nick@flexo:~$ pgrep Xorg 6074 nick@flexo:~$ sudo gdb /usr/bin/Xorg [sudo] password for nick: GNU gdb 6.7.1-debian Copyright (C) 2007 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 "i486-linux-gnu"... Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1". (gdb) attach 6074 Attaching to program: /usr/bin/Xorg, process 6074 Reading symbols from /lib/tls/i686/cmov/libdl.so.2...done. Loaded symbols for /lib/tls/i686/cmov/libdl.so.2 Reading symbols from /usr/lib/libXfont.so.1...done. Loaded symbols for /usr/lib/libXfont.so.1 Reading symbols from /usr/lib/libXau.so.6...done. Loaded symbols for /usr/lib/libXau.so.6 Reading symbols from /usr/lib/libfontenc.so.1...done. Loaded symbols for /usr/lib/libfontenc.so.1 Reading symbols from /usr/lib/libpixman-1.so.0...done. Loaded symbols for /usr/lib/libpixman-1.so.0 Reading symbols from /usr/lib/libhal.so.1...done. Loaded symbols for /usr/lib/libhal.so.1 Reading symbols from /usr/lib/libdbus-1.so.3...done. Loaded symbols for /usr/lib/libdbus-1.so.3 Reading symbols from /usr/lib/libXdmcp.so.6...done. Loaded symbols for /usr/lib/libXdmcp.so.6 Reading symbols from /lib/tls/i686/cmov/libm.so.6...done. Loaded symbols for /lib/tls/i686/cmov/libm.so.6 Reading symbols from /lib/tls/i686/cmov/librt.so.1...done. Loaded symbols for /lib/tls/i686/cmov/librt.so.1 Reading symbols from /lib/libgcc_s.so.1...done. Loaded symbols for /lib/libgcc_s.so.1 Reading symbols from /lib/tls/i686/cmov/libc.so.6...done. Loaded symbols for /lib/tls/i686/cmov/libc.so.6 Reading symbols from /lib/ld-linux.so.2...done. Loaded symbols for /lib/ld-linux.so.2 Reading symbols from /usr/lib/libfreetype.so.6...done. Loaded symbols for /usr/lib/libfreetype.so.6 Reading symbols from /usr/lib/libz.so.1...done. Loaded symbols for /usr/lib/libz.so.1 Reading symbols from /lib/libusb-0.1.so.4...done. Loaded symbols for /lib/libusb-0.1.so.4 Reading symbols from /lib/tls/i686/cmov/libpthread.so.0...done. [Thread debugging using libthread_db enabled] [New Thread 0xb7c3b6b0 (LWP 6074)] Loaded symbols for /lib/tls/i686/cmov/libpthread.so.0 Reading symbols from /usr/lib/xorg/modules/libpcidata.so...Reading symbols from /usr/lib/debug/usr/lib/xorg/modules/libpcidata.so...done. done. Loaded symbols for /usr/lib/xorg/modules//libpcidata.so Reading symbols from /usr/lib/xorg/modules/extensions/libextmod.so...Reading symbols from /usr/lib/debug/usr/lib/xorg/modules/extensions/libextmod.so...done. done. Loaded symbols for /usr/lib/xorg/modules/extensions//libextmod.so Reading symbols from /usr/lib/xorg/modules/extensions/libdbe.so...Reading symbols from /usr/lib/debug/usr/lib/xorg/modules/extensions/libdbe.so...done. done. Loaded symbols for /usr/lib/xorg/modules/extensions//libdbe.so Reading symbols from /usr/lib/xorg/modules/extensions/libglx.so...Reading symbols from /usr/lib/debug/usr/lib/xorg/modules/extensions/libglx.so...done. done. Loaded symbols for /usr/lib/xorg/modules/extensions//libglx.so Reading symbols from /usr/lib/xorg/modules/fonts/libfreetype.so...Reading symbols from /usr/lib/debug/usr/lib/xorg/modules/fonts/libfreetype.so...done. done. Loaded symbols for /usr/lib/xorg/modules//fonts/libfreetype.so Reading symbols from /usr/lib/xorg/modules/extensions/librecord.so...Reading symbols from /usr/lib/debug/usr/lib/xorg/modules/extensions/librecord.so...done. done. Loaded symbols for /usr/lib/xorg/modules/extensions//librecord.so Reading symbols from /usr/lib/xorg/modules/extensions/libdri.so...Reading symbols from /usr/lib/debug/usr/lib/xorg/modules/extensions/libdri.so...done. done. Loaded symbols for /usr/lib/xorg/modules/extensions//libdri.so Reading symbols from /usr/lib/libdrm.so.2...done. Loaded symbols for /usr/lib/libdrm.so.2 Reading symbols from /usr/lib/xorg/modules/drivers/ati_drv.so...done. Loaded symbols for /usr/lib/xorg/modules/drivers//ati_drv.so Reading symbols from /usr/lib/xorg/modules/drivers/radeon_drv.so...done. Loaded symbols for /usr/lib/xorg/modules/drivers//radeon_drv.so Reading symbols from /usr/lib/xorg/modules/input/kbd_drv.so...done. Loaded symbols for /usr/lib/xorg/modules/input//kbd_drv.so Reading symbols from /usr/lib/xorg/modules/input/mouse_drv.so...done. Loaded symbols for /usr/lib/xorg/modules/input//mouse_drv.so Reading symbols from /usr/lib/xorg/modules/input/synaptics_drv.so...done. Loaded symbols for /usr/lib/xorg/modules/input//synaptics_drv.so Reading symbols from /usr/lib/xorg/modules/libvgahw.so...Reading symbols from /usr/lib/debug/usr/lib/xorg/modules/libvgahw.so...done. done. Loaded symbols for /usr/lib/xorg/modules//libvgahw.so Reading symbols from /usr/lib/xorg/modules/libint10.so...Reading symbols from /usr/lib/debug/usr/lib/xorg/modules/libint10.so...done. done. Loaded symbols for /usr/lib/xorg/modules//libint10.so Reading symbols from /usr/lib/xorg/modules/libfb.so...Reading symbols from /usr/lib/debug/usr/lib/xorg/modules/libfb.so...done. done. Loaded symbols for /usr/lib/xorg/modules//libfb.so Reading symbols from /usr/lib/xorg/modules/libxaa.so...Reading symbols from /usr/lib/debug/usr/lib/xorg/modules/libxaa.so...done. done. Loaded symbols for /usr/lib/xorg/modules//libxaa.so Reading symbols from /usr/lib/xorg/modules/multimedia/theatre_detect_drv.so...done. Loaded symbols for /usr/lib/xorg/modules/multimedia//theatre_detect_drv.so Reading symbols from /usr/lib/dri/r300_dri.so...done. Loaded symbols for /usr/lib/dri/r300_dri.so Reading symbols from /usr/lib/libexpat.so.1...done. Loaded symbols for /usr/lib/libexpat.so.1 0xb7f63410 in __kernel_vsyscall () (gdb) cont Continuing. Program received signal SIGINT, Interrupt. [Switching to Thread 0xb7c3b6b0 (LWP 6074)] 0xb7f63410 in __kernel_vsyscall () (gdb) backtrace full #0 0xb7f63410 in __kernel_vsyscall () No symbol table info available. #1 0xb7db1929 in ioctl () from /lib/tls/i686/cmov/libc.so.6 No symbol table info available. #2 0xb7b3ea8b in drmCommandWrite () from /usr/lib/libdrm.so.2 No symbol table info available. #3 0xb2dee3c2 in ?? () from /usr/lib/dri/r300_dri.so No symbol table info available. #4 0x00000008 in ?? () No symbol table info available. #5 0x00000017 in ?? () No symbol table info available. #6 0x083e0754 in ?? () No symbol table info available. #7 0x00000004 in ?? () No symbol table info available. #8 0x083e7010 in ?? () No symbol table info available. #9 0x00000001 in ?? () No symbol table info available. #10 0x083e0700 in ?? () No symbol table info available. #11 0xb2fc3e1c in ?? () from /usr/lib/dri/r300_dri.so ---Type to continue, or q to quit--- No symbol table info available. #12 0x083e7010 in ?? () No symbol table info available. #13 0x083df750 in ?? () No symbol table info available. #14 0xbfc4bb98 in ?? () No symbol table info available. #15 0xb2e139c8 in _mesa_Finish () from /usr/lib/dri/r300_dri.so No symbol table info available. Backtrace stopped: frame did not save the PC