Can't change brightness F18 Lenovo

view story

http://forums.fedoraforum.org – Hi, I'm configuring my Fedora and at start all was good, but now I can't change brightness over the keyboard and system control, but it works over this command: Code: echo 5 | sudo tee /sys/class/backlight/acpi_video0/brightness It decrease brightness well, I think it might be problem with modules or services. Please help, thanks (HowTos)