Comment 4 for bug 806434

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Massimo Forti (slackwarelife) wrote :

Hi, by passing ACPI = OFF 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

But this option can help you to install Ubuntu. These are the steps:

http://stephen.rees-carter.net/2011/07/installing-ubuntu-11-04-on-a-thinkpad-l520/

let me know, thanks.