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upgrade CUDA backend from cu126 to cu128 and fix GPU settings UI

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Upgrade CUDA toolkit from 12.6 (cu126) to 12.8 (cu128) for proper
RTX 50-series (Blackwell) GPU support. Users with RTX 5070/5080/5090
were reporting CUDA detection failures with cu126.

Also fix the GPU Acceleration settings panel where the 'Switch to CPU
Backend' button was unreachable — it was inside a conditional block
that required !isCurrentlyCuda, making it impossible to switch back
to CPU once running on CUDA.

Closes #315
This commit is contained in:
James Pine
2026-03-18 07:47:39 -07:00
parent c9f38dd496
commit fc5ed1ff40
8 changed files with 54 additions and 40 deletions
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.github/workflows/release.yml
+7 -7
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@@ -191,10 +191,10 @@ jobs:
pip install --no-deps chatterbox-tts
pip install --no-deps hume-tada
- name: Install PyTorch with CUDA 12.6
- name: Install PyTorch with CUDA 12.8
run: |
pip install torch --index-url https://download.pytorch.org/whl/cu126 --force-reinstall --no-deps
pip install torchaudio --index-url https://download.pytorch.org/whl/cu126 --force-reinstall --no-deps
pip install torch --index-url https://download.pytorch.org/whl/cu128 --force-reinstall --no-deps
pip install torchaudio --index-url https://download.pytorch.org/whl/cu128 --force-reinstall --no-deps
- name: Verify CUDA support in torch
run: |
@@ -211,8 +211,8 @@ jobs:
python scripts/package_cuda.py \
backend/dist/voicebox-server-cuda/ \
--output release-assets/ \
--cuda-libs-version cu126-v1 \
--torch-compat ">=2.6.0,<2.11.0"
--cuda-libs-version cu128-v1 \
--torch-compat ">=2.7.0,<2.11.0"
- name: Upload archives to GitHub Release
if: startsWith(github.ref, 'refs/tags/')
@@ -221,8 +221,8 @@ jobs:
files: |
release-assets/voicebox-server-cuda.tar.gz
release-assets/voicebox-server-cuda.tar.gz.sha256
release-assets/cuda-libs-cu126-v1.tar.gz
release-assets/cuda-libs-cu126-v1.tar.gz.sha256
release-assets/cuda-libs-cu128-v1.tar.gz
release-assets/cuda-libs-cu128-v1.tar.gz.sha256
release-assets/cuda-libs.json
draft: true
env: