Comment 2 for bug 337370

I can confirm this bug but could not confirm the workaround. The only workaround that worked for me is to set the backlight control in the bios to "user control" instead the default, because then the brightness is not reduced on battery.

But if i reduce the backlight brightness before booting jaunty (e.g. in bios or in grub with the brightness keys), jaunty will consider this reduced brightness as maximum again.

In Karmic no brightness control works with the nc10.