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I'm using Ubuntu 12.04 on a Toshiba Satellite P775-S7100. The keyboard backlight was working initially, but after reinstalling the same version of Ubuntu it stopped working, and as far as I can tell, it doesn't interact with Ubuntu at all. Is there any way to fix this short of reinstalling Ubuntu again?

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    This doesn't make sense. I mean, if you installed the exact same version, it should be worked. Is your system up to date? Maybe, on old installation, you used any extra configuration about backlight ?
    – NickTux
    Jun 13, 2014 at 3:32
  • The first time I installed Ubuntu it worked fine by default, so I expected it to after I reinstalled too. It's possible something in the hardware broke around when I reinstalled. Jun 14, 2014 at 20:15

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