Stable Diffusion WebUI Forge - Neo breaks when updating torch 2.8.0+cu128 to 2.9.1+cu130 #1513
Description
Package
Stable Diffusion WebUI Forge - Neo
When did the issue occur?
Updating the Package
What GPU / hardware type are you using?
Nvidia 5070 Ti
What happened?
Forge Neo package in Stability Matrix uses torch 2.8.0+cu128. After trying to update to 2.9.1+cu130 with --reinstall-torch Forge Neo breaks. Forge Neo standalone installation works fine with 2.9.1+cu130. Tested with Python 3.11.13 and 3.12.11, same results.
Console output
Python 3.12.11 (main, Jul 23 2025, 00:32:20) [MSC v.1944 64 bit (AMD64)]
Version: neo
Installing torch and torchvision
Looking in indexes: https://pypi.org/simple, https://download.pytorch.org/whl/cu130
Collecting torch==2.9.1+cu130
Downloading https://download.pytorch.org/whl/cu130/torch-2.9.1%2Bcu130-cp312-cp312-win_amd64.whl.metadata (29 kB)
Collecting torchvision==0.24.1+cu130
Downloading https://download.pytorch.org/whl/cu130/torchvision-0.24.1%2Bcu130-cp312-cp312-win_amd64.whl.metadata (6.1 kB)
Requirement already satisfied: filelock in d:\ai\data\packages\stable diffusion webui forge - neo\venv\lib\site-packages (from torch==2.9.1+cu130) (3.20.0)
Requirement already satisfied: typing-extensions>=4.10.0 in d:\ai\data\packages\stable diffusion webui forge - neo\venv\lib\site-packages (from torch==2.9.1+cu130) (4.15.0)
Requirement already satisfied: sympy>=1.13.3 in d:\ai\data\packages\stable diffusion webui forge - neo\venv\lib\site-packages (from torch==2.9.1+cu130) (1.14.0)
Requirement already satisfied: networkx>=2.5.1 in d:\ai\data\packages\stable diffusion webui forge - neo\venv\lib\site-packages (from torch==2.9.1+cu130) (3.6.1)
Requirement already satisfied: jinja2 in d:\ai\data\packages\stable diffusion webui forge - neo\venv\lib\site-packages (from torch==2.9.1+cu130) (3.1.6)
Requirement already satisfied: fsspec>=0.8.5 in d:\ai\data\packages\stable diffusion webui forge - neo\venv\lib\site-packages (from torch==2.9.1+cu130) (2025.12.0)
Requirement already satisfied: setuptools in d:\ai\data\packages\stable diffusion webui forge - neo\venv\lib\site-packages (from torch==2.9.1+cu130) (69.5.1)
Requirement already satisfied: numpy in d:\ai\data\packages\stable diffusion webui forge - neo\venv\lib\site-packages (from torchvision==0.24.1+cu130) (1.26.4)
Requirement already satisfied: pillow!=8.3.*,>=5.3.0 in d:\ai\data\packages\stable diffusion webui forge - neo\venv\lib\site-packages (from torchvision==0.24.1+cu130) (12.0.0)
Requirement already satisfied: mpmath<1.4,>=1.1.0 in d:\ai\data\packages\stable diffusion webui forge - neo\venv\lib\site-packages (from sympy>=1.13.3->torch==2.9.1+cu130) (1.3.0)
Requirement already satisfied: MarkupSafe>=2.0 in d:\ai\data\packages\stable diffusion webui forge - neo\venv\lib\site-packages (from jinja2->torch==2.9.1+cu130) (2.1.5)
Downloading https://download.pytorch.org/whl/cu130/torch-2.9.1%2Bcu130-cp312-cp312-win_amd64.whl (1862.1 MB)
---------------------------------------- 1.9/1.9 GB 26.9 MB/s 0:00:59
Downloading https://download.pytorch.org/whl/cu130/torchvision-0.24.1%2Bcu130-cp312-cp312-win_amd64.whl (8.9 MB)
---------------------------------------- 8.9/8.9 MB 32.6 MB/s 0:00:00
Installing collected packages: torch, torchvision
Attempting uninstall: torch
Found existing installation: torch 2.8.0+cu128
Uninstalling torch-2.8.0+cu128:
Successfully uninstalled torch-2.8.0+cu128
Attempting uninstall: torchvision
Found existing installation: torchvision 0.23.0+cu128
Uninstalling torchvision-0.23.0+cu128:
Successfully uninstalled torchvision-0.23.0+cu128
---------------------------------------- 2/2 [torchvision]
Successfully installed torch-2.9.1+cu130 torchvision-0.24.1+cu130
Launching Web UI with arguments: --sage --cuda-malloc --cuda-stream --skip-python-version-check --fast-fp16 --reinstall-torch --gradio-allowed-path 'D:\AI\Data\Images'
Using cudaMallocAsync backend.
