roundup_power2_divisions not needed with newer pytorch versions (#3540)

* roundup_power2_divisions not needed with newer pytorch versions

* remove typo

* update qwen3.5 moe 35b-a3b yaml for 5090

* more bug fixes

* fix tests to match updated trainer

* don't use fa2 for hooks test

* reset plugins on the instance

* retry download

* fix references to renamed axolotl_cfg property on trainer

* Fix ref to trainer cfg

tests/conftest.py

@@ -1,5 +1,6 @@
 """Shared pytest fixtures"""
 
+import collections
 import functools
 import importlib
 import logging
@@ -473,6 +474,18 @@ def temp_dir() -> Generator[str, None, None]:
     shutil.rmtree(_temp_dir)
 
 
+@pytest.fixture(scope="function", autouse=True)
+def reset_plugin_manager():
+    from axolotl.integrations.base import PluginManager
+
+    yield
+    PluginManager._cfg = None
+    # Don't reset _instance to None — module-level PLUGIN_MANAGER references
+    # in train.py, model.py, etc. would become stale
+    if PluginManager._instance is not None:
+        PluginManager._instance.plugins = collections.OrderedDict()
+
+
 @pytest.fixture(scope="function", autouse=True)
 def torch_manual_seed():
     torch.manual_seed(42)