Thanks. I updated my bios using freedos (which was surprisingly easy to do!).
sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date V1.30 08/13/2012 This does not fix the problem. If I restart my laptop without the workaround, the effect is still the same. When I change brightness, I see the slider changing, but the brightness stays the same. ** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1399611 Title: Screen brightness not working acer aspire 5742 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1399611/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs