Good to know powersave daemon works. Then it is probably missing/buggy
implementation in HAL. powersave daemon uses own methods to control
PM/brightness, therefore it can work, while HAL/Guidance-Power-Manager
/GNOME-Power-Manager do not as they depend on proper implementation in
HAL.

You may want to search in HAL mailing lists if this was already
addressed recently (0.5.9 was just released, while feisty uses 0.5.8). I
do not know about log files...

** Changed in: hal (Ubuntu)
     Assignee: Luka Renko => (unassigned)

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cannot change screen brightness on Sony VAIO VGN-FS285M
https://bugs.launchpad.net/bugs/102294
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