<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>A rendszertöltőbe való belépéshez tartsuk lenyomva a <spanclass="key">SHIFT</span> billentyűt, mielőtt a Haiku betöltési folyamat elindul (mielőtt megjelenik a Haiku logó). Ha rendszerválasztó menü is van telepítve, akkor tartsuk lenyomva a <spanclass="key">SHIFT</span>-et mielőtt kiválasztjuk az indítandó rendszert. Ha csak Haiku van a gépünkön, akkor ajánlott már akkor lenyomva tartani a billentyűt, amikor még a BIOS üzenetei vannak a képernyőn.</p>
<tr><td><b>Select boot volume</b><br/>Rendszer kiválasztása</td><td></td><td>Choose which Haiku installation/state to start (see <ahref="#troubleshooting">Troubleshooting</a> below).</td></tr>
</td><td></td><td>A következő opciók hibakereséskor lehetnek hasznunkra. Az opciók kijelölésekor a képernyő alján egy rövid leírást olvashatunk a hatásukról.</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>
Allows advanced debugging options to be entered directly.</p></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>
<tr><td></td><td></td><td><p><spanclass="menu">Save syslog from previous session during boot</span><br/>
Saves the syslog from the previous Haiku session to <spanclass="path">/var/log/previous_syslog</span> when booting.</p>
<p><spanclass="menu">Display syslog from previous session</span><br/>
Displays the syslog from the previous Haiku session.</p>
<p><spanclass="menu">Save syslog from previous session</span><br/>
Saves the syslog from the previous Haiku session to disk. Currently only FAT32 volumes are supported.</p></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">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>
<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>
