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It really depends on the type of camera, and how it is built.On Apple Mac Book Pros (at least recent ones), the camera light is directly connected via the power supply to the camera module, so the light can't be circumvented even via a firmware hack.
So turning off the light seems like it will become a common issue.
It has a default Data Value of REG_DWORD = 0x00000005 (5).
Based on your comments, I will assume that the following information is true: 0x00000000 (0) = LED Off 0x00000008 (8) = LED On Please note that only It is taken from: Hence, I do not see why it shouldnt be possible for built-in webcams, since they also require drivers (mine is for example up side down after a fresh install) It seems as if the design of my ASUS notebook is good in this respect.
Older (really old) Logitech cameras had a similar design.
But just to be safe, I'm one of those guys with a dark tape over the camera.