I have Ubuntu 8.10 installed on a Sony Vaio VGN-FW11ZU laptop.
It is not possible to adjust the brightness using the function keys <Fn><-> 
(dim) or <Fn><+> (brighten).
(or by using the Gnome Power Manager Brightness Applet 2.24.0)

Using the instructions at https://wiki.ubuntu.com/DebuggingHal :-
After clean reboot I entered the following into a terminal:-
 $sudo /etc/init.d/hal stop
 $sudo hald --verbose=yes --daemon=no 2>&1 | tee /tmp/hal.log
I waited for output to settle and pressed the Fn Key and simultaneously the 
screen dim button (F5) three times.
I entered the following in another terminal and then closed it:-
 $lshal > /tmp/lshal.txt
In the first terminal I pressed CTRL-C to send an INT signal to kill the 
foreground hald process.
Then I entered the following to start hal normally:-
 $sudo /etc/init.d/hal start
Attached is hal_logs.zip.gz which contains:- hal.log, kern.log, lshal.txt.

I am willing to try and create a patch.
Any tips would be welcome.


** Attachment added: "hal_logs.zip.gz"
   http://launchpadlibrarian.net/23054506/hal_logs.zip.gz

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can't adjust brightness on sony vaio fe890
https://bugs.launchpad.net/bugs/266996
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