How did you compile this?
When I build SageAttention 2.1.1 with torch2.7.0+cu128-cp11 and use with reForge or forgeClassic i get black outputs, i wonder if you did anything special to get it working with blackwell card or reForge?
I just do git clone and then python setup.py bdist_wheel, and then I install the wheel.
I did a new build yesterday with latest nightly and 2.7.0 and it seems to work fine.
Just uploaded it if you want test.
That's exactly how I built it as well! But it wasn't working, for some reason it was giving me black outputs only when using SageAttention2. After going to sleep and restarting my PC it works just fine, and I'm getting a slight speed up, so I guess my GPU was to blame somehow, although I have no clue what happened haha, I would've tested yours if mine didn't suddenly work but I'm happy I can stay on Python 11 a while longer :)