Program received signal SIGSEGV, Segmentation fault. 0x00007f167e64d65c in intel_renderbuffer (rb=0x404) at ../intel/intel_fbo.h:89 89 ../intel/intel_fbo.h: No such file or directory. in ../intel/intel_fbo.h (gdb) bt f #0 0x00007f167e64d65c in intel_renderbuffer (rb=0x404) at ../intel/intel_fbo.h:89 irb = 0x404 #1 0x00007f167e64d6b5 in intel_get_renderbuffer (fb=0x6b42a00, attIndex=4) at ../intel/intel_fbo.h:105 No locals. #2 0x00007f167e64f8a1 in intelDestroyContext (driContextPriv=0x6f9a2b0) at intel_context.c:851 driDrawPriv = 0x71410e0 intel_fb = 0x6b42a00 irbDepth = 0x0 irbStencil = 0x0 release_texture_heaps = 1 '\1' intel = 0x6a861f0 __PRETTY_FUNCTION__ = "intelDestroyContext" #3 0x00007f167e6406fb in driDestroyContext (pcp=0x6f9a2b0) at ../common/dri_util.c:545 No locals. #4 0x00007f167fb84c32 in __glXDRIcontextDestroy (baseContext=0x58ac650) at ../../glx/glxdri2.c:192 context = 0x58ac650 screen = 0x54d4d60 #5 0x00007f167fb7382a in __glXFreeContext (cx=0x58ac650) at ../../glx/glxext.c:211 No locals. #6 0x00007f167fb73528 in ContextGone (cx=0x58ac650, id=75497875) at ../../glx/glxext.c:110 No locals. #7 0x000000000042841a in FreeResourceByType (id=75497875, type=53, skipFree=0) at ../../dix/resource.c:598 cid = 36 res = 0x6afee90 prev = 0x728b7e0 head = 0x728b7e0 #8 0x00007f167fb69ac4 in __glXDisp_DestroyContext (cl=0x64c47e0, pc=0x8abe130 "\231\4\2") at ../../glx/glxcmds.c:370 req = 0x8abe130 glxc = 0x58ac650 err = 0 #9 0x00007f167fb740e7 in __glXDispatch (client=0x6140df0) at ../../glx/glxext.c:578 rendering = 0 '\0' stuff = 0x8abe130 opcode = 4 '\4' proc = 0x7f167fb69a56 <__glXDisp_DestroyContext> cl = 0x64c47e0 retval = 88979584 #10 0x000000000044d785 in Dispatch () at ../../dix/dispatch.c:426 clientReady = 0x577c070 result = 0 client = 0x6140df0 nready = 0 icheck = 0x881630 start_tick = 3360 #11 0x000000000042694e in main (argc=8, argv=0x7fff3498c978, envp=0x7fff3498c9c0) at ../../dix/main.c:283 i = 1 alwaysCheckForInput = {0, 1} (gdb) print irb $1 = (struct intel_renderbuffer *) 0x404 (gdb) print *irb Cannot access memory at address 0x404 (gdb) print *(struct gl_framebuffer*) 0x6b42a00 $5 = {Mutex = {__data = {__lock = 808284205, __count = 1869834541, __owner = 33, __nusers = 0, __kind = 108634032, __spins = 0, __list = {__prev = 0x71b5d40, __next = 0x20}}, __size = "-p-0-iso!\0\0\0\0\0\0\0\260\237y\6\0\0\0\0@]\33\a\0\0\0\0 \0\0\0\0\0\0", __align = 8030878203334455341}, Name = 176, RefCount = 0, DeletePending = 0 '\0', Visual = {next = 0x0, rgbMode = 0 '\0', floatMode = 208 '\320', colorIndexMode = 87 'W', doubleBufferMode = 0, stereoMode = 0, haveAccumBuffer = 0 '\0', haveDepthBuffer = 0 '\0', haveStencilBuffer = 0 '\0', redBits = 41314784, greenBits = 0, blueBits = 863, alphaBits = 0, redMask = 1, greenMask = 863, blueMask = 2131522285, alphaMask = 32534, rgbBits = 0, indexBits = -1, accumRedBits = 0, accumGreenBits = 0, accumBlueBits = 0, accumAlphaBits = 0, depthBits = 26670, stencilBits = 0, numAuxBuffers = 0, level = 0, pixmapMode = 0, visualID = 0, visualType = 0, visualRating = 0, transparentPixel = 2088636416, transparentRed = 