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Starthanteraren

Haiku's starthanterare kan hjälpa när du har hårdvarurelaterade problem eller vill välja vilken Haikuinstallation du vill starta, om du har mer än en (kanske på en installations-CD eller ett USB-minne).
Det är också användbart efter att man installerat en mjukvarukomponent som krånglar och som hindrar dig från att starta systemet för att ta bort den igen. Valet Disable user add-ons som nämns nedan, startar Haiku utan att ladda komponenter installerade av användaren, t.ex. en drivrutin.

För att få fram valen i Boot Loader måste du tycka på, och fortsätta hålla ner tangenten SKIFT innan Haikus startprocess. Om du har en boot manager installerad kan du börja hålla ner SKIFT innan du väljer att starta Haiku. Om Haiku är det enda installerade operativsystemet på datorn kan du börja hålla ner tangenten när du fortfarande ser startmeddelanden från BIOS.

Boot Loader Options

När den kommit fram erbjuds du fyra menyer:

Select boot volume		Välj vilken Haikuinstallation du vill starta.
Select safe mode options		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.
		Safe mode Puts the system into safe mode. This can be enabled independently from the other options. Disable user add-ons Prevents all user installed add-ons from being loaded. Only the add-ons in the system directory will be used. See Troubleshooting below. Disable IDE DMA Disables IDE DMA, increasing IDE compatibility at the expense of performance. Ignore memory beyond 4 GiB Ignores all memory beyond the 4 GiB address limit, overriding the setting in the kernel settings file. Use fail-safe video mode The system will use VESA mode and won't try to use any video graphics drivers. Disable IO-APIC Disables using the IO APIC for interrupt routing, forcing the use of the legacy PIC instead. Disable local APIC Disables using the local APIC, also disables SMP. Disable SMP Disables all but one CPU core. Don't call the BIOS Stops the system from calling BIOS functions. Disable APM Disables Advanced Power Management hardware support, overriding the APM setting in the kernel settings file. Disable ACPI Disables Advanced Configuration and Power Interface hardware support, overriding the ACPI setting in the kernel settings file. Blacklist entries Allows to select system files that shall be ignored. Useful e.g. to disable drivers temporarily. See Troubleshooting below.
Select debug options		Here you'll find several options that help with debugging or getting details for a bug report. Again, a short explanation for each option is displayed at the bottom.
		Enable serial debug output Turns on forwarding the syslog output to the serial interface (default: 115200, 8N1). Enable on screen debug output Display debug output on screen while the system is booting, instead of the normal boot logo. Disable on screen paging Disables paging when on screen debug output is enabled. Enable debug syslog Enables a special in-memory syslog buffer for this session that the boot loader will be able to access after rebooting. Display current boot loader log Displays the debug info the boot loader has logged (press Q to exit the log) Add advanced debug option Allows advanced debugging options to be entered directly.
		If "Enable debug syslog" is activated, a warm reboot after a crash shows these additional options:
		Save syslog from previous session during boot Saves the syslog from the previous Haiku session to /var/log/previous_syslog when booting. Display syslog from previous session Displays the syslog from the previous Haiku session Save syslog from previous session Saves the syslog from the previous Haiku session to disk. Currently only FAT32 volumes are supported.
Select fail safe video mode		Om du behövde aktivera valet Use fail-safe video mode kan du ange upplösning och färgdjup.

Troubleshooting

If Haiku refuses to boot on your hardware from the get-go, try out setting different options under Select safe mode options. Consider filing a bug report in any case.

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:

Activating Safe mode will prevent most servers, daemons and the UserBootScript from being started.
Activating Disable user add-ons will prevent using any add-ons (drivers, translators, etc.) you have installed in the user hierarchy under your Home folder.
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 Blacklist entries 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 SPACE or RETURN key. ESC returns you up one level to the parent directory.

Online, there's the article How to Permanently Blacklist a Package File showing how to make that setting stick.

Booting Haiku

Efter att du aktiverat ett eller flera val återvänder du till huvudmenyn och fortsätter med startprocessen som visar dig denna skärm:

Om allt är OK tänds symbolerna snabbt, en efter en.
De olika symbolerna motsvarar ungefärligt dessa i steg startsprocessen:

Atom		Initierar moduler.
Hårddisk + förstoringsglas		Skapar rootfs (/) och monterar devfs (/dev).
Kretskort		Initierar enhetshanteraren.
Startdisk		Monterar startdisk.
Chip		Laddar CPU-specifika moduler.
Mapp		Slutgiltig initiering av delsystem.
Raket		Startskript startar systemet.