2026-09-28 15:01:35 -04:00

operation_history.py

fix(plugin-system): load/enable failures, atomic state files, pip lock, test-double parity (#645)

2026-09-28 08:25:45 -04:00

operation_queue.py

fix(plugin-system): unload/update race, failed-load cleanup, limits validation, schema lookup, install rollback (#653)

2026-09-28 10:41:40 -04:00

operation_types.py

fix: Codacy security fixes, CVE dependency bumps, and code quality cleanup (#331)

2026-05-15 10:19:55 -04:00

plugin_catalog.py

refactor(web): read plugins through a PluginCatalog; only the display runs them (#688)

2026-09-30 10:39:44 -04:00

plugin_dirs.py

ci: mypy ratchet -- keep type-clean modules clean (71 modules, 536 -> 442 errors) (#661)

2026-09-28 15:01:35 -04:00

plugin_executor.py

fix(plugins): one hung plugin no longer stops every plugin from updating (#677)

2026-09-30 09:10:41 -04:00

plugin_health.py

fix(plugins): one hung plugin no longer stops every plugin from updating (#677)

2026-09-30 09:10:41 -04:00

plugin_loader.py

fix(plugins): put a (re)loading plugin's directory first on sys.path (#663)

2026-09-28 15:02:01 -04:00

plugin_manager.py

feat(display): systemd watchdog and heartbeat for a frozen render loop (#687)

2026-09-30 11:15:31 -04:00

plugin_runtime.py

refactor(plugins): the display publishes plugin runtime state; retire plugin_state.json (#690)

2026-09-30 10:48:14 -04:00

plugin_state.py

refactor(plugins): the display publishes plugin runtime state; retire plugin_state.json (#690)

2026-09-30 10:48:14 -04:00

repo_urls.py

fix(plugins): store and plugin-manager bugs; tidy src/plugin_system (#635)

2026-09-24 17:32:02 -04:00

resource_monitor.py

ci: mypy ratchet -- keep type-clean modules clean (71 modules, 536 -> 442 errors) (#661)

2026-09-28 15:01:35 -04:00

saved_repositories.py

ci: mypy ratchet -- keep type-clean modules clean (71 modules, 536 -> 442 errors) (#661)

2026-09-28 15:01:35 -04:00

schema_manager.py

feat(vegas): one declared participation per plugin (scroll | pause | exclude) (#682)

2026-09-30 09:30:37 -04:00

state_reconciliation.py

refactor(plugins): the display publishes plugin runtime state; retire plugin_state.json (#690)

2026-09-30 10:48:14 -04:00

store_install.py

feat(store): read ledmatrix_min_version, aliases and commit from the registry (#686)

2026-09-30 09:31:16 -04:00

store_manager.py

feat(store): read ledmatrix_min_version, aliases and commit from the registry (#686)

2026-09-30 09:31:16 -04:00

store_registry.py

feat(store): read ledmatrix_min_version, aliases and commit from the registry (#686)

2026-09-30 09:31:16 -04:00

store_update.py

feat(store): read ledmatrix_min_version, aliases and commit from the registry (#686)

2026-09-30 09:31:16 -04:00