Public bug reported:
Binary package hint: gnome-power-manager
Since I installed Intrepid, adjusting the LCD brightness is always an annoying
experience on my Acer 5720, both on AC power and on battery power.
If I increase or decrease the brightness by one step with the Fn+left/Fn+right
one of the following will randomly happen:
- changing the brightness (as expected);
- resetting the brightness to the minimum;
- the brightness rapidly goes to the minimum, then to the desired amount. This
may happen up to 2-3 times in a row, leading to an annoying short flicker.
With the +/- buttons from the Brightness applet, the brightness seems to
go to the minimum, then goes back, then to the minimum again, then to
the new value. During these operations (which last about half a second),
the applet is unresponsive, i.e. the slider changes its position only
after it finished.
Trying to drag the slider to the desired value, it behaves like I was
pressing the +/- buttons many times, therefore the brightness flickers
and slowly changes for some seconds. Sometimes it directly reaches the
final value, sometimes it goes back for a certain amount then goes to
the final values, sometimes it stops in the middle. All of this is VERY
annoying.
Moreover, I see some flicker happening some time after I don't move the
mouse or press any key (always returning to the current brightness)
and/or when I start again to use keyboard or the mouse.
I repeat: before using Ubuntu 9.04, everything worked almost fine.
The cause may be a conflict between gnome-power-manager and some other
piece of software (kernel? brightness applet?), therefore I'm filing
this to the g-p-m package.
ProblemType: Bug
ACAdapter: Present
Architecture: i386
Battery: Present
CPUScaling: Present
DistroRelease: Ubuntu 9.04
LaptopPanel: Present
Package: gnome-power-manager 2.24.2-2ubuntu8
ProcEnviron:
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: gnome-power-manager
Uname: Linux 2.6.28-11-generic i686
** Affects: gnome-power-manager (Ubuntu)
Importance: Undecided
Status: New
** Tags: apport-bug i386
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LCD backlight flickers when adjusting it and when the system is idle
https://bugs.launchpad.net/bugs/382167
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