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...t; on nv43 Severity: normal Classification: Unclassified OS: Linux (All) Reporter: randrik at mail.ru Hardware: x86 (IA32) Status: NEW Version: git Component: Drivers/DRI/nouveau Product: Mesa teapot, ray, dinoshade - all started to segfault. Reverting mesa commit 48a45ec24ae74c00d1487552e94d9f824a428f58 restores all demos back to working state. bt full: bash-4.2$ gdb ./dinoshade GNU gdb (GDB) 7.5 Copyright (C) 2012 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.o...

...that has just been freed, resulting in the buffer actually been reused. Thus Mesa will overwrite the vertices before the GPU has used them. This results in all kinds of artifacts, such as vertices going to infinity, and random polygons appearing. This can be seen in progs/demos/engine, progs/demos/dinoshade, Blender, Extreme Tux Racer and probably any non-trivial OpenGL software. The problem can be significantly reduced by just adding a waiting loop at the end of draw_arrays and draw_elements, or by synchronizing drawing by adding and calling the following function instead of pipe->flush in nv40_...

...reedesktop.org ReportedBy: luca.barbieri at gmail.com On my G71 system, several programs show vertex corruption issues. In particular, vertices tend to be corrupted or randomly go to infinity, leading to spiked triangles or random polygons, in several programs, such as demos/engine, demos/dinoshade, Blender, Extreme Tux Racer. The system is running: Linux 2.6.33-rc2 libdrm 2.4.17 Mesa HEAD (b46bcd8e7b37aa2e9159e126c1cc88234a3c2790) Detected an NV40 generation card (0x049800a2) 64 MB GART aperture 256 MB VRAM The problem is solved by either of the following: 1. #define FORCE_SWTNL 1 2. Addi...