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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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backend/services/cuda.py
+1 -1
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@@ -32,7 +32,7 @@ PROGRESS_KEY = "cuda-backend"
# The current expected CUDA libs version. Bump this when we change the
# CUDA toolkit version or torch's CUDA dependency changes (e.g. cu126 -> cu128).
CUDA_LIBS_VERSION = "cu126-v1"
CUDA_LIBS_VERSION = "cu128-v1"
def get_backends_dir() -> Path: