Ah that's easy then. There is no backlight and we don't support it yet. This problem with OLED is being tracked in https://trello.com/c/JVHWYLLa/68-2004-support-adjusting-brightness-on- oled-panel
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1851833 Title: [Sager Clevo notebook model PB50_70RF,RD,RC] Unable to adjust brightness of backlight To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1851833/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs