| Bug ID | 91780 |
|---|---|
| Summary | Rendering issues with geometry shader |
| Product | Mesa |
| Version | git |
| Hardware | x86-64 (AMD64) |
| OS | Linux (All) |
| Status | NEW |
| Severity | normal |
| Priority | medium |
| Component | Drivers/Gallium/r600 |
| Assignee | dri-devel@lists.freedesktop.org |
| Reporter | jonas@wielicki.name |
| QA Contact | dri-devel@lists.freedesktop.org |
Created attachment 117951 [details] apitrace which shows the problem In the attached apitrace, *sometimes* (about 50% of the runs) rendering issues can be observed. They manifest in appearantly missing geometry (compare attached screenshot; the UI has been disabled for taking the apitrace). Steps to reproduce: 1. DRI_PRIME=1 apitrace replay r600-renderbug-noui.trace 2. If step 1 did not show the behaviour, retry a few times. Expected results: Rendering should work and show a terrain without holes Actual results: Holes in the terrain The results have been observed on mesa-11.0.0-rc1 with and without http://lists.freedesktop.org/archives/mesa-dev/2015-August/092766.html applied. The same code has never (in 50+ tests) shown the issue on the Intel integrated GPU. The application which produces the given behaviour can be found at https://github.com/horazont/scc/tree/f31d90e1579ebda14ce7a0417339b2cd448efde8 The geometry shader is in: https://github.com/horazont/scc/blob/f31d90e1579ebda14ce7a0417339b2cd448efde8/game/resources/shaders/terrain/main.geom The usage is in: https://github.com/horazont/scc/blob/f31d90e1579ebda14ce7a0417339b2cd448efde8/libffengine-render/src/render/fancyterrain.cpp (search for draw_elements, GL_GEOMETRY_SHADER, GL_LINES_ADJACENCY) In another commit, the geometry shader has been disabled (<https://github.com/horazont/scc/commit/4e1e298b02723efcf6555c1c4a7efa31682cf79b>), which appears to fix the problem or make it very hard to reproduce. radeon GPU: Advanced Micro Devices, Inc. [AMD/ATI] Whistler [Radeon HD 6630M/6650M/6750M/7670M/7690M] (rev ff) {6630M according to notebook specs} intel GPU: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)
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