Add missing device id for pytorch 2.8

src/lightning/fabric/strategies/ddp.py

@@ -212,7 +212,12 @@ def _setup_distributed(self) -> None:
         self._set_world_ranks()
         self._process_group_backend = self._get_process_group_backend()
         assert self.cluster_environment is not None
-        _init_dist_connection(self.cluster_environment, self._process_group_backend, timeout=self._timeout)
+        _init_dist_connection(
+            self.cluster_environment,
+            self._process_group_backend,
+            timeout=self._timeout,
+            device_id=self.root_device if self.root_device.type != "cpu" else None,
+        )
 
     def _get_process_group_backend(self) -> str:
         return self._process_group_backend or _get_default_process_group_backend_for_device(self.root_device)

src/lightning/fabric/strategies/fsdp.py

@@ -663,7 +663,12 @@ def _setup_distributed(self) -> None:
         self._set_world_ranks()
         self._process_group_backend = self._get_process_group_backend()
         assert self.cluster_environment is not None
-        _init_dist_connection(self.cluster_environment, self._process_group_backend, timeout=self._timeout)
+        _init_dist_connection(
+            self.cluster_environment,
+            self._process_group_backend,
+            timeout=self._timeout,
+            device_id=self.root_device if self.root_device.type != "cpu" else None,
+        )
 
     def _get_process_group_backend(self) -> str:
         return self._process_group_backend or _get_default_process_group_backend_for_device(self.root_device)

src/lightning/fabric/strategies/model_parallel.py

@@ -302,7 +302,12 @@ def _setup_distributed(self) -> None:
         self._set_world_ranks()
         self._process_group_backend = self._get_process_group_backend()
         assert self.cluster_environment is not None
-        _init_dist_connection(self.cluster_environment, self._process_group_backend, timeout=self._timeout)
+        _init_dist_connection(
+            self.cluster_environment,
+            self._process_group_backend,
+            timeout=self._timeout,
+            device_id=self.root_device if self.root_device.type != "cpu" else None,
+        )
 
     def _get_process_group_backend(self) -> str:
         return self._process_group_backend or _get_default_process_group_backend_for_device(self.root_device)

src/lightning/pytorch/strategies/ddp.py

@@ -200,7 +200,12 @@ def setup_distributed(self) -> None:
         self.set_world_ranks()
         self._process_group_backend = self._get_process_group_backend()
         assert self.cluster_environment is not None
-        _init_dist_connection(self.cluster_environment, self._process_group_backend, timeout=self._timeout)
+        _init_dist_connection(
+            self.cluster_environment,
+            self._process_group_backend,
+            timeout=self._timeout,
+            device_id=self.root_device if self.root_device.type != "cpu" else None,
+        )
 
     def _get_process_group_backend(self) -> str:
         return self._process_group_backend or _get_default_process_group_backend_for_device(self.root_device)

src/lightning/pytorch/strategies/fsdp.py

@@ -260,7 +260,12 @@ def setup_environment(self) -> None:
 
         self._process_group_backend = self._get_process_group_backend()
         assert self.cluster_environment is not None
-        _init_dist_connection(self.cluster_environment, self._process_group_backend, timeout=self._timeout)
+        _init_dist_connection(
+            self.cluster_environment,
+            self._process_group_backend,
+            timeout=self._timeout,
+            device_id=self.root_device if self.root_device.type != "cpu" else None,
+        )
 
         # if 'device_mesh' in the `kwargs` is provided as a tuple, update it into the `DeviceMesh` object here
         if isinstance(self.kwargs.get("device_mesh"), tuple):

src/lightning/pytorch/strategies/model_parallel.py

@@ -350,7 +350,12 @@ def _setup_distributed(self) -> None:
         self.set_world_ranks()
         self._process_group_backend = self._get_process_group_backend()
         assert self.cluster_environment is not None
-        _init_dist_connection(self.cluster_environment, self._process_group_backend, timeout=self._timeout)
+        _init_dist_connection(
+            self.cluster_environment,
+            self._process_group_backend,
+            timeout=self._timeout,
+            device_id=self.root_device if self.root_device.type != "cpu" else None,
+        )
 
     def _get_process_group_backend(self) -> str:
         return self._process_group_backend or _get_default_process_group_backend_for_device(self.root_device)