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Linux Boot Options

This list contains many of the most common boot options for GRUB. When presented with the text on the screen "boot:" then the boot options below can be given. They must have the kernel name before the option.

Example

Adding the vga=771 option:

boot: /boot/vmlinuz-2.6.15-26-k7 root=/dev/hda1 ro quiet splash

boot: /boot/vmlinuz-2.6.15-26-k7 root=/dev/hda1 ro quiet splash vga=771

Options can be used together such as in this example:

/boot/vmlinuz-2.6.15-26-k7 root=/dev/hda1 ro quiet splash noapic nolapic

Kernel Options

Note: These options are used by the kernel, and will apply to any installation at any time. The file "Documentation/kernel-parameters.txt" in the relevant linux-source package provides more information.

Option

Impact

vga=xxx

Set your framebuffer resolution to VESA mode xxx. Check here for a list of possible modes.

acpi=off OR noacpi

This parameter disables the whole ACPI system. This may prove very useful, for example, if your computer does not support ACPI or if you think the ACPI implementation might cause some problems (for instance random reboots or system lockups).

acpi=force

Activates the ACPI system even if your computer BIOS date is older than 2000. This parameter overwrites acpi=off and can also be used with current hardware if the ACPI support is not activated despite apm=off.

pci=noacpi OR acpi=noirq

These parameters disable the PCI IRQ routing

pci=acpi

This parameter activates the PCI IRQ routing

acpi_irq_balance

ACPI is allowed to use PIC interrupts to minimize the common use of IRQs.

acpi_irq_nobalance

ACPI is not allowed to use PIC interrupts.

acpi=oldboot

Deactivates the ACPI system almost completely; only the components required for the boot process will be used.

acpi=ht

Impact Deactivates the ACPI system almost completely; only the components required for hyper threading will be used.

noapic

Disable the "Advanced Programmable Interrupt Controller (APIC)".

nolapic

Disable the "local APIC".

apm=off OR noapm

Disable the Advanced Power Management.

irqpoll

Changes the way the kernel handles interrupt calls (set it to polling). Can be useful in case of hardware interrupt issues.

xforcevesa

Force X to start using VESA driver. Usefull for some notebooks with uncommon video interfaces.


This page last modified on 2 December 2008 08:07:51 PM (active 607 days)

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All content herein copyright ©2008 by Ben Armacost.