# gdb --pid `pidof X` GNU gdb (Gentoo 7.6.2 p1) 7.6.2 Copyright (C) 2013 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-pc-linux-gnu". For bug reporting instructions, please see: . Attaching to process 10150 Reading symbols from /usr/bin/Xorg...(no debugging symbols found)...done. warning: Could not load shared library symbols for linux-vdso.so.1. Do you need "set solib-search-path" or "set sysroot"? Reading symbols from /usr/lib64/libudev.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libudev.so.1 Reading symbols from /usr/lib64/libcrypto.so.1.0.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libcrypto.so.1.0.0 Reading symbols from /lib64/libdl.so.2...(no debugging symbols found)...done. Loaded symbols for /lib64/libdl.so.2 Reading symbols from /usr/lib64/libpciaccess.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libpciaccess.so.0 Reading symbols from /lib64/libpthread.so.0...(no debugging symbols found)...done. [New LWP 10155] [New LWP 10154] [New LWP 10153] [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib64/libthread_db.so.1". Loaded symbols for /lib64/libpthread.so.0 Reading symbols from /usr/lib64/libdrm.so.2...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libdrm.so.2 Reading symbols from /usr/lib64/libpixman-1.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libpixman-1.so.0 Reading symbols from /usr/lib64/libXfont.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libXfont.so.1 Reading symbols from /usr/lib64/libXau.so.6...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libXau.so.6 Reading symbols from /usr/lib64/libxshmfence.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libxshmfence.so.1 Reading symbols from /usr/lib64/libXdmcp.so.6...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libXdmcp.so.6 Reading symbols from /lib64/libm.so.6...(no debugging symbols found)...done. Loaded symbols for /lib64/libm.so.6 Reading symbols from /lib64/libc.so.6...(no debugging symbols found)...done. Loaded symbols for /lib64/libc.so.6 Reading symbols from /lib64/librt.so.1...(no debugging symbols found)...done. Loaded symbols for /lib64/librt.so.1 Reading symbols from /lib64/ld-linux-x86-64.so.2...(no debugging symbols found)...done. Loaded symbols for /lib64/ld-linux-x86-64.so.2 Reading symbols from /lib64/libz.so.1...(no debugging symbols found)...done. Loaded symbols for /lib64/libz.so.1 Reading symbols from /lib64/libbz2.so.1...(no debugging symbols found)...done. Loaded symbols for /lib64/libbz2.so.1 Reading symbols from /usr/lib64/libfontenc.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libfontenc.so.1 Reading symbols from /usr/lib/gcc/x86_64-pc-linux-gnu/4.7.3/libgcc_s.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib/gcc/x86_64-pc-linux-gnu/4.7.3/libgcc_s.so.1 Reading symbols from /usr/lib64/xorg/modules/libglamoregl.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/xorg/modules/libglamoregl.so Reading symbols from /usr/lib64/libEGL.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libEGL.so.1 Reading symbols from /usr/lib64/libgbm.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libgbm.so.1 Reading symbols from /usr/lib64/libglamor.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libglamor.so.0 Reading symbols from /usr/lib64/libX11-xcb.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libX11-xcb.so.1 Reading symbols from /usr/lib64/libxcb-dri2.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libxcb-dri2.so.0 Reading symbols from /usr/lib64/libxcb-xfixes.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libxcb-xfixes.so.0 Reading symbols from /usr/lib64/libxcb.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libxcb.so.1 Reading symbols from /usr/lib64/libGL.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libGL.so.1 Reading symbols from /usr/lib64/libglapi.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libglapi.so.0 Reading symbols from /usr/lib64/libXext.so.6...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libXext.so.6 Reading symbols from /usr/lib64/libXdamage.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libXdamage.so.1 Reading symbols from /usr/lib64/libXfixes.so.3...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libXfixes.so.3 Reading symbols from /usr/lib64/libX11.so.6...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libX11.so.6 Reading symbols from /usr/lib64/libxcb-glx.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libxcb-glx.so.0 Reading symbols from /usr/lib64/libXxf86vm.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libXxf86vm.so.1 Reading symbols from /usr/lib64/xorg/modules/extensions/libglx.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/xorg/modules/extensions/libglx.so Reading symbols from /usr/lib64/xorg/modules/drivers/intel_drv.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/xorg/modules/drivers/intel_drv.so Reading symbols from /usr/lib64/xorg/modules/drivers/ati_drv.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/xorg/modules/drivers/ati_drv.so Reading symbols from /usr/lib64/xorg/modules/drivers/radeon_drv.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/xorg/modules/drivers/radeon_drv.so Reading symbols from /usr/lib64/libdrm_radeon.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libdrm_radeon.so.1 Reading symbols from /usr/lib64/xorg/modules/libexa.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/xorg/modules/libexa.so Reading symbols from /usr/lib64/xorg/modules/libfb.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/xorg/modules/libfb.so Reading symbols from /usr/lib64/dri/i965_dri.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/dri/i965_dri.so Reading symbols from /usr/lib64/libdrm_intel.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libdrm_intel.so.1 Reading symbols from /usr/lib64/libexpat.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libexpat.so.1 Reading symbols from /usr/lib/gcc/x86_64-pc-linux-gnu/4.7.3/libstdc++.so.6...(no debugging symbols found)...done. Loaded symbols for /usr/lib/gcc/x86_64-pc-linux-gnu/4.7.3/libstdc++.so.6 Reading symbols from /usr/lib64/xorg/modules/input/evdev_drv.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/xorg/modules/input/evdev_drv.so Reading symbols from /usr/lib64/libmtdev.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/libmtdev.so.1 Reading symbols from /usr/lib64/xorg/modules/input/synaptics_drv.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib64/xorg/modules/input/synaptics_drv.so 0x00007f4eb446c413 in select () from /lib64/libc.so.6 (gdb) continue Continuing. Program received signal SIGSEGV, Segmentation fault. 0x00007f4eb11ec4f7 in ?? () from /usr/lib64/xorg/modules/drivers/intel_drv.so (gdb) bt full #0 0x00007f4eb11ec4f7 in ?? () from /usr/lib64/xorg/modules/drivers/intel_drv.so No symbol table info available. #1 0x0000000000561994 in ?? () No symbol table info available. #2 0x0000000000562336 in ?? () No symbol table info available. #3 0x0000000000562710 in DRI2GetBuffersWithFormat () No symbol table info available. #4 0x0000000000563fd5 in ?? () No symbol table info available. #5 0x000000000043bc7e in ?? () No symbol table info available. #6 0x000000000043fa0a in ?? () No symbol table info available. #7 0x00007f4eb43aabf5 in __libc_start_main () from /lib64/libc.so.6 No symbol table info available. #8 0x000000000042a541 in _start () No symbol table info available. (gdb) continue Continuing. [Thread 0x7f4eb6514880 (LWP 10150) exited] [Thread 0x7f4eb0a87700 (LWP 10153) exited] [Thread 0x7f4eafa85700 (LWP 10155) exited] [Inferior 1 (process 10150) exited with code 01] (gdb) quit