Description of problem: The shortcut key to change brightness of the the screen on Lenovo Y450 is recognised, however the screen brightness does not change. The shortcut key is Fn + Up Arrow/Down Arrow.
The same problem on Lenovo Ideapad S205. Do you have problem described here? https://bugzilla.redhat.com/show_bug.cgi?id=748210 When you switch off/on the backlight, the system crashes.
This is likely a duplicate of 748210 as Václav suggested. If a kernel with that fix comes out and you still have issues, please reopen. *** This bug has been marked as a duplicate of bug 748210 ***
(In reply to comment #0) > Description of problem: > The shortcut key to change brightness of the the screen on Lenovo Y450 is > recognised, however the screen brightness does not change. The shortcut key is > Fn + Up Arrow/Down Arrow. You may have installed the proprietary nVIDIA driver. You need to modify the xorg.conf. First execute nvidia-xconfig as root, and then edit /etc/X11/xorg.conf, change the Device section like this: Section "Device" Identifier "Device0" Driver "nvidia" VendorName "NVIDIA Corporation" Option "RegistryDwords" "EnableBrightnessControl=1" EndSection (Notice the "Option" line) (This is NOT a bug)