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<div class="titlepage"><div><div><h1 class="title">
<a name="running-mutter"></a>Part II. Running Mutter</h1></div></div></div>
<div class="partintro">
<div></div>
<div class="section">
<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="environment-variables"></a>Environment Variables</h2></div></div></div>
<p>
Mutter automatically checks environment variables during
its initialization. These environment variables are meant
as debug tools or overrides for default behaviours:
</p>
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<td><p><span class="term">MUTTER_VERBOSE</span></p></td>
<td><p>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 <a class="link" href="meta-Utility-functions.html#meta-add-verbose-topic" title="meta_add_verbose_topic ()"><code class="function">meta_add_verbose_topic()</code></a>.</p></td>
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<td><p><span class="term">MUTTER_DEBUG</span></p></td>
<td><p>Traps and prints X errors to the console.</p></td>
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<td><p><span class="term">MUTTER_G_FATAL_WARNINGS</span></p></td>
<td><p>Causes any logging from the domains Mutter, Gtk, Gdk, Pango or GLib to terminate the process (only when using the log functions in GLib).</p></td>
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<td><p><span class="term">MUTTER_USE_LOGFILE</span></p></td>
<td><p>Log all messages to a temporary file.</p></td>
</tr>
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<td><p><span class="term">MUTTER_DEBUG_XINERAMA</span></p></td>
<td><p>Log extra information about support of the XINERAMA extension.</p></td>
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<td><p><span class="term">MUTTER_DEBUG_SM</span></p></td>
<td><p>Log extra information about session management.</p></td>
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<td><p><span class="term">MUTTER_DEBUG_BUTTON_GRABS</span></p></td>
<td><p>Log extra information about button grabs.</p></td>
</tr>
<tr>
<td><p><span class="term">MUTTER_SYNC</span></p></td>
<td><p>Call XSync after each X call.</p></td>
</tr>
<tr>
<td><p><span class="term">MUTTER_DISPLAY</span></p></td>
<td><p>Name of the X11 display to use.</p></td>
</tr>
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<td><p><span class="term">META_DISABLE_MIPMAPS</span></p></td>
<td><p>Disable use of mipmaps for the textures that back window pixmaps.</p></td>
</tr>
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<td><p><span class="term">MUTTER_USE_STATIC_GRAVITY</span></p></td>
<td><p>Enable support for clients with static bit-gravity.</p></td>
</tr>
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<td><p><span class="term">MUTTER_WM_CLASS_FILTER</span></p></td>
<td><p>Comma-separated list of WM_CLASS names to which to restrict Mutter to.</p></td>
</tr>
<tr>
<td><p><span class="term">MUTTER_DISABLE_FALLBACK_COLOR</span></p></td>
<td><p>Disable fallback for themed colors, for easier detection of typographical errors.</p></td>
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