32534, transparentGreen = 2088620032, transparentBlue = 32534, transparentAlpha = 102012056, transparentIndex = 0, sampleBuffers = 41315088, samples = 0, drawableType = 65536, renderType = 16384, xRenderable = 0, fbconfigID = 0, maxPbufferWidth = 33937, maxPbufferHeight = 0, maxPbufferPixels = 88999216, optimalPbufferWidth = 0, optimalPbufferHeight = 4, visualSelectGroup = 0, swapMethod = 75497872, screen = 0, bindToTextureRgb = 41318512, bindToTextureRgba = 0, bindToMipmapTexture = 103284736, bindToTextureTargets = 256, yInverted = 256}, Initialized = 104 'h', Width = 0, Height = 112492392, _Xmin = 0, _Xmax = 112503656, _Ymin = 0, _Ymax = 112479080, _DepthMax = 0, _DepthMaxF = 6.78839263e-35, _MRD = 0, _Status = 112501608, Attachment = {{Type = 112470888, Complete = 0 '\0', Renderbuffer = 0x6b45768, Texture = 0x6b48368, TextureLevel = 103350304, CubeMapFace = 0, Zoffset = 0}, { Type = 0, Complete = 0 '\0', Renderbuffer = 0x0, Texture = 0x0, TextureLevel = 0, CubeMapFace = 0, Zoffset = 257}, { Type = 0, Complete = 0 '\0', Renderbuffer = 0x0, Texture = 0x0, TextureLevel = 514, CubeMapFace = 0, Zoffset = 0}, { Type = 0, Complete = 0 '\0', Renderbuffer = 0x0, Texture = 0x303, TextureLevel = 0, CubeMapFace = 0, Zoffset = 0}, { Type = 0, Complete = 0 '\0', Renderbuffer = 0x404, Texture = 0x0, TextureLevel = 0, CubeMapFace = 0, Zoffset = 0}, { Type = 1285, Complete = 0 '\0', Renderbuffer = 0x0, Texture = 0x0, TextureLevel = 0, CubeMapFace = 0, Zoffset = 1542}, { Type = 0, Complete = 0 '\0', Renderbuffer = 0x0, Texture = 0x0, TextureLevel = 1799, CubeMapFace = 0, Zoffset = 0}, { Type = 0, Complete = 0 '\0', Renderbuffer = 0x0, Texture = 0x808, TextureLevel = 0, CubeMapFace = 0, Zoffset = 0}, { Type = 0, Complete = 0 '\0', Renderbuffer = 0x909, Texture = 0x0, TextureLevel = 0, CubeMapFace = 0, Zoffset = 0}, { Type = 2570, Complete = 0 '\0', Renderbuffer = 0x0, Texture = 0x0, TextureLevel = 0, CubeMapFace = 0, Zoffset = 2827}, { Type = 0, Complete = 0 '\0', Renderbuffer = 0x0, Texture = 0x0, TextureLevel = 3084, CubeMapFace = 0, Zoffset = 0}, { Type = 0, Complete = 0 '\0', Renderbuffer = 0x0, Texture = 0xd0d, TextureLevel = 0, CubeMapFace = 0, Zoffset = 0}, { Type = 0, Complete = 0 '\0', Renderbuffer = 0xe0e, Texture = 0x0, TextureLevel = 0, CubeMapFace = 0, Zoffset = 0}, { Type = 3855, Complete = 0 '\0', Renderbuffer = 0x0, Texture = 0x0, TextureLevel = 0, CubeMapFace = 0, Zoffset = 4112}, { Type = 0, Complete = 0 '\0', Renderbuffer = 0x0, Texture = 0x0, TextureLevel = 4369, CubeMapFace = 0, Zoffset = 0}, { Type = 0, Complete = 0 '\0', Renderbuffer = 0x0, Texture = 0x1212, TextureLevel = 0, CubeMapFace = 0, Zoffset = 0}}, ColorDrawBuffer = {0, 0, 4883, 0}, ColorReadBuffer = 0, _NumColorDrawBuffers = 0, _ColorDrawBufferIndexes = {0, 0, 0, 0}, _ColorReadBufferIndex = 5140, _ColorDrawBuffers = {0x0, 0x0, 0x0, 0x1515}, _ColorReadBuffer = 0x0, _DepthBuffer = 0x0, _StencilBuffer = 0x0, Delete = 0x1616} (gdb) q The program is running. Quit anyway (and detach it)? (y or n) LND: Sending signal 11 to Thread 0x7f1682b626f0 (LWP 4053) Detaching from program: /usr/bin/Xorg, process 4053