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I have recently installed xubuntu on top of normal ubuntu on my computer. A problem that is really bugging me is that whenever I close the lid on my computer, it will go to sleep, as usual, but when I open the lid after I close it, my computer wakes up, but in a super dim mode. I have set a hotkey to make the screen brighter (and one to make it dimmer) and they work usually, but not when this happens. My screen gets to a dimness level that is nearly impossible to see, unless I go into a dark room with my computer, and wait for my eyes to adjust to the low light level, and then I can see my screen faintly, just enough to be able to reboot it. After rebooting, the screen is fine. Anyone know a solution???

My computer is a mid-2012 MacBook Pro

Thanks in advance :D

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