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[madbiologist <399587@xxxxxxxxxxxxxxxxxx>]

This might be fixed in the upcoming upstream 3.20 kernel - see
http://lkml.iu.edu/hypermail/linux/kernel/1502.2/02418.html

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https://bugs.launchpad.net/bugs/399587

Title:
  Brightness control does not work with Toshiba Portege M100

Status in upower package in Ubuntu:
  Confirmed

Bug description:
  Binary package hint: acpi-support

  Hi!

  I tried to adjust the brightness on my Toshiba Portege M100 by
  pressing Fn + F6/F7. Unfortunately nothing happened.

  "toshiba_acpi" is loaded and "acpi_listen" gives me the following on
  pressing Fn + F6/F7:

  #  acpi_listen
  hkey VALD 00000000 00000140
  hkey VALD 00000001 00000140
  hkey VALD 00000000 00000141
  hkey VALD 00000001 00000141

  Running "acpid -d" gives me the following output by pressing Fn +
  F6/F7:

  # acpid -d
  acpid: received event "hkey VALD 00000000 00000140"
  acpid: rule from 4077[0:0] matched
  acpid: notifying client 4077[0:0]
  acpid: rule from 4021[105:106] matched
  acpid: notifying client 4021[105:106]
  acpid: 2 total rules matched
  acpid: completed event "hkey VALD 00000000 00000140"
  acpid: received event "hkey VALD 00000001 00000140"
  acpid: rule from 4077[0:0] matched
  acpid: notifying client 4077[0:0]
  acpid: rule from 4021[105:106] matched
  acpid: notifying client 4021[105:106]
  acpid: rule from /etc/acpi/events/tosh-video_brightnessdown matched
  acpid: executing action "/etc/acpi/video_brightnessdown.sh"
  BEGIN HANDLER MESSAGES
  END HANDLER MESSAGES
  acpid: action exited with status 0
  acpid: 3 total rules matched
  acpid: completed event "hkey VALD 00000001 00000140"
  acpid: received event "hkey VALD 00000000 00000141"
  acpid: rule from 4077[0:0] matched
  acpid: notifying client 4077[0:0]
  acpid: rule from 4021[105:106] matched
  acpid: notifying client 4021[105:106]
  acpid: 2 total rules matched
  acpid: completed event "hkey VALD 00000000 00000141"
  acpid: received event "hkey VALD 00000001 00000141"
  acpid: rule from 4077[0:0] matched
  acpid: notifying client 4077[0:0]
  acpid: rule from 4021[105:106] matched
  acpid: notifying client 4021[105:106]
  acpid: 2 total rules matched
  acpid: completed event "hkey VALD 00000001 00000141"

  So my first guess was to add the keycode in "/etc/acpi/events" but my
  first dry run with:

  # /etc/acpi/video_brightnessdown.sh

  or

  # /etc/acpi/video_brightnessup.sh

  had no effect.

  Btw: changing the brightness with something like:

  % echo 'brightness: 1' > /proc/acpi/toshiba/lcd

  works but "Power Management Brightness Applet" does not get notified
  by that change. In contrast changing the brightness with the applet is
  very coarse. Instead of 8 brightness-levels it is only able to set
  three levels (0, 3 and 7).

  Nevertheless the main goal is to get the function keys running. Any
  clues?

  # uname -a
  Linux antares 2.6.28-13-generic #45-Ubuntu SMP Tue Jun 30 19:49:51 UTC 2009 i686 GNU/Linux

  # lsb_release -rd
  Description:    Ubuntu 9.04
  Release:        9.04

  # apt-cache policy acpi-support
  acpi-support:
    Installed: 0.121
    Candidate: 0.121
    Version table:
   *** 0.121 0
          500 http://at.archive.ubuntu.com jaunty/main Packages
          100 /var/lib/dpkg/status

  Thank you for maintaining!

  Greetings,
   - Darsha

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