<divclass="box-info">The translation of this page isn't yet complete. Until it is, unfinished parts use the English original.</div>
<h1>Boot Loader</h1>
<p>Haiku's Boot Loader can help when you experience hardware related problems or want to choose which Haiku installation to start, if you have more than one (maybe on an installation CD or USB stick).<br/>
It's also handy after you installed a software component that acts up and prevents you from booting the system to remove it again. The <i>Disable user add-ons</i> option that's mentioned below, will start Haiku without loading user installed components, e.g. a driver.</p>
<p>To enter the Boot Loader options, you have to press and keep holding the <spanclass="key">SHIFT</span> key before the beginning of Haiku's boot process. If there's a boot manager installed, you can start holding <spanclass="key">SHIFT</span> before invoking the boot entry for Haiku. If Haiku is the only operating system on the machine, you can begin holding the key while still seeing boot messages from the BIOS.</p>
<tr><td><b>Select boot volume</b></td><td></td><td>Choose which Haiku installation to start.</td></tr>
<tr><td><b>Select safe mode options</b></td><td></td><td>There are several options to try in case of hardware related trouble or if the system becomes unstable or unbootable because of a misbehaving add-on. When moving the selection bar to an option, a short explanation appears at the bottom of the screen.</td></tr>
Puts the system into safe mode. This can be enabled independently from the other options.</p>
<p><spanclass="menu">Disable user add-ons</span><br/>
Prevents all user installed add-ons from being loaded. Only the add-ons in the system directory will be used. See <ahref="#troubleshooting">Troubleshooting</a> below.</p>
<p><spanclass="menu">Disable IDE DMA</span><br/>
Disables IDE DMA, increasing IDE compatibility at the expense of performance.</p>
Allows to select system files that shall be ignored. Useful e.g. to disable drivers temporarily. See <ahref="#troubleshooting">Troubleshooting</a> below.</p></td></tr>
<tr><td><b>Select debug options</b></td><td></td><td>Here you'll find several options that help with debugging or getting details for a <ahref="../welcome/en/bugreports.html">bug report</a>. Again, a short explanation for each option is displayed at the bottom.</td></tr>
<tr><tdclass="onelinetop"><b>Select fail safe video mode</b></td><td></td><td>If you had to activate the option <i>Use fail-safe video mode</i>, you can set resolution and color depth.</td></tr>
<p>If Haiku refuses to boot on your hardware from the get-go, try out setting different options under <spanclass="menu">Select safe mode options</span>. Consider filing a <ahref="../welcome/en/bugreports.html">bug report</a> in any case.</p>
<p>On the other hand, if Haiku only suddenly acts up after you have installed some software, especially hardware drivers, you have several options to get Haiku bootable again to make things right by uninstalling the offending package again:</p>
<ul>
<li><p>Activating <spanclass="menu">Safe mode</span> will prevent most servers, daemons and the UserBootScript from being started.</p></li>
<li><p>Activating <spanclass="menu">Disable user add-ons</span> will prevent using any add-ons (drivers, translators, etc.) you have installed in the user hierarchy under your Home folder.</p></li>
<li><p>If the offending driver, add-on etc. is installed in the system hierarchy, things get a bit more complicated, because that area is read-only. Here, the <spanclass="menu">Blacklist entries</span> comes into play. With it, you can navigate through the whole system hierarchy and disable the component that's messing things up for you by checking an entry with the <spanclass="key">SPACE</span> or <spanclass="key">RETURN</span> key. <spanclass="key">ESC</span> returns you up one level to the parent directory.</p>
<p>Online, there's the article <ahref="http://www.haiku-os.org/blog/barrett/2013-12-15_how_permanently_blacklist_package_file">How to Permanently Blacklist a Package File</a> showing how to make that setting stick.</p></li>
