Public bug reported:
Binary package hint: gnome-power-manager
In Hardy on a laptop with all updates to date, unplugging the AC and then
plugging it back in again, then repeating, eventually dims the LCD display
brightness to zero.
To reproduce:
* Install Hardy on a laptop
* Use AC power
* Select System, Preferences, Power Management, On Battery Power, Reduce
Backlight Brightness
* Using the laptop's built-in brightness controls (eg. Dell: FN-
Up/Down), ensure the brightness is on full (100%)
* Remove the AC power
* Wait 2-3 seconds
* Plug the AC power back in
* Wait 2-3 seconds
* Repeat plugging and unplugging the power three or four times
What is expected to happen:
* The backlight should switch between two constant states; 100% for AC,
dim for battery
What actually happens:
* The backlight gradually moves to dimmer and dimmer settings.
* Eventually, the backlight dims to lowest setting (0%) when on battery,
and half setting (50%) on AC
This happens for me on a Dell Inspiron 1520 with Intel i965 X3100
graphics, but on the ubuntu-uk mailing list there is a report of this
happening on an IBM / Lenovo Thinkpad too.
** Affects: gnome-power-manager (Ubuntu)
Importance: Undecided
Status: New
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Repeatedly switching from AC to battery dims LCD to zero
https://bugs.launchpad.net/bugs/218898
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