I do the majority of my flying on Virgin Australia. I tried out the latest iteration of their tablet-based IFE this week – Samsung tablets connected to onboard wireless that serves content.
I was impressed to find that the only way to change the brightness on this otherwise OK IFE experience (well, it’s Android, and it crashes a lot, but it mostly does the job) was to shine my iPhone’s flash at the ambient light sensor on the top of the Samsung tablet. Otherwise, the tablet defaulted to a very dim screen, and since they’d locked out all forms of brightness control, this seemed to be the only way.
A+ user experience, Virgin Australia/Lufthansa (whom I believe this product is licensed from).