Public bug reported:
Binary package hint: gnome-power-manager
When gnome-power-manager isn't running the brightness level is stable. I
just can't change it using the keyboard shortcut. I can change the
brightness level using this command.
sudo echo 8 > /sys/devices/virtual/backlight/acpi_video0/brightness
I can also see the key event using xev when gnome-power-manager isn't
running.
when gnome-power-manager is running, the jitter will only start if I try to
change the brightness level.
This jitter can go on for hours, or sometime just minutes. (without killing
gnome-power-manager)
This happened on my MSI U120 laptop, my HPMini 110 doesn't require
gnome-power-manager to change the brightness (must be hardwired in the
system somehow) so I have no problem with that laptop.
ProblemType: Bug
Architecture: i386
Date: Tue Oct 20 01:54:24 2009
DistroRelease: Ubuntu 9.10
Package: gnome-power-manager 2.28.1-0ubuntu1
ProcEnviron:
PATH=(custom, user)
LANG=en_CA.UTF-8
SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-12.41-generic
SourcePackage: gnome-power-manager
Tags: ubuntu-unr
Uname: Linux 2.6.31-12-generic i686
** Affects: gnome-power-manager (Ubuntu)
Importance: Undecided
Status: New
** Tags: apport-bug i386 ubuntu-unr
--
Brightness jitter, look like the brightness key event are constantly calling
each other brightness-up, brightness-down ...
https://bugs.launchpad.net/bugs/456057
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