Created attachment 131311 [details] apitrace Hello! Not sure if this bug is regression or it was there for long time, but master branch of Cinelerra-CV (open-source video editing software, see https://git.cinelerra-cv.org/gitweb for their source code, I talk about version from https://git.cinelerra-cv.org/gitweb?p=CinelerraCV.git;a=summary ) crashes for me on Mesa/Nouveau (nv92), if I set Video Output for OpenGL, on video load. I made apitrace of this crash, but it strangely short (attached) Currently running mesa OpenGL core profile version string: 3.3 (Core Profile) Mesa 17.2.0-devel (git-bdaff25) , X server 1.19.1, kernel 4.11.0-rc7-x64+, xf86-video-nouveau commit a7c190e0c230ed2d5e047ed6aba12d71a4866950 (1.0.15). I'll attach gdb session log, too.
Created attachment 131312 [details] GDB log
Created attachment 131313 [details] X log
Created attachment 131325 [details] glxinfo -l log
LIBGL_ALWAYS_SOFTWARE=1 cinelerra does not crash.
LIBGL_DRI3_DISABLE=1 also fixes crash. Additionally, this setting fixes OpenGL accelerated effects in another branch of Cinelerra (5.1).
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