Today I reinstalled my laptop with a Ubuntu 17.10 and the system show the same problem. When the first boot finised I looked for the files on the /sys/class/backlight folder but this folder was empty. I changed /etc/default/grub with GRUB_CMDLINE_LINUX_DEFAULT="nomodeset acpi_backlight=vendor" as Kaihengfeng said. I ran update-grub and reboot, with the same result; /sys/class/backlight folder is empty. The brightness keys don't work. What can I do?
The laptop is working but I have problems when I work on a room with hight level of light. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1758496 Title: Backlight does not work on a MacBookAir3,2 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1758496/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
