I'm relatively new to Linux (a few months) and particularly to Mint (not even a couple of weeks). I already fancy myself as a die-hard Linux user, and particularly love the Mint distro.
Anyway, like a few other people, I had an issue with the screen dimming after removing Windows to install a Linux OS (Ubuntu 12.04, originally). After some time searching for answers, I noted quite a few other people had this problem, too. Although I found a solution (and made a tutorial video about it on my Youtube page), it has left me wondering if the cause of this issue is a deliberate one. Apparently it crops up if some systems don't detect Windows running on them.
It does seem strange that certain functionalities will be shut down if the manufacturer's preferred OS isn't installed. My suspicion also seems to be supported by the fact HP won't actually permit my BIOS to be upgraded specifically because I no longer run Windows, as stated on their website. I'm interested in other people's thoughts about this.