I've struggled to get a backtrace as gdb hangs when using it against a running gnome-settings-daemon PID (not even responding to Ctrl+C), but when killing all running gnome-settings-daemon processes and then starting gdb with a new gnome-settings-daemon process, I got the following results:
GNU gdb (GDB) 7.1-ubuntu Copyright (C) 2010 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> 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". For bug reporting instructions, please see: <http://www.gnu.org/software/gdb/bugs/>... Reading symbols from /usr/bin/gnome-settings-daemon...(no debugging symbols found)...done. (gdb) handle SIG33 pass nostop noprint Signal Stop Print Pass to program Description SIG33 No No Yes Real-time event 33 (gdb) set pagination 0 (gdb) run Starting program: /usr/bin/gnome-settings-daemon [Thread debugging using libthread_db enabled] ** At this point, I added a new keyboard layout to the Keyboard Preferences dialogue and the CPU usage went up to 100% until I removed the new layout. I then executed 'killall gnome-settings-daemon' from a terminal. Program exited normally. (gdb) backtrace full No stack. (gdb) info registers The program has no registers now. (gdb) ** At this point, after realising that gdb didn't seem to have picked anything up, I added a new keyboard layout again in the Keyboard Preferences dialogue. The CPU usage went up to 100% and the following two lines were output from gdb: (gnome-settings-daemon:25101): GdkPixbuf-CRITICAL **: gdk_pixbuf_scale_simple: assertion `dest_width > 0' failed (gnome-settings-daemon:25101): GLib-GObject-CRITICAL **: g_object_unref: assertion `G_IS_OBJECT (object)' failed ** After this I attempted to use Ctrl+C to kill the process inside gdb, but at this point gdb hung and I was unable to continue debugging. I hope the above two lines are of some use. Please inform me of how I might be able to generate a proper stack trace if not. -- Adding additional keyboard layouts causes gnome-settings-daemon to use max CPU https://bugs.launchpad.net/bugs/587228 You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-settings-daemon in ubuntu. -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
