https://bugzilla.kernel.org/show_bug.cgi?id=68631

            Bug ID: 68631
           Summary: Asus Taichi31 - No second backlight (dark)
           Product: ACPI
           Version: 2.5
    Kernel Version: 3.13-rc7
          Hardware: x86-64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Power-Video
          Assignee: acpi_power-vi...@kernel-bugs.osdl.org
          Reporter: axel.hu...@web.de
        Regression: No

Hi,

I posted my problem already on the linux_acpi mailing list but maybe this is a
better place for it [1].

I am using a Asus Taichi31 with two screens (inside and outside on the lid).

The /sys/class/backlight only shows a acpi_video0 and intel_backlight section
one can manipulate for the "inner" display.

The problem is: the outer display is working but the backlight is unchangeable
set to off (besides that, one can very slightly see that it is indeed creating
a picture).

Do you have any suggestions how one could change that?

Thanks a lot!
Axel

[1] http://marc.info/?l=linux-acpi&m=138938058419187&w=2

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