Translations:Handbook:AMD64/Blocks/Booting/10/en


 * acpi=on
 * This loads support for ACPI and also causes the acpid daemon to be started by the CD on boot. This is only needed if the system requires ACPI to function properly. This is not required for Hyperthreading support.


 * acpi=off
 * Completely disables ACPI. This is useful on some older systems and is also a requirement for using APM. This will disable any Hyperthreading support of your processor.


 * console=X
 * This sets up serial console access for the CD. The first option is the device, usually ttyS0 on x86, followed by any connection options, which are comma separated. The default options are 9600,8,n,1.


 * dmraid=X
 * This allows for passing options to the device-mapper RAID subsystem. Options should be encapsulated in quotes.


 * doapm
 * This loads APM driver support. This also requires that.


 * dopcmcia
 * This loads support for PCMCIA and Cardbus hardware and also causes the pcmcia cardmgr to be started by the CD on boot. This is only required when booting from PCMCIA/Cardbus devices.


 * doscsi
 * This loads support for most SCSI controllers. This is also a requirement for booting most USB devices, as they use the SCSI subsystem of the kernel.


 * sda=stroke
 * This allows the user to partition the whole hard disk even when the BIOS is unable to handle large disks. This option is only used on machines with an older BIOS. Replace sda with the device that requires this option.


 * ide=nodma
 * This forces the disabling of DMA in the kernel and is required by some IDE chipsets and also by some CDROM drives. If the system is having trouble reading from the IDE CDROM, try this option. This also disables the default hdparm settings from being executed.


 * noapic
 * This disables the Advanced Programmable Interrupt Controller that is present on newer motherboards. It has been known to cause some problems on older hardware.


 * nodetect
 * This disables all of the autodetection done by the CD, including device autodetection and DHCP probing. This is useful for doing debugging of a failing CD or driver.


 * nodhcp
 * This disables DHCP probing on detected network cards. This is useful on networks with only static addresses.


 * nodmraid
 * Disables support for device-mapper RAID, such as that used for on-board IDE/SATA RAID controllers.


 * nofirewire
 * This disables the loading of Firewire modules. This should only be necessary if your Firewire hardware is causing a problem with booting the CD.


 * nogpm
 * This disables gpm console mouse support.


 * nohotplug
 * This disables the loading of the hotplug and coldplug init scripts at boot. This is useful for doing debugging of a failing CD or driver.


 * nokeymap
 * This disables the keymap selection used to select non-US keyboard layouts.


 * nolapic
 * This disables the local APIC on Uniprocessor kernels.


 * nosata
 * This disables the loading of Serial ATA modules. This is used if the system is having problems with the SATA subsystem.


 * nosmp
 * This disables SMP, or Symmetric Multiprocessing, on SMP-enabled kernels. This is useful for debugging SMP-related issues with certain drivers and motherboards.


 * nosound
 * This disables sound support and volume setting. This is useful for systems where sound support causes problems.


 * nousb
 * This disables the autoloading of USB modules. This is useful for debugging USB issues.


 * slowusb
 * This adds some extra pauses into the boot process for slow USB CDROMs, like in the IBM BladeCenter.