naveen, you need to manually set the boot parameter 'acpi_backlight=vendor' if you use grub as your boot manager, edit /boot/grub/grub.cfg and add the parameter to the end of the appropriate line that begins with 'linux'.
be sure to do this whenever you get kernel updates too. -- 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/ubuntu/+source/alsa-driver/+bug/568611/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
