Public bug reported:

After upgrading from 12.04 to 12.10, none of the hotkeys/media keys on
my keyboard are no longer functional. Specifically, the brightness
up/dn, volume up/dn/mute, keyboard backlight up/dn/off keys and the
media control keys (rew/play/ff) don't work perform the expected
functions.

I've confirmed that the underlying functionality works- for example I can 
adjust the keyboard backlight from the command line via:
`echo 0 > /sys/class/leds/smc\:\:kbd_backlight/brightness`

Machine is a MacbookPro 3,1 with an external Apple USB keyboard. Hotkeys
are non-functional on both the internal and external keyboards.

To reproduce:
1) Press the volume mute hotkey

Expected results:
Mute is toggled, and the indicator + OSD are displayed reflecting the new 
volume state

Actual results:
Nothing happens

xev (run from gnome terminal) reports the following when I press the
volume mute hotkey:

KeyPress event, serial 41, synthetic NO, window 0x4000001,
    root 0x15d, subw 0x0, time 6834066, (118,-23), root:(184,698),
    state 0x0, keycode 121 (keysym 0x1008ff12, XF86AudioMute), same_screen YES,
    XLookupString gives 0 bytes:
    XmbLookupString gives 0 bytes:
    XFilterEvent returns: False

KeyRelease event, serial 41, synthetic NO, window 0x4000001,
    root 0x15d, subw 0x0, time 6834162, (118,-23), root:(184,698),
    state 0x0, keycode 121 (keysym 0x1008ff12, XF86AudioMute), same_screen YES,
    XLookupString gives 0 bytes:
    XFilterEvent returns: False

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: gnome-settings-daemon 3.4.2-0ubuntu6
ProcVersionSignature: Ubuntu 3.5.0-8.8-generic 3.5.0
Uname: Linux 3.5.0-8-generic x86_64
ApportVersion: 2.4-0ubuntu6
Architecture: amd64
Date: Tue Aug  7 13:44:02 2012
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Beta amd64 (20100901.1)
ProcEnviron:
 TERM=xterm
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: gnome-settings-daemon
UpgradeStatus: Upgraded to quantal on 2012-08-07 (0 days ago)

** Affects: gnome-settings-daemon (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug quantal running-unity

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https://bugs.launchpad.net/bugs/1034090

Title:
  Hotkeys not functional after upgrade to quantal

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