Acpi Compliant Embedded Controller Driver Download Lenovo Video !!EXCLUSIVE!!
Whatever you do, do NOT ever call thinkpad-acpi backlight-level changeinterface and the ACPI-based backlight level change interface(available on newer BIOSes, and driven by the Linux ACPI video driver)at the same time. The two will interact in bad ways, do funny things,and maybe reduce the life of the backlight lamps by needlessly kickingits level up and down at every change.
Acpi Compliant Embedded Controller Driver Download Lenovo Video