python 3.11.9 + SD1.10.1 +Xformers 0.0.31.post1 is OK

[pongleader]

laptop: ASUS(R9-8940HX + RTX5070Ti ) windows 11

(1)python 3.11.9 + git + https://github.com/AUTOMATIC1111/stable-diffusion-webui.git
(2)edit \modules\lanch_ultil.py
....
torch_index_url = os.environ.get('TORCH_INDEX_URL', "https://download.pytorch.org/whl/cu121") fix -->cu128

torch_command = os.environ.get('TORCH_COMMAND', f"pip install torch==2.1.2 torchvision==0.16.0 --extra-index-url {torch_index_url}")
fix -->torch==2.7.1 torchvision==0.22.1
.....
xformers_package = os.environ.get('XFORMERS_PACKAGE', 'xformers==0.0.23.post1' FIX-->xformers==0.0.31.post1

(3) webui-user.bat
set COMMANDLINE_ARGS=--xformers

Running is ok !

[w-e-w]

you could just use the dev branch

• Nvidia Blackwell 50XX GPU instructions (updated) #16818

if you don't want to use the dev branch then you still don't have to edit the code
just set TORCH_COMMAND XFORMERS_PACKAGE environment variables
exactly the point of why it is coded with os.environ.get it gives the user ability to modify the behavior without modifying the code directly

[MasterJohan]

For some reason, when I used the dev branch with the author's installation guide, I got error messages as soon as I downloaded dreambooth. I somehow thought it is about xformers, because it explicitly gave me back messages about xformers. It might be a compatibility issue between the versions of the cuda, pytorch. I do not know though. I am trying to install the way this guy says.

Before, I manually updated the versions of my torch but not xformers or anything. I hope it works now. I will edit this reply later.

[w-e-w]

I never use dreambooth extention on a1111 myself so I cant say for sure but I recall others saying that it broken long time ago

I think it's better if you use https://github.com/bmaltais/kohya_ss it also supprots dreambooth