<p>Haiku's Boot Loader Options 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). It's also handy if you have installed a software component that acts up and prevents you from booting Haiku, see <ahref="#troubleshooting">Troubleshooting</a> below.</p>
<p>Per entrare nelle opzioni del Boot Loader di Haiku bisogna premere il tasto <spanclass="key">SHIFT</span> prima dell'inizio del processo di avvio. Se è presente un boot manager, è possibile cominciare a premere il tasto <spanclass="key">SHIFT</span> prima di selezionare la voce di Haiku. Altrimenti se Haiku è l'unico sistema operativo installato nella macchina, è sufficiente premere il tasto appena compaiono i messaggi di avvio del BIOS.</p>
<divclass="box-info">On computers that use UEFI for booting instead of the classic BIOS, you need to use the <spanclass="key">SPACEBAR</span> instead.</div>
<tr><td><b>Select boot volume</b> (Seleziona il disco di avvio) </td><td></td><td>Choose which Haiku installation/state to start (see <ahref="#troubleshooting">Troubleshooting</a> below).</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><td></td><td></td><td>If <spanclass="menu">Enable debug syslog</span> is activated, a warm reboot after a crash shows these additional options:</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 so you can uninstall the offending package:</p>
<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 activating <spanclass="menu">Use fail-safe graphics driver</span> solves your troubles by falling back to VESA graphics, you can make the setting permanent by removing the <tt>#</tt> of the line <i>#fail_safe_video_mode true</i> in the text file <spanclass="path">/boot/home/config/settings/kernel/drivers/kernel</span>.</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>
<li><p>Under <spanclass="menu">Select boot volume</span> you can specify what former "version" of Haiku to boot. Every time you un/install a package, the old state is saved and you can boot into it by choosing it from the list presented in the boot loader options.<br/>
So, if you encounter boot problems after installing some package, boot a Haiku state from before that time and uninstall the offending package.</p></li>
<p>Dopo aver attivato una o più opzioni, è possibile tornare al menu principale e avviare normalmente il sistema che si presenterà con questa schermata di avvio:
<tr><td><b>Atomo</b></td><tdstyle="width:10px;"></td><td>Inizializza i moduli del kernel.</td></tr>
<tr><td><b>La lente di ingrandimento sul disco</b></td><td></td><td>Crea "rootfs" (<spanclass="path">/</span>) e monta "devfs" (<spanclass="path">/dev</span>).</td></tr>
<tr><td><b>Scheda elettronica</b></td><td></td><td> Inizializza il gestore delle periferiche.</td></tr>
<tr><td><b>Disco di avvio</b></td><td></td><td>Monta il disco di boot.</td></tr>
<tr><td><b>Il chip</b></td><td></td><td>Carica i moduli specifici della CPU.</td></tr>
<tr><td><b>La cartella</b></td><td></td><td>Finisce di inizializzare il sottosistema.</td></tr>
<tr><td><b>Il razzo</b></td><td></td><td>Launch_daemon has started the system.</td></tr>
