This might help you in that case:
[edit] the steps described will be slightly different on Fedora:
- Edit
/etc/default/grub(as root/sudo), change the line:
GRUB_CMDLINE_LINUX="rhgb quiet"
to
GRUB_CMDLINE_LINUX="rhgb quiet acpi_backlight=native"
- Regenerate grub:
$ sudo grub2-mkconfig -o /boot/grub2/grub.cfg
Reboot.