[Bug 902332] Re: Hotkeys for adjust the keyboard-backlight don't work on Samsung 700Z3A

[AdrianOlek]

In 11.10, the samsung-laptop module doesn't load, so controlling
backlight won't work just by mapping keycodes. If you follow the guide
from #7 comment you will have working kbd_backlight device in
/sys/devices/platform/samsung/leds/samsung::kbd_backlight/brightness.
However after you map kbdillumup / kbdillumdown keys, you still won't be
able to control backlight. There's some conflict when pressing
kbdillumup/down keys - keyboard input is broken after pressing. One
thing I've noticed is that if  you switch to terminal (ctrl+alt+f1)
after pressing the key, then switch back to desktop, keyboard input is
restored, the osd notification about keyboard backlight appears and
sometimes even keyboard brightness level changes (+/- 1 step). If
someone has an idea how to debug this situation (led device works
properly, keys are mapped in udev), please let me know.

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https://bugs.launchpad.net/bugs/902332

Title:
  Hotkeys for adjust the keyboard-backlight don't work on Samsung 700Z3A

Status in “udev” package in Ubuntu:
  Fix Committed

Bug description:
  What I expected to happen: using these shortcuts should change the
  keyboard backlight on Samsung 700Z3A (and possibly more models of this
  series).

  What happened instead: nothing.

  Keycodes are 0x97 and 0x96 so I think it should be something like
  this:

  0x97 keyboardbrightnessdown # Fn+F9
  0x96 keyboardbrightnessup # Fn+F10

  $ cat /sys/class/dmi/id/sys_vendor
  SAMSUNG ELECTRONICS CO., LTD.
  $ cat /sys/class/dmi/id/product_name
  700Z3A/700Z4A/700Z5A/700Z5B

  Ubuntu version is…
  Description:	Ubuntu 11.10
  Release:	11.10

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: udev 173-0ubuntu4
  ProcVersionSignature: Ubuntu 3.0.0-13.22-generic 3.0.6
  Uname: Linux 3.0.0-13-generic x86_64
  NonfreeKernelModules: wl fglrx
  ApportVersion: 1.23-0ubuntu4
  Architecture: amd64
  Date: Fri Dec  9 21:36:32 2011
  EcryptfsInUse: Yes
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
  MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z3A/700Z4A/700Z5A/700Z5B
  ProcEnviron:
   PATH=(custom, no user)
   LANG=de_DE.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-13-generic root=UUID=79cceb60-82a8-4f3e-ac45-da81d8a34455 ro quiet splash vt.handoff=7
  SourcePackage: udev
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 11/02/2011
  dmi.bios.vendor: Phoenix Technologies Ltd.
  dmi.bios.version: 09FD
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: 700Z3A/700Z4A/700Z5A/700Z5B
  dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD.
  dmi.board.version: FAB1
  dmi.chassis.asset.tag: Asset Tag
  dmi.chassis.type: 9
  dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD.
  dmi.chassis.version: 0.1
  dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvr09FD:bd11/02/2011:svnSAMSUNGELECTRONICSCO.,LTD.:pn700Z3A/700Z4A/700Z5A/700Z5B:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rn700Z3A/700Z4A/700Z5A/700Z5B:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1:
  dmi.product.name: 700Z3A/700Z4A/700Z5A/700Z5B
  dmi.product.version: 0.1
  dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD.

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