docs: NVIDIA/Blackwell support notes + standalone test harness#2223
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Sigmachan wants to merge 2 commits into
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docs: NVIDIA/Blackwell support notes + standalone test harness#2223Sigmachan wants to merge 2 commits into
Sigmachan wants to merge 2 commits into
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Document NVIDIA (RTX 5090 / driver 610) support: nested mode works (5090 selected, flip swapchain, VK_EXT_swapchain_maintenance1); the 555+ IN_FENCE_FD EPERM quirk is already handled. Remaining gaps are the standalone DRM backend and HDR colour (DRM path uses AMD-only AMD_PLANE_* props; NVIDIA must use the Vulkan composite colour path). Add contrib/nvidia-standalone-test.sh: a guarded on-hardware test for the standalone DRM backend and HDR, with diagnostics capture, time-boxing, and a watchdog that SIGKILLs gamescope and chvt's back so a wedged run never strands the user at a black screen.
gamescope reproducibly crashes compiling its composite/upscale shaders inside libnvidia-glvkspirv 610.43.02 (SIGSEGV in _nv002nvvm), before the first swapchain. Not shader-cache related. Captured backtrace + next steps (bisect offending shader, minimal repro, NVIDIA bug report, startup fallback).
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I'm not sure I understand the point of this or why we would find it useful. |
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Adds developer-facing notes for running gamescope on the NVIDIA proprietary driver (Blackwell / RTX 5090, driver 610), plus a guarded standalone test harness.
docs/NVIDIA.md— what currently works (nested mode; the existing NVIDIA-555IN_FENCE_FD/EPERM handling in DRMBackend.cpp), the real gaps (standalone DRM-backend validation; HDR colour offload uses AMD-only plane props, so NVIDIA needs the Vulkan composite colour path), and a reproducible SPIR-V compiler SEGV on driver 610.contrib/nvidia-standalone-test.sh— time-boxed standalone-DRM test with a watchdog that SIGKILLs gamescope andchvts back, so a wedged run never strands you at a black screen.Docs + one contrib script; no engine code changes.