Revert back xformers(and Torch) version

[Eoftar]

How do I do it?

Today I finally decided to update my xformers as my web ui recommended it for a very long time. It was a mistake.

The problems started at the beggining. Telling the webui to "reinstall xformers" didn't work - it started arguing that it doesn't work with my versions of Torch. Several manual on Discord mentioned deleting venv folder, that it will force web ui to reinstall and update everything. Well, it worked... and now that's a problem.

Used the same prompt. Before update it took 5 min. 54.8 sec. with about 14-16 seconds per iteration(upscale). Now it takes 7 min. 32.5 sec. with about 19-20 seconds per iteration. In short, everthing is 1.5 times slower, and that's a very basic prompt. I know I don't have the best PC, with an old 1050 Ti, but even with that everything was faster with the old stuff.

Before I had 0.0.20 version of xformers, how do I revert back to it?

1. As a code monkey, I tried to just delete "xformers" folder in venv and shove in an older version I downloaded from github. As expected, it didn't work.

2. Deleted venv. Then, found some guides and set in web-ui user.bat what exact version of xformers it should reinstall:

@echo off

set PYTHON=
set GIT=
set VENV_DIR=
set XFORMERS_PACKAGE=xformers==0.0.20
set COMMANDLINE_ARGS=--xformers --reinstall-xformers

call webui.bat

It "worked" but it started yelling at me that it doesn't work with the newest version of Torch.

3. I tried to reinstall torch manually, but it didn't work - obviously I did something wrong, but I don't know what exactly. I'm not a programmer, I'm a code monkey, remember?

4. Then after digging around the net I found out that "requirements_versions.txt" in SD folder actually manages what versions of what to install. Deleted venv again. Set the txt file to install 2.0.1 version of Torch(which I had before). It did, but xformers said that it works with 2.0.1+cu118 and I have 2.0.1+cpu for some reason.

5. Deleted venv. Set in txt file that it should download exactly 2.0.1-cu118. It didn't work.

I just don't know what to do anymore. Just want to revert everything back to what it was before that goddamn xfromers update.

PS please, don't suggest me to buy a "better GPU". I'm perfectly fine with what I have and the speed at which my old granny 1050 generated stuff was satisfactory. I just want to revert my settings to older versions.

[missionfloyd]

You can downgrade torch using the TORCH_COMMAND variable and --reinstall-torch

set TORCH_COMMAND=pip install torch==2.1.2 torchvision==0.16.2 --extra-index-url https://download.pytorch.org/whl/cu121

https://pytorch.org/get-started/previous-versions/

[Surran-Peng]

I used this.
set XFORMERS_PACKAGE=xformers --index-url https://download.pytorch.org/whl/cu118