Comment 12 for bug 146710

I've been experiencing this problem on my R60 Aura T5250 Deeloy ever since I updated from BIOS 01YI (WLAN, Backlight and Brightness not working anymore).

These keys work when one is in the BIOS setup and only get disabled when the system is booting in ACPI mode. On Windows, Samsung has a tool called Easy Display Manager (on the Samsung CD and also available online) which takes over the control of these settings. So this stuff does not work on Windows either, because Samsung has disabled that recently and supplies this tool only for Windows (speaking with the tech support does help to understand the problem).

So, in case these keys work for you in the BIOS and work with this Easy Display Manager, you have the exact same problem as I have. In case anyone has the original 01YI BIOS - please contact me, maybe there is a way to downgrade.