I encountered the same issue when installing Fedora 23 onto my Oryx Pro (I know Fedora isn't supported, etc.). I found a solution on the Archlinux wiki that talks about using inotify to watch for changes to the brightness file and run xbacklight to adjust the backlight levels. For my own sake, I documented it, but this might help for you on Ubuntu. It really sounds like a regression with the proprietary NVIDIA drivers. Maybe a similar file-monitoring could be incorporated into system76-daemon?
http://www.moxbant.net/fedora-23-on-system76-oryx-pro/ -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1518473 Title: /sys/class/backlight/acpi_video0/brightness is broken To manage notifications about this bug go to: https://bugs.launchpad.net/system76/+bug/1518473/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
