Same on my Acer Aspire 1810TZ running Kubuntu 11.04 (Natty).
Buttons are recognised and configured properly in system settings but screen
brightness can't be changed.
Also, every time the screen is dimmed to save power the screen brightness
reduces further
until it's completely dark.
--
You
As mentioned in my bug report I'm running Kubuntu Karmic 9.10. I'm
therefore not using gnome-power-manger and to be honest I'm also not
very motivated to install it with all its dependencies. @peddanet: Which
version of Ubuntu are you running? If yes, maybe you could provide the
required
