Same bug here.

Ubuntu Maverick 10.10 2.6.35-22-generic
Sony Vaio F13Z with GeForce GT 425M

a) 
$ killall gnome-settings-daemon gnome-power-manager
$ xev | sed -n 's/^.*state \([0-9].*\), keycode *\([0-9]\+\) *\(.*\), 
.*$/keycode \2 = \3, state = \1/p'

The brightness keys are NOT recognized. The sound keys are recognized.

b)
$ acpi_listen

The brightness keys ARE REPORTING events, but nothing happens.

(brightness--)
sony/hotkey SNC 00000001 00000010
sony/hotkey SNC 00000001 0000003b
(brightness++)
sony/hotkey SNC 00000001 00000011
sony/hotkey SNC 00000001 0000003b

Is this a kernel bug, not transmitting the events?

The attachment contains:

udevadm info --export-db > udev-db.txt
dmesg > dmesg.log
xkbcomp -xkb :0 - > xkbcomp.txt
setxkbmap -print > xkbmap.txt
tar cvzf output.txt.tgz *


** Attachment added: "log messages"
   
https://bugs.launchpad.net/ubuntu/+source/udev/+bug/498706/+attachment/1732054/+files/output.txt.tgz

-- 
Sony vaio brightness key doesn't work
https://bugs.launchpad.net/bugs/498706
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