I'm running natty on a 13" macbook pro, and when I unplug the AC power sometimes, the monitor turns off. Sometimes I can unplug the AC adapter and nothing happens, but as soon as it starts happening ...
After installing Ubuntu on my ThinkPad T510, the GDM screen and GNOME session would always start at 100% brightness. I quickly found out, that this can be controlled via gnome-power-preferences, but ...
I'm using an IBM Thinkpad X21 as a 3G router. It's running a server install of lucid. The laptop has the lid up most of the time. There is no X, just a plain console. The colsole blanks itself, but ...