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[Martin Pitt <martin.pitt@xxxxxxxxxx>]

Thanks. Your attached udev.txt confirms that the keymap matching worked:

P: /devices/platform/i8042/serio0/input/input4/event4
[...]
E: KEYBOARD_KEY_85=brightnessdown
E: KEYBOARD_KEY_86=brightnessup
[...]

and your evdev output on event10 confirms that the device *claims* to
support KEY_BRIGHTNESS{UP,DOWN}.

If you don't get any events on either device, this must be fixed in the
kernel keyboard driver, reassigning to linux. Any chance you could try
to install/boot the raring kernel on current saucy, to check if that
brings back the keys?

** Package changed: systemd (Ubuntu) => linux (Ubuntu)

** Changed in: linux (Ubuntu)
       Status: Incomplete => New

** Summary changed:

- [keymap] display brightness keys stop working after saucy upgrade
+ display brightness keys don't generate evdev events after saucy upgrade

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https://bugs.launchpad.net/bugs/1229591

Title:
  display brightness keys don't generate evdev events after saucy
  upgrade

Status in “linux” package in Ubuntu:
  New

Bug description:
  On raring (and precise) the display brightness keys (fn+f4 and fn+f5)
  on my Dell Inspiron 14z turned the brightness up and down.  After a
  saucy upgrade this no longer happens (I don't see the popup brightness
  bubble either).  The other, similar keys (volume adjustment, etc)
  still work fine.

  Changing the values in /sys/class/backlight/intel_backlight/brightness
  works (temporarily - it gets reset after the screen lock kicks in)

  I tried following the instructions in
  https://wiki.ubuntu.com/Hotkeys/Troubleshooting but this appears to be
  out of date (it references /usr/share/doc/udev/README.keymap.txt which
  does not exist)

  $ lsb_release -rd
  Description:	Ubuntu Saucy Salamander (development branch)
  Release:	13.10

  $ apt-cache policy udev
  udev:
    Installed: 204-0ubuntu12
    Candidate: 204-0ubuntu12
    Version table:
   *** 204-0ubuntu12 0
          500 http://gb.archive.ubuntu.com/ubuntu/ saucy/main amd64 Packages
          100 /var/lib/dpkg/status

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