GNU gdb (GDB) 7.7 Copyright (C) 2014 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-unknown-linux-gnu". Type "show configuration" for configuration details. For bug reporting instructions, please see: . Find the GDB manual and other documentation resources online at: . For help, type "help". Type "apropos word" to search for commands related to "word"... Reading symbols from /usr/bin/Xorg...(no debugging symbols found)...done. (gdb) attach 4346 Attaching to program: /usr/bin/Xorg, process 346 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/lib/libudev.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libudev.so.1 Reading symbols from /usr/lib/libgcrypt.so.20...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libgcrypt.so.20 Reading symbols from /usr/lib/libdl.so.2...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libdl.so.2 Reading symbols from /usr/lib/libpciaccess.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libpciaccess.so.0 Reading symbols from /usr/lib/libpthread.so.0...(no debugging symbols found)...done. [Thread debugging using libthread_db enabled] Using host libthread_db library "/usr/lib/libthread_db.so.1". Loaded symbols for /usr/lib/libpthread.so.0 Reading symbols from /usr/lib/libdrm.so.2...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libdrm.so.2 Reading symbols from /usr/lib/libpixman-1.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libpixman-1.so.0 Reading symbols from /usr/lib/libXfont.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libXfont.so.1 Reading symbols from /usr/lib/libXau.so.6...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libXau.so.6 Reading symbols from /usr/lib/libxshmfence.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libxshmfence.so.1 Reading symbols from /usr/lib/libXdmcp.so.6...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libXdmcp.so.6 Reading symbols from /usr/lib/libm.so.6...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libm.so.6 Reading symbols from /usr/lib/libc.so.6...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libc.so.6 Reading symbols from /usr/lib/librt.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib/librt.so.1 Reading symbols from /usr/lib/libgpg-error.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libgpg-error.so.0 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 /usr/lib/libfreetype.so.6...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libfreetype.so.6 Reading symbols from /usr/lib/libz.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libz.so.1 Reading symbols from /usr/lib/libfontenc.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libfontenc.so.1 Reading symbols from /usr/lib/libbz2.so.1.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libbz2.so.1.0 Reading symbols from /usr/lib/libpng16.so.16...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libpng16.so.16 Reading symbols from /usr/lib/libharfbuzz.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libharfbuzz.so.0 Reading symbols from /usr/lib/libglib-2.0.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libglib-2.0.so.0 Reading symbols from /usr/lib/libgraphite2.so.3...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libgraphite2.so.3 Reading symbols from /usr/lib/libpcre.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libpcre.so.1 Reading symbols from /usr/lib/libgcc_s.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libgcc_s.so.1 Reading symbols from /usr/lib/xorg/modules/extensions/libglx.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/xorg/modules/extensions/libglx.so Reading symbols from /usr/lib/libnvidia-tls.so.337.12...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libnvidia-tls.so.337.12 Reading symbols from /usr/lib/libnvidia-glcore.so.337.12...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libnvidia-glcore.so.337.12 Reading symbols from /usr/lib/xorg/modules/drivers/nvidia_drv.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/xorg/modules/drivers/nvidia_drv.so Reading symbols from /usr/lib/xorg/modules/libfb.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/xorg/modules/libfb.so Reading symbols from /usr/lib/xorg/modules/libwfb.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/xorg/modules/libwfb.so Reading symbols from /usr/lib/xorg/modules/input/evdev_drv.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/xorg/modules/input/evdev_drv.so Reading symbols from /usr/lib/libmtdev.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libmtdev.so.1 0x00007f18338f3a0b in ?? () from /usr/lib/xorg/modules/drivers/nvidia_drv.so (gdb) backtrace full #0 0x00007f18338f3a0b in ?? () from /usr/lib/xorg/modules/drivers/nvidia_drv.so No symbol table info available. #1 0x00007f18338f3a97 in ?? () from /usr/lib/xorg/modules/drivers/nvidia_drv.so No symbol table info available. #2 0x00007f18338f41a5 in ?? () from /usr/lib/xorg/modules/drivers/nvidia_drv.so No symbol table info available. #3 0x00007f183396aa81 in ?? () from /usr/lib/xorg/modules/drivers/nvidia_drv.so No symbol table info available. #4 0x00007f183396ad8d in ?? () from /usr/lib/xorg/modules/drivers/nvidia_drv.so No symbol table info available. #5 0x00007f1833900488 in ?? () from /usr/lib/xorg/modules/drivers/nvidia_drv.so No symbol table info available. #6 0x00007f18339234f5 in ?? () from /usr/lib/xorg/modules/drivers/nvidia_drv.so No symbol table info available. #7 0x00007f183393b361 in ?? () from /usr/lib/xorg/modules/drivers/nvidia_drv.so No symbol table info available. #8 0x00007f1833935e24 in ?? () from /usr/lib/xorg/modules/drivers/nvidia_drv.so No symbol table info available. #9 0x00007f1833936462 in ?? () from /usr/lib/xorg/modules/drivers/nvidia_drv.so No symbol table info available. #10 0x00007f18338f4194 in ?? () from /usr/lib/xorg/modules/drivers/nvidia_drv.so No symbol table info available. #11 0x00007f18338f408a in ?? () from /usr/lib/xorg/modules/drivers/nvidia_drv.so No symbol table info available. #12 0x00007f183396bc73 in ?? () from /usr/lib/xorg/modules/drivers/nvidia_drv.so No symbol table info available. #13 0x00007f1833dfa312 in ?? () from /usr/lib/xorg/modules/drivers/nvidia_drv.so No symbol table info available. #14 0x00007f1833dfbb1a in ?? () from /usr/lib/xorg/modules/drivers/nvidia_drv.so No symbol table info available. #15 0x000000000051071c in ?? () No symbol table info available. #16 0x00007f1833e054b6 in ?? () from /usr/lib/xorg/modules/drivers/nvidia_drv.so No symbol table info available. #17 0x00007f1833e08a68 in ?? () from /usr/lib/xorg/modules/drivers/nvidia_drv.so No symbol table info available. #18 0x00000000005061c3 in ?? () No symbol table info available. #19 0x0000000000435c8e in ?? () No symbol table info available. #20 0x0000000000439aaa in ?? () No symbol table info available. #21 0x00007f1839797b05 in __libc_start_main () from /usr/lib/libc.so.6 No symbol table info available. #22 0x000000000042507e in _start () No symbol table info available. (gdb) exitquit A debugging session is active. Inferior 1 [process 346] will be detached. Quit anyway? (y or n) Detaching from program: /usr/bin/Xorg, process 346