[Oneiric Beta users]: In Oneiric, the behavior "screen brightness keys toggle from max to min- brightness (no steps between)" in the Unity desktop is caused by bug 827517, which is now fixed in the gnome-settings-daemon package in the main Ubuntu archives -- but the fix didn't arrive until just after the Oneiric Beta 1 release. Simply updating your Oneiric system software after installing Beta 1 should pick up the fixed gnome-settings-daemon (version 3.1.90-0ubuntu2 or higher).
As noted previously, some Oneiric systems will still need to boot with "acpi_backlight=vendor" or some other vendor-specific boot parameter to make the brightness up/down keys work at all. See the PPA instructions page for details and additional diagnostic information (even though the PPA is no longer needed for Oneiric systems): https://launchpad.net/~kamalmostafa/+archive/linux-kamal-mjgbacklight [Natty and Maverick users]: No news to report. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/568611 Title: Screen brightness control fails on Dell Studio 1558 To manage notifications about this bug go to: https://bugs.launchpad.net/null/+bug/568611/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs