Find the clean_probe_rt.comp construct that crashes AMD's Windows shader compiler #1065

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opened 2026-10-25 19:00:37 +00:00 by sky_line · 0 comments

sky_line commented

2026-10-25 19:00:37 +00:00

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Follow-up to #1064. AMD's proprietary Windows Vulkan driver (26.10.1, RX 6800 XT) crashes in amdvlk64.dll+0x7f5571 while compiling clean_probe_rt.comp (ProbeRt). #1064 stops the crash loop (lazy build + crash quarantine); this ticket is about making the shader compile on that driver so the feature works there.

Plan:

Bisect the shader with the reporter (or any AMD Windows tester): ship test builds or a setting that compiles reduced variants (e.g. without the ray-query candidate loop, without the light walk, without bindless texture sampling) and see which one crashes.
Compare against the RT shaders that DO compile on that driver (RtMaskCache, RT mask react, etc.) for constructs only ProbeRt uses.
Once isolated, restructure that construct; report the reduced repro to AMD.
Check whether the same driver also crashes on other heavy RT pipelines once ProbeRt is skipped.

Follow-up to #1064. AMD's proprietary Windows Vulkan driver (26.10.1, RX 6800 XT) crashes in `amdvlk64.dll+0x7f5571` while compiling `clean_probe_rt.comp` (ProbeRt). #1064 stops the crash loop (lazy build + crash quarantine); this ticket is about making the shader compile on that driver so the feature works there. Plan: - Bisect the shader with the reporter (or any AMD Windows tester): ship test builds or a setting that compiles reduced variants (e.g. without the ray-query candidate loop, without the light walk, without bindless texture sampling) and see which one crashes. - Compare against the RT shaders that DO compile on that driver (RtMaskCache, RT mask react, etc.) for constructs only ProbeRt uses. - Once isolated, restructure that construct; report the reduced repro to AMD. - Check whether the same driver also crashes on other heavy RT pipelines once ProbeRt is skipped.

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sky_line added this to the Slipstream project

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2026-10-25 19:00:37 +00:00

#1064 Startup crash loop: AMD Windows driver crashes compiling the ray-traced probe capture shader (ProbeRt)

sky_line self-assigned this

2026-10-26 02:58:26 +00:00