Total VRAM 16303 MB, total RAM 97849 MB
pytorch version: 2.9.1+cu130
allow_fp16_accumulation: True
Set vram state to: NORMAL_VRAM
Device: cuda:0 NVIDIA GeForce RTX 5070 Ti : cudaMallocAsync
VAE dtype preferences: [torch.bfloat16, torch.float32] -> torch.bfloat16
CUDA Using Stream: True
Traceback (most recent call last):
File "D:\AI\Data\Packages\Stable Diffusion WebUI Forge - Neo\venv\Lib\site-packages\diffusers\utils\import_utils.py", line 1016, in _get_module
return importlib.import_module("." + module_name, self.__name__)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "D:\AI\Data\Assets\Python\cpython-3.12.11-windows-x86_64-none\Lib\importlib\__init__.py", line 90, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "<frozen importlib._bootstrap>", line 1387, in _gcd_import
File "<frozen importlib._bootstrap>", line 1360, in _find_and_load
File "<frozen importlib._bootstrap>", line 1310, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed
File "<frozen importlib._bootstrap>", line 1387, in _gcd_import
File "<frozen importlib._bootstrap>", line 1360, in _find_and_load
File "<frozen importlib._bootstrap>", line 1331, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 935, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 999, in exec_module
File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed
File "D:\AI\Data\Packages\Stable Diffusion WebUI Forge - Neo\venv\Lib\site-packages\diffusers\models\autoencoders\__init__.py", line 1, in <module>
from .autoencoder_asym_kl import AsymmetricAutoencoderKL
File "D:\AI\Data\Packages\Stable Diffusion WebUI Forge - Neo\venv\Lib\site-packages\diffusers\models\autoencoders\autoencoder_asym_kl.py", line 23, in <module>
from .vae import AutoencoderMixin, DecoderOutput, DiagonalGaussianDistribution, Encoder, MaskConditionDecoder
File "D:\AI\Data\Packages\Stable Diffusion WebUI Forge - Neo\venv\Lib\site-packages\diffusers\models\autoencoders\vae.py", line 25, in <module>
from ..unets.unet_2d_blocks import (
File "D:\AI\Data\Packages\Stable Diffusion WebUI Forge - Neo\venv\Lib\site-packages\diffusers\models\unets\__init__.py", line 6, in <module>
from .unet_2d import UNet2DModel
File "D:\AI\Data\Packages\Stable Diffusion WebUI Forge - Neo\venv\Lib\site-packages\diffusers\models\unets\unet_2d.py", line 24, in <module>
from .unet_2d_blocks import UNetMidBlock2D, get_down_block, get_up_block
File "D:\AI\Data\Packages\Stable Diffusion WebUI Forge - Neo\venv\Lib\site-packages\diffusers\models\unets\unet_2d_blocks.py", line 36, in <module>
from ..transformers.dual_transformer_2d import DualTransformer2DModel
File "D:\AI\Data\Packages\Stable Diffusion WebUI Forge - Neo\venv\Lib\site-packages\diffusers\models\transformers\__init__.py", line 20, in <module>
from .transformer_bria import BriaTransformer2DModel
File "D:\AI\Data\Packages\Stable Diffusion WebUI Forge - Neo\venv\Lib\site-packages\diffusers\models\transformers\transformer_bria.py", line 14, in <module>
from ..attention_dispatch import dispatch_attention_fn
File "D:\AI\Data\Packages\Stable Diffusion WebUI Forge - Neo\venv\Lib\site-packages\diffusers\models\attention_dispatch.py", line 92, in <module>
from sageattention import (
File "D:\AI\Data\Packages\Stable Diffusion WebUI Forge - Neo\venv\Lib\site-packages\sageattention\__init__.py", line 1, in <module>
from .core import sageattn, sageattn_varlen
File "D:\AI\Data\Packages\Stable Diffusion WebUI Forge - Neo\venv\Lib\site-packages\sageattention\core.py", line 47, in <module>
from .quant import per_block_int8 as per_block_int8_cuda
File "D:\AI\Data\Packages\Stable Diffusion WebUI Forge - Neo\venv\Lib\site-packages\sageattention\quant.py", line 20, in <module>
from . import _fused
ImportError: DLL load failed while importing _fused: The specified module could not be found.
