[Bug 546201] [NEW] [LUCID Beta 1] Brightness Fn keys don't work as expected on Sony Vaio VGN FW35G. Regression.

[svaens]

Public bug reported:

Dear dev,

This bug report is related to running Ubuntu Lucid Beta 1 on my Sony
Vaio VGN-FW35G, Graphics ATI Radeon Mobility HD 3470

Summary:
------------

Problem: Brightness control key combination of (Fn+f5, Fn+f6) do not work as expected. However, Fn key is recognized.
Regression from Karmic where brightness worked.

More info:
------------

In lucid, so far, as of Lucid Beta 1 (updated fully on 24th of March)
the 'make brighter' and 'make less bright' key combinations (Fn+f5,
Fn+f6)  don't seem to work correctly.

In both cases I see the notification box pop up, but in the case of
'make less bright' it just shows. Since my brightness is on FULL
already, 'make brighter' makes that 'hit the end' bump kind of look on
the notification. I'm not sure if it would work at all if my brightness
was not on full already.

Make less bright just shows notification .. but no change in brightness
on screen, and no change in reported brightness in notification window.

Additional info:
---------------------

A suggestion from a fellow Ubuntu forum visitor pointed me to the old
posting:

http://ubuntuforums.org/showthread.php?t=465491

I figure that information that he requested back then might be relevant
and useful for this bug report. So I attach it here also.

So, the run of the script gives the following output: (and attached
file)

sean at svUbuntuX2:~/Desktop/downloads/vaio_script$ sudo bash ./snc-dsdt.download
[sudo] password for sean:
Checking and installing tools...
Reading package lists... Done
Building dependency tree
Reading state information... Done
dmidecode is already the newest version.
The following NEW packages will be installed:
  acpidump
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 14.8kB of archives.
After this operation, 94.2kB of additional disk space will be used.
Get:1 http://ftp.iinet.net.au karmic/universe acpidump 20071116-1 [14.8kB]
Fetched 14.8kB in 0s (25.6kB/s)
Selecting previously deselected package acpidump.
(Reading database ... 143864 files and directories currently installed.)
Unpacking acpidump (from .../acpidump_20071116-1_i386.deb) ...
Processing triggers for man-db ...
Setting up acpidump (20071116-1) ...

Getting model information: Model: VGN-FW35G_B, BIOS: R2050Y0
Dumping the ACPI Differentiated System Description Table (DSDT)
Packing and compressing the DSDT...
All done, thank-you

If you want, you can now remove the acpidump and dmidecode packages using:
 sudo apt-get remove acpidump dmidecode

Please attach the file /tmp/VGN-FW35G_B-R2050Y0.dsdt.tar.gz to a new
post in this Ubuntu forums thread:

http://ubuntuforums.org/showthread.php?t=465491

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

-- 
[LUCID Beta 1] Brightness Fn keys don't work as expected on Sony Vaio VGN FW35G. Regression.
https://bugs.launchpad.net/bugs/546201
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