Found some help on https://wiki.edubuntu.org/LaptopTestingTeam/HPCompaq6930p/Intel .
Executing "xrandr --output LVDS --set BACKLIGHT_CONTROL native" make the brightness fn key work on Acer 5315 laptop. -- Cannot change screen brightness on Fujitsu T2010 laptop in Intrepid https://bugs.launchpad.net/bugs/220407 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs