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Toshiba satellite A660 backlight just never worked on ubuntu.

Here is an outline of some of the LEDS in a toshiba

http://i.imgur.com/l54s5CP.jpg

When i press Fn+Z the ubuntu keyboard LED notification shows up, however
nothing changes.

so i navigated to

/sys/devices/pci0000:00/0000:00:1c.4/0000:16:00.0/firmware_node/subsystem/devices/TOS1900:00/leds/toshiba::illumination/device/leds/toshiba::illumination

found files

brightness device max_brightness power subsystem trigger uevent

when i changed the value in brightness from 0 to 1

LED 1, 2, and 3 in the above picture turns on, and led 1 turns off when
touch bad is off.

However there is no keyboard backlight.upon boot the backboard backlight
works while posting and shutdown when grub loads. When i disable acpi
the keyboard backlight works however ill lose other functionalities like
brightness.

Any way to fix it?

There is also another directory.

/sys/devices/pci0000:00/0000:00:1c.4/0000:16:00.0/firmware_node/subsystem/devices/TOS1900:00/leds/toshiba::illumination/device/leds/toshiba::illumination/subsystem/mmc0::

with files brightness device max_brightness power subsystem trigger uevent
nothing happens when brightness value changes.


LSB Version:	core-2.0-amd64:core-2.0-noarch:core-3.0-amd64:core-3.0-noarch:core-3.1-amd64:core-3.1-noarch:core-3.2-amd64:core-3.2-noarch:core-4.0-amd64:core-4.0-noarch
Distributor ID:	Ubuntu
Description:	Ubuntu Raring Ringtail (development branch)
Release:	13.04
Codename:	raring
Linux mouhanad-Satellite-A660 3.8.0-18-generic #28-Ubuntu SMP Thu Apr 11 19:38:55 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

#Problem also exists in older version of ubuntu, new kernel in 13.04
does not solve the problems.

 xev shows a key being pressed and being mapped to kbdbacklight. A a
notification that keyboard is being turned on appears when Fn+Z is
pressed. Also unlike other manufactures toshiba doesn't have brightness
on backlit keyboards, its either on or off or a timer.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: bot-comment keymap raring
-- 
[keymap] Toshiba satellite A660: backlight key does not work
https://bugs.launchpad.net/bugs/1169386
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