This is the issue in hal package as the following script uses /bin/sh, but should use /bin/bash instead:
/usr/share/hal/scripts/hal-system-lcd-get-brightness I think thic could be considred for edgy-updates as it is regression and simple, obvious fix. ** Changed in: gnome-power-manager (Ubuntu) Sourcepackagename: gnome-power-manager => hal Importance: Undecided => Medium Status: Unconfirmed => Confirmed Target: None => edgy-updates -- [Edgy] PowerManager has no more effect on brightness https://launchpad.net/bugs/68617 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs