[root@laptop phani]# gdb ModemManager 17907 GNU gdb (GDB) 7.5.1 Copyright (C) 2012 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". For bug reporting instructions, please see: ... Reading symbols from /usr/sbin/ModemManager...(no debugging symbols found)...done. Attaching to program: /usr/sbin/ModemManager, process 17907 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/libgudev-1.0.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libgudev-1.0.so.0 Reading symbols from /usr/lib/libmm-glib.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libmm-glib.so.0 Reading symbols from /usr/lib/libgmodule-2.0.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libgmodule-2.0.so.0 Reading symbols from /usr/lib/libpolkit-gobject-1.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libpolkit-gobject-1.so.0 Reading symbols from /usr/lib/libqmi-glib.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libqmi-glib.so.0 Reading symbols from /usr/lib/libgio-2.0.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libgio-2.0.so.0 Reading symbols from /usr/lib/libgobject-2.0.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libgobject-2.0.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/libpthread.so.0...(no debugging symbols found)...done. [New LWP 17910] [New LWP 17908] [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/libc.so.6...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libc.so.6 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/libdl.so.2...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libdl.so.2 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/libpcre.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libpcre.so.1 Reading symbols from /usr/lib/libsystemd-login.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libsystemd-login.so.0 Reading symbols from /usr/lib/libffi.so.6...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libffi.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/libresolv.so.2...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libresolv.so.2 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/ModemManager/libmm-plugin-generic.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/ModemManager/libmm-plugin-generic.so Reading symbols from /usr/lib/ModemManager/libmm-plugin-novatel.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/ModemManager/libmm-plugin-novatel.so Reading symbols from /usr/lib/ModemManager/libmm-plugin-zte.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/ModemManager/libmm-plugin-zte.so Reading symbols from /usr/lib/ModemManager/libmm-plugin-via.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/ModemManager/libmm-plugin-via.so Reading symbols from /usr/lib/ModemManager/libmm-plugin-huawei.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/ModemManager/libmm-plugin-huawei.so Reading symbols from /usr/lib/ModemManager/libmm-plugin-samsung.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/ModemManager/libmm-plugin-samsung.so Reading symbols from /usr/lib/ModemManager/libmm-plugin-cinterion.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/ModemManager/libmm-plugin-cinterion.so Reading symbols from /usr/lib/ModemManager/libmm-plugin-motorola.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/ModemManager/libmm-plugin-motorola.so Reading symbols from /usr/lib/ModemManager/libmm-plugin-simtech.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/ModemManager/libmm-plugin-simtech.so Reading symbols from /usr/lib/ModemManager/libmm-plugin-pantech.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/ModemManager/libmm-plugin-pantech.so Reading symbols from /usr/lib/ModemManager/libmm-plugin-novatel-lte.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/ModemManager/libmm-plugin-novatel-lte.so Reading symbols from /usr/lib/ModemManager/libmm-plugin-linktop.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/ModemManager/libmm-plugin-linktop.so Reading symbols from /usr/lib/ModemManager/libmm-plugin-wavecom.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/ModemManager/libmm-plugin-wavecom.so Reading symbols from /usr/lib/ModemManager/libmm-plugin-sierra.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/ModemManager/libmm-plugin-sierra.so Reading symbols from /usr/lib/ModemManager/libmm-plugin-longcheer.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/ModemManager/libmm-plugin-longcheer.so Reading symbols from /usr/lib/ModemManager/libmm-plugin-altair-lte.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/ModemManager/libmm-plugin-altair-lte.so Reading symbols from /usr/lib/ModemManager/libmm-plugin-iridium.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/ModemManager/libmm-plugin-iridium.so Reading symbols from /usr/lib/ModemManager/libmm-plugin-nokia.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/ModemManager/libmm-plugin-nokia.so Reading symbols from /usr/lib/ModemManager/libmm-plugin-hso.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/ModemManager/libmm-plugin-hso.so Reading symbols from /usr/lib/ModemManager/libmm-plugin-x22x.so...(no debugging symbols found)...done. [root@laptop phani]# gdb ModemManager 18495 GNU gdb (GDB) 7.5.1 Copyright (C) 2012 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". For bug reporting instructions, please see: ... Reading symbols from /usr/sbin/ModemManager...(no debugging symbols found)...done. Attaching to program: /usr/sbin/ModemManager, process 18495 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/libgudev-1.0.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libgudev-1.0.so.0 Reading symbols from /usr/lib/libmm-glib.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libmm-glib.so.0 Reading symbols from /usr/lib/libgmodule-2.0.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libgmodule-2.0.so.0 Reading symbols from /usr/lib/libpolkit-gobject-1.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libpolkit-gobject-1.so.0 Reading symbols from /usr/lib/libqmi-glib.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libqmi-glib.so.0 Reading symbols from /usr/lib/libgio-2.0.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libgio-2.0.so.0 Reading symbols from /usr/lib/libgobject-2.0.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libgobject-2.0.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/libpthread.so.0...(no debugging symbols found)...done. [New LWP 18498] [New LWP 18496] [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/libc.so.6...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libc.so.6 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/libdl.so.2...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libdl.so.2 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/libpcre.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libpcre.so.1 Reading symbols from /usr/lib/libsystemd-login.so.0...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libsystemd-login.so.0 Reading symbols from /usr/lib/libffi.so.6...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libffi.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/libresolv.so.2...(no debugging symbols found)...done. Loaded symbols for /usr/lib/libresolv.so.2 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/ModemManager/libmm-plugin-generic.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/ModemManager/libmm-plugin-generic.so Reading symbols from /usr/lib/ModemManager/libmm-plugin-novatel.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/ModemManager/libmm-plugin-novatel.so Reading symbols from /usr/lib/ModemManager/libmm-plugin-zte.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/ModemManager/libmm-plugin-zte.so Reading symbols from /usr/lib/ModemManager/libmm-plugin-via.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/ModemManager/libmm-plugin-via.so Reading symbols from /usr/lib/ModemManager/libmm-plugin-huawei.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/ModemManager/libmm-plugin-huawei.so Reading symbols from /usr/lib/ModemManager/libmm-plugin-samsung.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/ModemManager/libmm-plugin-samsung.so Reading symbols from /usr/lib/ModemManager/libmm-plugin-cinterion.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/ModemManager/libmm-plugin-cinterion.so Reading symbols from /usr/lib/ModemManager/libmm-plugin-motorola.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/ModemManager/libmm-plugin-motorola.so Reading symbols from /usr/lib/ModemManager/libmm-plugin-simtech.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/ModemManager/libmm-plugin-simtech.so Reading symbols from /usr/lib/ModemManager/libmm-plugin-pantech.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/ModemManager/libmm-plugin-pantech.so Reading symbols from /usr/lib/ModemManager/libmm-plugin-novatel-lte.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/ModemManager/libmm-plugin-novatel-lte.so Reading symbols from /usr/lib/ModemManager/libmm-plugin-linktop.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/ModemManager/libmm-plugin-linktop.so Reading symbols from /usr/lib/ModemManager/libmm-plugin-wavecom.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/ModemManager/libmm-plugin-wavecom.so Reading symbols from /usr/lib/ModemManager/libmm-plugin-sierra.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/ModemManager/libmm-plugin-sierra.so Reading symbols from /usr/lib/ModemManager/libmm-plugin-longcheer.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/ModemManager/libmm-plugin-longcheer.so Reading symbols from /usr/lib/ModemManager/libmm-plugin-altair-lte.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/ModemManager/libmm-plugin-altair-lte.so Reading symbols from /usr/lib/ModemManager/libmm-plugin-iridium.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/ModemManager/libmm-plugin-iridium.so Reading symbols from /usr/lib/ModemManager/libmm-plugin-nokia.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/ModemManager/libmm-plugin-nokia.so Reading symbols from /usr/lib/ModemManager/libmm-plugin-hso.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/ModemManager/libmm-plugin-hso.so Reading symbols from /usr/lib/ModemManager/libmm-plugin-x22x.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/ModemManager/libmm-plugin-x22x.so Reading symbols from /usr/lib/ModemManager/libmm-plugin-anydata.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/ModemManager/libmm-plugin-anydata.so Reading symbols from /usr/lib/ModemManager/libmm-plugin-option.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/ModemManager/libmm-plugin-option.so Reading symbols from /usr/lib/ModemManager/libmm-plugin-gobi.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/ModemManager/libmm-plugin-gobi.so Reading symbols from /usr/lib/ModemManager/libmm-plugin-nokia-icera.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/ModemManager/libmm-plugin-nokia-icera.so Reading symbols from /usr/lib/ModemManager/libmm-plugin-mbm.so...(no debugging symbols found)...done. Loaded symbols for /usr/lib/ModemManager/libmm-plugin-mbm.so warning: no loadable sections found in added symbol-file system-supplied DSO at 0x7fff193fe000 0x00007fd07085f09d in poll () from /usr/lib/libc.so.6 (gdb) q A debugging session is active. Inferior 1 [process 18495] will be detached. Quit anyway? (y or n) y Detaching from program: /usr/sbin/ModemManager, process 18495 [root@laptop phani]# systemctl stop ModemManager.service NetworkManager.service