Public bug reported:

Some hotkeys are not working on my HP 2230s (Presentation, Mute, Lock
key (Fn+F6))

$ sudo uname -r
2.6.30-020630rc3-generic

$ sudo lsb_release -d
Description:    Ubuntu 9.04

$ sudo apt-cache policy hotkey-setup
hotkey-setup:
  Installerad: 0.1-23ubuntu12
  Kandidat: 0.1-23ubuntu12
  Versionstabell:
 *** 0.1-23ubuntu12 0
        500 http://se.archive.ubuntu.com jaunty/main Packages
        100 /var/lib/dpkg/status

$ sudo dmidecode -s system-manufacturer
Hewlett-Packard
$ sudo dmidecode -s system-product-name
HP 2230s 
$ sudo dmidecode -s system-version
F.07

Presentation button
----------------------------
$ sudo input-events 4

/dev/input/event4
   bustype : BUS_I8042
   vendor  : 0x1
   product : 0x1
   version : 43841
   name    : "AT Translated Set 2 keyboard"
   phys    : "isa0060/serio0/input0"
   bits ev : EV_SYN EV_KEY EV_MSC EV_LED EV_REP

waiting for events
21:35:19.556586: EV_MSC code=4 value=28
21:35:19.556611: EV_KEY KEY_ENTER (0x1c) released
** Presentation button pressed **
21:35:19.556615: EV_SYN code=0 value=0
21:35:23.207028: EV_MSC code=4 value=136
21:35:23.207081: EV_SYN code=0 value=0
21:35:23.213884: EV_MSC code=4 value=136
21:35:23.213931: EV_SYN code=0 value=0

$ dmesg
...
[ 8596.894816] atkbd.c: Unknown key pressed (translated set 2, code 0x88 on 
isa0060/serio0).
[ 8596.894825] atkbd.c: Use 'setkeycodes e008 <keycode>' to make it known.
[ 8596.901953] atkbd.c: Unknown key released (translated set 2, code 0x88 on 
isa0060/serio0).
[ 8596.901963] atkbd.c: Use 'setkeycodes e008 <keycode>' to make it known.
...

Fn+F6 (Lock key)
----------------------------
$ sudo input-events 4

/dev/input/event4
   bustype : BUS_I8042
   vendor  : 0x1
   product : 0x1
   version : 43841
   name    : "AT Translated Set 2 keyboard"
   phys    : "isa0060/serio0/input0"
   bits ev : EV_SYN EV_KEY EV_MSC EV_LED EV_REP

waiting for events
21:32:24.202804: EV_MSC code=4 value=28
21:32:24.202837: EV_KEY KEY_ENTER (0x1c) released
** Lock button pressed **
21:32:24.202843: EV_SYN code=0 value=0
21:32:26.465681: EV_MSC code=4 value=64

Mute button
----------------------------
$ sudo input-events 4

/dev/input/event4
   bustype : BUS_I8042
   vendor  : 0x1
   product : 0x1
   version : 43841
   name    : "AT Translated Set 2 keyboard"
   phys    : "isa0060/serio0/input0"
   bits ev : EV_SYN EV_KEY EV_MSC EV_LED EV_REP

waiting for events
21:36:30.481921: EV_MSC code=4 value=28
21:36:30.481950: EV_KEY KEY_ENTER (0x1c) released
21:36:30.481955: EV_SYN code=0 value=0
** Mute button pressed **
timeout, quitting

** Affects: ubuntu
     Importance: Undecided
         Status: New

-- 
Hotkeys not working on HP 2230s
https://bugs.launchpad.net/bugs/369484
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