It looks like feature is implemented in systemd >= 209 and it stores screen backlight brightness for the whole system (not per user). The attached patch allows you to restore backlight for each user separately in gnome-settings-daemon 3.8.5 for Ubuntu 13.10.
** Patch added: "gsd_keep_backlight.patch" https://bugs.launchpad.net/ubuntu/+source/gnome-settings-daemon/+bug/896595/+attachment/3879615/+files/gsd_keep_backlight.patch -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-settings-daemon in Ubuntu. https://bugs.launchpad.net/bugs/896595 Title: Ubuntu does not remember LID brightness To manage notifications about this bug go to: https://bugs.launchpad.net/gnome-settings-daemon/+bug/896595/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs