Public bug reported:
Binary package hint: gnome-power-manager
When I use the brightness control keys from a fresh install, the brightness
jumps THREE increments.
By creating /etc/modprobe.d/video.conf and setting
options video brightness_switch_enabled = 0
I reduce this to consistently TWO brightness events, but this is still double
the normal events. If I kill gnome-power-manager, it returns to single
brightness events.
when hitting brightness up/down with gnome-power-manager, udevmonitor shows
UDEV - the event which udev sends out after rule processing
KERNEL - the kernel uevent
KERNEL[1267026969.897008] change /devices/virtual/backlight/acpi_video0
(backlight)
UDEV [1267026969.898270] change /devices/virtual/backlight/acpi_video0
(backlight)
KERNEL[1267026969.903078] change /devices/virtual/backlight/acpi_video0
(backlight)
UDEV [1267026969.903842] change /devices/virtual/backlight/acpi_video0
(backlight)
KERNEL[1267026971.355970] change /devices/virtual/backlight/acpi_video0
(backlight)
UDEV [1267026971.357418] change /devices/virtual/backlight/acpi_video0
(backlight)
with gnome-power-manager not running, it shows no events.
Description: Ubuntu lucid (development branch)
Release: 10.04
xserver-xorg-video-intel:
Installed: 2:2.9.1-1ubuntu1
Candidate: 2:2.9.1-1ubuntu1
Version table:
*** 2:2.9.1-1ubuntu1 0
500 http://archive.linux.duke.edu lucid/main Packages
100 /var/lib/dpkg/status
gnome-power-manager:
Installed: 2.29.1-0ubuntu2
Candidate: 2.29.1-0ubuntu2
Version table:
*** 2.29.1-0ubuntu2 0
500 http://archive.linux.duke.edu lucid/main Packages
100 /var/lib/dpkg/status
** Affects: gnome-power-manager (Ubuntu)
Importance: Undecided
Status: New
--
Brightness controls create triple brightness changes on Dell Mini 1012
https://bugs.launchpad.net/bugs/527157
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