@Eduardo and @J. Shaw - Sorry for the regression...
1. Does booting with the kernel parameter "acpi_backlight=vendor" fix it? (see the PPA instructions page) 2. Please post or email me the output from: $ ls /sys/class/backlight Thanks, -Kamal -- 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 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs