I've tested it, but the bug still exist in the upstream kernel. If I write "acpi_backlight=vendor" into grub it works again.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/941286 Title: Setting brightness doesn't work out of the box on Acer Extensa 5235 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/941286/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
