Comment 34 for bug 1000146

This issue in the kernel part could be fix by the following 2 commits, and they are in linux 3.6
I'll submit the ubuntu SRU later, but we still need the g-s-d patch in comment #32 to be merged.

commit 689db7843d503fae0eb46cb849e4caab35588170
Author: Corentin Chary <email address hidden>
Date: Mon Aug 20 23:01:50 2012 +0200

    drivers-platform-x86: remove useless #ifdef CONFIG_ACPI_VIDEO

    Signed-off-by: Corentin Chary <email address hidden>
    Signed-off-by: Matthew Garrett <email address hidden>

commit 272c77d55672ef92eda9d5e24a5a7ac62df9c431
Author: AceLan Kao <email address hidden>
Date: Wed Jun 13 09:32:06 2012 +0200

    asus-wmi: control backlight power through WMI, not ACPI

    BugLink: https://bugs.launchpad.net/bugs/1000146

    Some h/w that can adjust screen brightness through ACPI functions, but
    can't turn on/off the backlight power correctly. So, we list those h/w in
    quirks and try to turn on/off the backlight power through WMI.
    Signed-off-by: AceLan Kao <email address hidden>
    Signed-off-by: Corentin Chary <email address hidden>
    Signed-off-by: Matthew Garrett <email address hidden>