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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
Download Patch File Download Diff File Expand all files Collapse all files
app/src/components/ServerSettings/GpuAcceleration.tsx
+36 -22
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@@ -243,7 +243,40 @@ export function GpuAcceleration() {
{/* Native GPU detected - no CUDA download needed */}
{/* CUDA download section - only show when no GPU is active (native or CUDA) */}
{/* Currently running CUDA - show switch back to CPU */}
{isCurrentlyCuda && platform.metadata.isTauri && (
<>
{restartPhase !== 'idle' ? (
<div className="flex items-center gap-2 p-3 rounded-lg bg-primary/5 border">
<Loader2 className="h-4 w-4 animate-spin" />
<span className="text-sm">
{restartPhase === 'stopping' && 'Stopping server...'}
{restartPhase === 'waiting' && 'Restarting server...'}
{restartPhase === 'ready' && 'Server restarted successfully!'}
</span>
</div>
) : (
<div className="space-y-3">
<p className="text-sm text-muted-foreground">
Running with CUDA GPU acceleration. Switch back to CPU if needed (you can
re-download later).
</p>
<Button onClick={handleSwitchToCpu} variant="outline" className="w-full" size="sm">
<RotateCw className="h-4 w-4 mr-2" />
Switch to CPU Backend
</Button>
</div>
)}
{error && (
<div className="flex items-center gap-2 text-sm text-destructive">
<AlertCircle className="h-4 w-4 shrink-0" />
<span>{error}</span>
</div>
)}
</>
)}
{/* CUDA download/manage section - show when no native GPU and not currently running CUDA */}
{!hasNativeGpu && !isCurrentlyCuda && (
<>
{/* Download progress (manual download or auto-update) */}
@@ -315,7 +348,7 @@ export function GpuAcceleration() {
)}
{/* Downloaded but not active - show switch button */}
{cudaAvailable && !isCurrentlyCuda && platform.metadata.isTauri && (
{cudaAvailable && platform.metadata.isTauri && (
<div className="space-y-3">
<p className="text-sm text-muted-foreground">
CUDA backend is downloaded and ready. Restart the server to enable GPU
@@ -328,27 +361,8 @@ export function GpuAcceleration() {
</div>
)}
{/* Currently active - show switch back to CPU */}
{isCurrentlyCuda && platform.metadata.isTauri && (
<div className="space-y-3">
<p className="text-sm text-muted-foreground">
Running with CUDA GPU acceleration. Switch back to CPU if needed (you can
re-download later).
</p>
<Button
onClick={handleSwitchToCpu}
variant="outline"
className="w-full"
size="sm"
>
<RotateCw className="h-4 w-4 mr-2" />
Switch to CPU Backend
</Button>
</div>
)}
{/* Delete option when downloaded (and not active) */}
{cudaAvailable && !isCurrentlyCuda && (
{cudaAvailable && (
<Button
onClick={handleDelete}
variant="ghost"