<part id="running-mutter"> <title>Running Mutter</title> <partintro> <section id="environment-variables"> <title>Environment Variables</title> <para> Mutter automatically checks environment variables during its initialization. These environment variables are meant as debug tools or overrides for default behaviours: </para> <variablelist> <varlistentry> <term>MUTTER_VERBOSE</term> <listitem> <para>Enable verbose mode, in which more information is printed to the console. Mutter needs to be built with the --enable-verbose-mode option (enabled by default). For more fine-grained control of the output, see meta_add_verbose_topic().</para> </listitem> </varlistentry> <varlistentry> <term>MUTTER_DEBUG</term> <listitem> <para>Traps and prints X errors to the console.</para> </listitem> </varlistentry> <varlistentry> <term>MUTTER_G_FATAL_WARNINGS</term> <listitem> <para>Causes any logging from the domains Mutter, Gtk, Gdk, Pango or GLib to terminate the process (only when using the log functions in GLib).</para> </listitem> </varlistentry> <varlistentry> <term>MUTTER_USE_LOGFILE</term> <listitem> <para>Log all messages to a temporary file.</para> </listitem> </varlistentry> <varlistentry> <term>MUTTER_DEBUG_XINERAMA</term> <listitem> <para>Log extra information about support of the XINERAMA extension.</para> </listitem> </varlistentry> <varlistentry> <term>MUTTER_DEBUG_SM</term> <listitem> <para>Log extra information about session management.</para> </listitem> </varlistentry> <varlistentry> <term>MUTTER_DEBUG_BUTTON_GRABS</term> <listitem> <para>Log extra information about button grabs.</para> </listitem> </varlistentry> <varlistentry> <term>MUTTER_SYNC</term> <listitem> <para>Call XSync after each X call.</para> </listitem> </varlistentry> <varlistentry> <term>MUTTER_DISPLAY</term> <listitem> <para>Name of the X11 display to use.</para> </listitem> </varlistentry> <varlistentry> <term>META_DISABLE_MIPMAPS</term> <listitem> <para>Disable use of mipmaps for the textures that back window pixmaps.</para> </listitem> </varlistentry> <varlistentry> <term>MUTTER_USE_STATIC_GRAVITY</term> <listitem> <para>Enable support for clients with static bit-gravity.</para> </listitem> </varlistentry> <varlistentry> <term>MUTTER_WM_CLASS_FILTER</term> <listitem> <para>Comma-separated list of WM_CLASS names to which to restrict Mutter to.</para> </listitem> </varlistentry> <varlistentry> <term>MUTTER_DISABLE_FALLBACK_COLOR</term> <listitem> <para>Disable fallback for themed colors, for easier detection of typographical errors.</para> </listitem> </varlistentry> </variablelist> </section> </partintro> </part>