Comment 5 for bug 223954

As bgcommon notes, the bug is easily triggered. Set your brightness to a certain level with the Brightness Applet. Alter the brightness with the [Fn + Up] or [Fn + Down] key. Close/reopen the laptop lid and the level will revert to that which had originally been set in the Brightness Applet.

As you requested, here are the results of the commands. The commands were executed after setting the brightness with the Brightness Applet but before using the [Fn + *] key:

gconftool -a /apps/gnome-power-manager/backlight
--------------------
 idle_dim_battery = true
 idle_brightness = 30
 dpms_method_battery = default
 dpms_method_ac = default
 idle_dim_time = 30
 brightness_battery = 70
 enable = true
 idle_dim_ac = false
 brightness_ac = 81
 battery_reduce = true

gnome-power-bugreport.sh
--------------------
Distro version: DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=8.04
DISTRIB_CODENAME=hardy
DISTRIB_DESCRIPTION="Ubuntu 8.04"
Kernel version: 2.6.24-19-generic
g-p-m version: 2.22.1
HAL version: 0.5.11rc2
System manufacturer: missing
System version: missing
System product: missing
AC adapter present: yes
Battery present: yes
Laptop panel present: yes
CPU scaling present: yes
Battery Information:
  battery.charge_level.current = 50116 (0xc3c4) (int)
  battery.charge_level.design = 53280 (0xd020) (int)
  battery.charge_level.last_full = 50116 (0xc3c4) (int)
  battery.charge_level.percentage = 100 (0x64) (int)
  battery.charge_level.rate = 11 (0xb) (int)
  battery.is_rechargeable = true (bool)
  battery.model = ' DELLUD2657' (string)
  battery.present = true (bool)
  battery.rechargeable.is_charging = false (bool)
  battery.rechargeable.is_discharging = false (bool)
  battery.reporting.current = 4800 (0x12c0) (int)
  battery.reporting.design = 4800 (0x12c0) (int)
  battery.reporting.last_full = 4515 (0x11a3) (int)
  battery.reporting.rate = 1 (0x1) (int)
  battery.reporting.technology = 'Li-ion' (string)
  battery.reporting.unit = 'mAh' (string)
  battery.technology = 'lithium-ion' (string)
  battery.type = 'primary' (string)
  battery.vendor = 'SMP' (string)
  battery.voltage.current = 12424 (0x3088) (int)
  battery.voltage.design = 11100 (0x2b5c) (int)
  battery.voltage.unit = 'mV' (string)
GNOME Power Manager Process Information:
john 7017 0.0 1.1 247184 11636 ? Ss 14:16 0:00 gnome-power-manager
john 7109 0.0 1.0 225616 10816 ? S 14:17 0:00 /usr/lib/gnome-power-manager/gnome-brightness-applet --oaf-activate-iid=OAFIID:GNOME_BrightnessApplet_Factory --oaf-ior-fd=36
HAL Process Information:
107 5669 0.0 0.4 40208 4828 ? Ss 14:13 0:03 /usr/sbin/hald
root 5735 0.0 0.1 22048 1316 ? S 14:13 0:00 \_ hald-runner
root 5748 0.0 0.2 34628 2404 ? S 14:13 0:00 \_ /usr/lib/hal/hald-addon-dell-backlight
root 5749 0.0 0.1 24156 1296 ? S 14:13 0:00 \_ hald-addon-input: Listening on /dev/input/event8 /dev/input/event10 /dev/input/event9 /dev/input/event1 /dev/input/event4 /dev/input/event5 /dev/input/event6
root 5759 0.0 0.1 24168 1324 ? S 14:13 0:00 \_ /usr/lib/hal/hald-addon-cpufreq
107 5760 0.0 0.1 16672 1044 ? S 14:13 0:00 \_ hald-addon-acpi: listening on acpid socket /var/run/acpid.socket
root 5783 0.0 0.1 24156 1280 ? S 14:13 0:00 \_ hald-addon-storage: polling /dev/scd0 (every 2 sec)