Re:Google Forcing Nest Cameras’ Visual Indicator Light To Be On
by fyfy18 on Wednesday August 14, 2019 @10:39PM
(#20702142)
This is how Power Nap works. Even though the lid is closed and your laptop is supposedly asleep (on battery or AC), the software can still wake it occasionally.
Re:Google Forcing Nest Cameras’ Visual Indicator Light To Be On
by Godel_unicode on Wednesday August 14, 2019 @10:57PM
(#20702218)
Siphoning power from a data connection is sci-fi and not at all how Power Nap works. It's just a fancy sleep mode plus a timer.
Re:Google Forcing Nest Cameras’ Visual Indicator Light To Be On
by im3w1l on Wednesday August 14, 2019 @11:50PM
(#20702434)
I don't know what you mean by sci fi?
Consider this sensor https://martybugs.net/electronics/tempsensor/hardware.cgi
If someone used such a sensor and overlooked the parasitic mode, then that could be used even when the power was physically shut off.
Re:Google Forcing Nest Cameras’ Visual Indicator Light To Be On
by Godel_unicode on Thursday August 15, 2019 @09:43AM
(#20705100)
You appear to be suggesting that a temperature sensor and a MacBook in Power Nap mode use similar amounts of power. That is not the case.
Even in the webcam case, powering the camera CCD would take significantly more power than is supplied by the data line. You can derive this for yourself without taking one apart by realizing that the power is supplied separately for a reason.
Further, it's not the case that this would work when the power is "physically shut off". If there's no power then there's no power.
Wonder if malware could do reconfigure some chips (not necessarily macbook one) to go into parasitic power mode or something, that is when the power is supposedly off they keep running with power taken from some data connection.