What does acpi=off and nolapic means?

kushalkoolwal · 03-03-2008, 05:58 PM

Hello,

Recently I started getting the dreaded "VFS: Kernel panic errors" on my VIA CX 700 board which has a SATA and a PATA controller. I found that I was able to get rid off those by giving the following kernel parameters:

Code:

acpi=off nolapic

Can anybody explain what does those mean? I read the Kernel-parameters.txt file in the Linux Kernel source Documentation but that was not much helpful.

Suppose if I want to explain somebody why I have to give those parameters for booting properly, how can I explain them?

Also what are the consequences of using these options? Am I giving up something by using them?

Edit: This happened once I performed a BIOS update

Thanks

Kushal

{BBI}Nexus{BBI} · 03-03-2008, 06:46 PM

By passing those parameters to the kernel you are in effect turning off those functions.

ACPI: http://en.wikipedia.org/wiki/Advance...ower_Interface

APIC: http://osdev.berlios.de/pic.html

kushalkoolwal · 03-03-2008, 07:06 PM

Quote:

Originally Posted by {BBI}Nexus{BBI}

By passing those parameters to the kernel you are in effect turning off those functions.

ACPI: http://en.wikipedia.org/wiki/Advance...ower_Interface

APIC: http://osdev.berlios.de/pic.html

Thanks for the link. I did found them when I gave a search on ACPI and APIC.

Actually I am not a hardware expert so sometimes the languages in those article is confusing.

Can anybody tell me what are the disadvantages of running your system with those two options? acpi=off nolapic.

Thank you once again.