Oddly, I've never experienced this issue until doing an update today. My system is a Dell XPS 13 and my kernel version is also 3.8.0-22.
Running the following command restores brightness controls for me, until returning from standby or booting. sudo echo 0 > /sys/class/backlight/intel_backlight/brightness -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/954661 Title: backlight brightness not adjustable by default on Dell XPS 13 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/954661/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
