Also with --help-all, I don't see an option 'debug': $ brasero --help-all Usage: brasero [OPTION...] [URI] [URI] ... Help Options: -h, --help Show help options --help-all Show all help options --help-sm-client Show session management options --help-gtk Show GTK+ Options --help-brasero-media Display options for Brasero-media library --help-brasero-burn Display options for Brasero-burn library --help-gst Show GStreamer Options Session management options: --sm-client-disable Disable connection to session manager --sm-client-state-file=FILE Specify file containing saved configuration --sm-client-id=ID Specify session management ID GTK+ Options --class=CLASS Program class as used by the window manager --name=NAME Program name as used by the window manager --screen=SCREEN X screen to use --sync Make X calls synchronous --gtk-module=MODULES Load additional GTK+ modules --g-fatal-warnings Make all warnings fatal Brasero optical media library --brasero-media-debug Display debug statements on stdout for Brasero media library Brasero media burning library -g, --brasero-burn-debug Display debug statements on stdout for Brasero burn library GStreamer Options --gst-version Print the GStreamer version --gst-fatal-warnings Make all warnings fatal --gst-debug-help Print available debug categories and exit --gst-debug-level=LEVEL Default debug level from 1 (only error) to 5 (anything) or 0 for no output --gst-debug=LIST Comma-separated list of category_name:level pairs to set specific levels for the individual categories. Example: GST_AUTOPLUG:5,GST_ELEMENT_*:3 --gst-debug-no-color Disable colored debugging output --gst-debug-disable Disable debugging --gst-plugin-spew Enable verbose plugin loading diagnostics --gst-plugin-path=PATHS Colon-separated paths containing plugins --gst-plugin-load=PLUGINS Comma-separated list of plugins to preload in addition to the list stored in environment variable GST_PLUGIN_PATH --gst-disable-segtrap Disable trapping of segmentation faults during plugin loading --gst-disable-registry-update Disable updating the registry --gst-disable-registry-fork Disable the use of fork() while scanning the registry Application Options: -p, --project=PROJECT Open the specified project -l, --playlist=PLAYLIST Open the specified playlist as an audio project -a, --audio Open an audio project adding the URIs given on the command line -d, --data Open a data project adding the URIs given on the command line -c, --copy=PATH TO DEVICE Copy a disc -j, --cover=PATH TO COVER Cover to use -o, --video Open a video project adding the URIs given on the command line -i, --image=PATH TO PLAYLIST Uri of an image file to be burnt (autodetected) -e, --empty Force brasero to display the project selection page -b, --blank Open the blank disc dialog -k, --check Open the check disc dialog -n, --ncb Burn the contents of burn:// URI -r, --burn-and-remove-project=PATH Burn the specified project and REMOVE it. This option is mainly useful for integration use with other applications. -x, --transient-for The XID of the parent window --display=DISPLAY X display to use On Thu, Nov 12, 2009 at 15:19, Ernst Blaauw