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

[Michael Shull]

I have a Toshiba Satellite A665 which has the same bug going back to
10.04. I ran through the keymapping steps mentioned above and have
identical results to Mouhanad. If there are any logs or testing I can do
to help solve this I'd be happy to help. There's a huge thread in the
Ubuntu Forums on this and a few users have found a workaround. By
booting into a windows partition/MiniXP from Hiren's Boot CD, and
toggling the backlight on, then rebooting into Ubuntu, the backlight
will work but BIOS is the only way to turn it off. Plus, you have to
repeat the process each time.

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to systemd in Ubuntu.
https://bugs.launchpad.net/bugs/1169386

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

Status in “systemd” package in Ubuntu:
  Incomplete

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.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1169386/+subscriptions