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I recently installed 12.04 64 on my Samsung X360 and most of the hot keys work (Volume, disable mousepad, num/scroll locks, display, battery). However, when adjusting brightness, there is only two levels - full and i guess 90%.

Any suggestions on how to increase the range of brightness levels for the hotkey?

Additionally Wifi enable/disable doesn't work either but that is less of a priority right now

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I had a similar issue on my samsung N110 after installing 12.04, and installing samsung-tools and samsung-laptop from the voira ppa worked for me. I also had to install samsung-backlight. See this similar question for details: Samsung netbook N150Plus screen brightness not working

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