[Bug 498715] [NEW] segfault when changing brighness

[cyco]

Public bug reported:

Binary package hint: xfce4-power-manager

Bug description:

When I start my laptop usually the screen brightness is set to minimum. I have xfce4-power-manager running in e17. However trying to increase the screen brightness using the function keys fails. 
Running xfce4-power-manager --no-daemon in a terminal gives the following output:

(xfce4-power-manager:2106): xfce4-power-manager-WARNING **: could not
map keysym 1008ffa8 to keycode

and pressing one of the brightness function keys results in a segfault
. 
However after setting the brightness manually via: echo 7 >/sys/class/backlight/sony/brightness 
xfce4-power-manager works fine and setting the brightness works. 

Backtrace attached.

** Affects: xfce4-power-manager (Ubuntu)
     Importance: Undecided
         Status: New

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segfault when changing brighness
https://bugs.launchpad.net/bugs/498715
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