[Bug 1169386] Re: [keymap] Toshiba satellite A660: backlight key does not work

[Mouhanad Alkallas]

I guess it does help to mention that the backlight for the keyboard is
directly linked to bios options. So if in windows I turn backlight on
than it will change to on in the bios, There is an option for "on" "off"
and "timer" in the BIOS. Timer is at default for 15 seconds, Toshiba
program allows you to modify that.

Martin Pitt, do you know if anybody is working on it? Or if there is
anything we can do?

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Title:
  [keymap] Toshiba satellite A660: backlight key does not work

Status in “systemd” package in Ubuntu:
  In Progress

Bug description:
  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.

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