Public bug reported:
brightness setting used to work out of the box in Lucid
they stopped working in maverick (I believe)
they still do not work in natty
$ lsb_release -rd
Description: Ubuntu 11.04
Release: 11.04
Possibly related to acpi-support?
$ apt-cache policy acpi-support
acpi-support:
Installed: 0.138
Candidate: 0.138
Version table:
*** 0.138 0
500 http://be.archive.ubuntu.com/ubuntu/ natty/main i386 Packages
100 /var/lib/dpkg/status
What I expect (and used to work in lucid):
Brightness changes:
-when plugging/unplugging AC adapter
-when using Fn+F1/F2 key combinations
What happens: none of the above, brightness stays fixed.
Also the slider control in Power Management tray app (KDE) has no effect
What I can still do:
change brightness manually as :
echo 15 > /sys/class/backlight/panasonic/brightness
My laptop: Panasonic Toughbook CF-T5
Any hint is appreciated!
** Affects: ubuntu
Importance: Undecided
Status: New
** Tags: acpi acpi-support brightness panasonic screen
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https://bugs.launchpad.net/bugs/791458
Title:
screen brightness control (fn + F1/F2 keys, or KDE power management)
do not work any more in natty
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