Comment 305 for bug 1098216

Hi Perez,

I believe commit 5f24079b021cd3147c8d24ba65833f7a0df7e80d is meant to fix such problems:

commit 5f24079b021cd3147c8d24ba65833f7a0df7e80d
Author: Hans de Goede <email address hidden>
Date: Thu Aug 28 10:20:46 2014 +0200

    ACPI / video: Add a disable_native_backlight quirk

    Some laptops have a working acpi_video backlight control, and using native
    backlight on these causes a regression where backlight control does not work
    when userspace is not handling brightness key events. Disable native_backlight
    on these to fix this.

    Link: https://bugzilla.kernel.org/show_bug.cgi?id=81691
    Reported-and-tested-by: Andre Müller <email address hidden>
    Cc: 3.16+ <email address hidden> # 3.16+
    Signed-off-by: Hans de Goede <email address hidden>
    Signed-off-by: Rafael J. Wysocki <email address hidden>

Feel free to submit a patch to add your model into the video_dmi_table to disable native backlight control.