I think it has something to do with hal, as even kpowersave can't change
the brightness.
Using the FN-keys to change the brightness works, but being able to
change it by software can help saving power when running on batteries.
** Also affects: hal (Ubuntu)
Importance: Undecided
Status: New
** Also affects: kpowersave (Ubuntu)
Importance: Undecided
Status: New
** Also affects: linux-meta (Ubuntu)
Importance: Undecided
Status: New
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Cannot control brightness / backlight of Dell notebook
https://bugs.launchpad.net/bugs/198071
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