[Bug]: I can't install xFormers

[Franches13]

Checklist

• The issue exists after disabling all extensions
• The issue exists on a clean installation of webui
• The issue is caused by an extension, but I believe it is caused by a bug in the webui
• The issue exists in the current version of the webui
• The issue has not been reported before recently
• The issue has been reported before but has not been fixed yet

What happened?

i just want to install xformers for make faster images on StableDiffusion but i cant, no matter what i do i cant generate anything

Steps to reproduce the problem

1. --xformers in webui-user.sh
2. generate a image

What should have happened?

Xformers should be build for Cuda support

What browsers do you use to access the UI ?

Other

Sysinfo

RTX 3060TI
64gb ram

Console logs

raise NotImplementedError(msg)
    NotImplementedError: No operator found for `memory_efficient_attention_forward` with inputs:
         query       : shape=(2, 1024, 10, 64) (torch.float32)
         key         : shape=(2, 1024, 10, 64) (torch.float32)
         value       : shape=(2, 1024, 10, 64) (torch.float32)
         attn_bias   : <class 'NoneType'>
         p           : 0.0
    `decoderF` is not supported because:
        xFormers wasn't build with CUDA support
        attn_bias type is <class 'NoneType'>
        operator wasn't built - see `python -m xformers.info` for more info
    `[email protected]` is not supported because:
        xFormers wasn't build with CUDA support
        dtype=torch.float32 (supported: {torch.float16, torch.bfloat16})
        operator wasn't built - see `python -m xformers.info` for more info
    `tritonflashattF` is not supported because:
        xFormers wasn't build with CUDA support
        dtype=torch.float32 (supported: {torch.float16, torch.bfloat16})
        operator wasn't built - see `python -m xformers.info` for more info
        triton is not available
    `cutlassF` is not supported because:
        xFormers wasn't build with CUDA support
        operator wasn't built - see `python -m xformers.info` for more info
    `smallkF` is not supported because:
        max(query.shape[-1] != value.shape[-1]) > 32
        xFormers wasn't build with CUDA support
        operator wasn't built - see `python -m xformers.info` for more info
        unsupported embed per head: 64

Additional information

NotImplementedError: No operator found for memory_efficient_attention_forward with inputs: query : shape=(2, 1024, 10, 64) (torch.float32) key : shape=(2, 1024, 10, 64) (torch.float32) value : shape=(2, 1024, 10, 64) (torch.float32) attn_bias : <class 'NoneType'> p : 0.0 decoderF is not supported because: xFormers wasn't build with CUDA support attn_bias type is <class 'NoneType'> operator wasn't built - see python -m xformers.info for more info [email protected] is not supported because: xFormers wasn't build with CUDA support dtype=torch.float32 (supported: {torch.bfloat16, torch.float16}) operator wasn't built - see python -m xformers.info for more info tritonflashattF is not supported because: xFormers wasn't build with CUDA support dtype=torch.float32 (supported: {torch.bfloat16, torch.float16}) operator wasn't built - see python -m xformers.info for more info triton is not available cutlassF is not supported because: xFormers wasn't build with CUDA support operator wasn't built - see python -m xformers.info for more info smallkF is not supported because: max(query.shape[-1] != value.shape[-1]) > 32 xFormers wasn't build with CUDA support operator wasn't built - see python -m xformers.info for more info unsupported embed per head: 64

(Stable Diffusion)

[w-e-w]

I can't install xFormers

I don't believe that's the case "xformers wasn't build with CUDA support"
if it isn't installed then it will be a completely different error message
I believe it is installed just not correctly

I may have seen similar error messages cause by a a miss match of version between xformers and pytorch
if you want people to actually help you then you would want to provide your sysinfo

sysinfo is a json file generated by web UI, not two lines, read the issue template instructions

---

because you did not provide sysinfo, the following is pure guesswork
my guess some distro of linux with python 3.12~ as default, irrc the default pytorch that the default version we use is not support on 3.12 and so you install a new version manually
then you use --xformers which by default installs a version of xformers meant for the old version of pytorch

if my guess is correct then I will try
I will try installing xformers yourself manually, overriding what web UI does automatically
or install an old version of python, 3.11 or 3.10 then run web ui usin it