Comment # 64
on bug 101731
from Samuel Pitoiset
See the attached trace from https://bugs.freedesktop.org/show_bug.cgi?id=102797, it reproduces the same issue. So, basically the issue is that wine fails to set the transform feedback varyings in some situations, this explains why the following message is reported "fixme:d3d_shader:shader_glsl_generate_transform_feedback_varyings Unsupported component range 2-2.". Then, the GPU will hang later on because it will read garbage from a TFB buffer. About TW3, I think that game uses TFB in some scenarios, I don't know why and when, maybe it's based on some occlusion queries or some time constraints? Either way, this might explain why TFB is not used when tracing with apitrace or when using "GALLIUM_DDEBUG=800" which will flush and wait 800ms after every draw call. The attached patches should workaround both issues (TW3 and Superposition), but wine has to be fixed here. Please, let the bug open until it's really fixed.
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