the knowledge could fix this or propose a patch I could test, because it's pretty reproducable on my system. Thanks. Program received signal SIGSEGV, Segmentation fault. 0xb6ae3284 in nouveau_pushbuf_submit (chan=0x9a277e0, bo=0x0, offset=0, length=0) at nouveau_pushbuf.c:181 181 nouveau_pushbuf.c: Aucun fichier ou dossier de ce type. in nouveau_pushbuf.c (gdb) bt #0 0xb6ae3284 in nouveau_pushbuf_submit (chan=0x9a277e0, bo=0x0, offset=0, length=0) at nouveau_pushbuf.c:181 #1 0xb6ae3440 in nouveau_pushbuf_flush (chan=0x9a277e0, min=0) at nouveau_pushbuf.c:231 #2 0xb6b4a5c4 in nvfx_push_vbo () from /usr/lib/dri/nouveau_dri.so #3 0xb6b34d07 in nvfx_draw_vbo () from /usr/lib/dri/nouveau_dri.so #4 0xb6c7e9e6 in st_draw_vbo () from /usr/lib/dri/nouveau_dri.so #5 0xb6ca2ab0 in vbo_validated_drawrangeelements () from /usr/lib/dri/nouveau_dri.so #6 0xb6ca2f0a in vbo_exec_DrawRangeElementsBaseVertex () from /usr/lib/dri/nouveau_dri.so #7 0xb6ca302c in vbo_exec_DrawRangeElements () from /usr/lib/dri/nouveau_dri.so #8 0x080ddd30 in R_Mesh_Draw (firstvertex=1153, numvertices=773, firsttriangle=1226, numtriangles=726, element3i=0xa73331c, element3s=0xa75a034, bufferobject3i=0, bufferobject3s=0) at gl_backend.c:1503 #9 0x080e91f3 in RSurf_DrawBatch_Simple (texturenumsurfaces=1, texturesurfacelist=0xc390948) at gl_rmain.c:10787 #10 0x080ff97f in R_DrawTextureSurfaceList_GL20 (texturenumsurfaces=1, texturesurfacelist=0xc390948, writedepth=true, prepass=false) at gl_rmain.c:11487 #11 0x081075be in R_DrawModelTextureSurfaceList (texturenumsurfaces=1, texturesurfacelist=0xc390948, writedepth=true, prepass=false) at gl_rmain.c:11883 #12 0x081089be in R_ProcessModelTextureSurfaceList (ent=0xcd22b28, numsurfaces=7, surfacelist=0xc390930, flagsmask=64, writedepth=true, depthonly=false, prepass=false) at gl_rmain.c:12220 #13 R_QueueModelSurfaceList (ent=0xcd22b28, numsurfaces=7, surfacelist=0xc390930, flagsmask=64, writedepth=true, depthonly=false, prepass=false) at gl_rmain.c:12261 #14 0x08108fc3 in R_DrawModelSurfaces (ent=0xcd22b28, skysurfaces=false, writedepth=true, depthonly=false, debug=false, prepass=false) at gl_rmain.c:13354 #15 0x0810c954 in R_Q1BSP_Draw (ent=0xb57dd000) at gl_rsurf.c:600 #16 0x08103f75 in R_DrawModels () at gl_rmain.c:7345 #17 R_RenderScene () at gl_rmain.c:9003 #18 0x081067fc in R_RenderView () at gl_rmain.c:8854 #19 0x080a83d8 in VM_CL_R_RenderScene () at clvm_cmds.c:3018 #20 0x081c28c7 in CLVM_ExecuteProgram (fnum=1220, errormessage=0x82cbee0 "QC function CSQC_UpdateView is missing") at prvm_execprogram.h:345 #21 0x080c5af6 in CL_VM_UpdateView () at csprogs.c:364 #22 0x0809d6a0 in SCR_DrawScreen () at cl_screen.c:1636 #23 0x0809e91e in CL_UpdateScreen () at cl_screen.c:2241 #24 0x081165c3 in Host_Main () at host.c:948 #25 0x0804b21e in main (argc=Cannot access memory at address 0xfffffffc) at sys_sdl.c:180