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "D:\AI\Data\Packages\Stable Diffusion WebUI Forge - Neo\venv\Lib\site-packages\diffusers\utils\import_utils.py", line 1016, in _get_module
return importlib.import_module("." + module_name, self.__name__)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "D:\AI\Data\Assets\Python\cpython-3.12.11-windows-x86_64-none\Lib\importlib\__init__.py", line 90, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "<frozen importlib._bootstrap>", line 1387, in _gcd_import
File "<frozen importlib._bootstrap>", line 1360, in _find_and_load
File "<frozen importlib._bootstrap>", line 1331, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 935, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 999, in exec_module
File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed
File "D:\AI\Data\Packages\Stable Diffusion WebUI Forge - Neo\venv\Lib\site-packages\diffusers\pipelines\pipeline_utils.py", line 47, in <module>
from ..models import AutoencoderKL
File "<frozen importlib._bootstrap>", line 1412, in _handle_fromlist
File "D:\AI\Data\Packages\Stable Diffusion WebUI Forge - Neo\venv\Lib\site-packages\diffusers\utils\import_utils.py", line 1006, in __getattr__
module = self._get_module(self._class_to_module[name])
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "D:\AI\Data\Packages\Stable Diffusion WebUI Forge - Neo\venv\Lib\site-packages\diffusers\utils\import_utils.py", line 1018, in _get_module
raise RuntimeError(
RuntimeError: Failed to import diffusers.models.autoencoders.autoencoder_kl because of the following error (look up to see its traceback):
DLL load failed while importing _fused: The specified module could not be found.
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "D:\AI\Data\Packages\Stable Diffusion WebUI Forge - Neo\launch.py", line 52, in <module>
main()
File "D:\AI\Data\Packages\Stable Diffusion WebUI Forge - Neo\launch.py", line 48, in main
start()
File "D:\AI\Data\Packages\Stable Diffusion WebUI Forge - Neo\modules\launch_utils.py", line 505, in start
import webui
File "D:\AI\Data\Packages\Stable Diffusion WebUI Forge - Neo\webui.py", line 25, in <module>
initialize.imports()
File "D:\AI\Data\Packages\Stable Diffusion WebUI Forge - Neo\modules\initialize.py", line 49, in imports
from modules import gradio_extensions, processing, ui # noqa: F401
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "D:\AI\Data\Packages\Stable Diffusion WebUI Forge - Neo\modules\processing.py", line 22, in <module>
import modules.sd_models as sd_models
File "D:\AI\Data\Packages\Stable Diffusion WebUI Forge - Neo\modules\sd_models.py", line 11, in <module>
from backend.loader import forge_loader
File "D:\AI\Data\Packages\Stable Diffusion WebUI Forge - Neo\backend\loader.py", line 7, in <module>
from diffusers import DiffusionPipeline
File "<frozen importlib._bootstrap>", line 1412, in _handle_fromlist
File "D:\AI\Data\Packages\Stable Diffusion WebUI Forge - Neo\venv\Lib\site-packages\diffusers\utils\import_utils.py", line 1007, in __getattr__
value = getattr(module, name)
^^^^^^^^^^^^^^^^^^^^^
File "D:\AI\Data\Packages\Stable Diffusion WebUI Forge - Neo\venv\Lib\site-packages\diffusers\utils\import_utils.py", line 1006, in __getattr__
module = self._get_module(self._class_to_module[name])
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "D:\AI\Data\Packages\Stable Diffusion WebUI Forge - Neo\venv\Lib\site-packages\diffusers\utils\import_utils.py", line 1018, in _get_module
raise RuntimeError(
RuntimeError: Failed to import diffusers.pipelines.pipeline_utils because of the following error (look up to see its traceback):
Failed to import diffusers.models.autoencoders.autoencoder_kl because of the following error (look up to see its traceback):
DLL load failed while importing _fused: The specified module could not be found.
[W108 10:06:22.000000000 AllocatorConfig.cpp:28] Warning: PYTORCH_CUDA_ALLOC_CONF is deprecated, use PYTORCH_ALLOC_CONF instead (function operator ())
Version
2.15.5
What Operating System are you using?
Windows