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When I booted my laptop today, I saw a strange message for the first time.
"Your AC adapter is not a Dell product. To continue, connect to a Dell brand adapter."
My adapter is a Dell, so I unplugged, re-plugged, and it worked OK.
I find this behavior by manufacturers offensive, but at the same time I admire their cleverness at implementing it. Assuming that the charging port on the laptop has only ##+V_{DC}## and ground, then how do they detect the brand of adapter?
I can speculate that the power supply taps out a Morse-Code-like signal on ##+V_{DC}## when first connected (MY NAME IS DELL).
Does anyone know, in fact, how they actually do it?
"Your AC adapter is not a Dell product. To continue, connect to a Dell brand adapter."
My adapter is a Dell, so I unplugged, re-plugged, and it worked OK.
I find this behavior by manufacturers offensive, but at the same time I admire their cleverness at implementing it. Assuming that the charging port on the laptop has only ##+V_{DC}## and ground, then how do they detect the brand of adapter?
I can speculate that the power supply taps out a Morse-Code-like signal on ##+V_{DC}## when first connected (MY NAME IS DELL).
Does anyone know, in fact, how they actually do it?