HardwareBanter - View Single Post - cannot power "on" ASUS laptop after power outage

**Computer Nerd Kev**

In comp.sys.laptops DecadentLinuxUserNumeroUno wrote:
On Sun, 18 Oct 2015 03:40:20 +0000 (UTC), lid
(Computer Nerd Kev) Gave us:

Laptop PSUs should have current limiting in them too,

I did not say a damned thing about current limiting.

It is surge sensing. If your PC is up with its 1000W supply only
using 250W of it, and you try to add a hard drive while it is live, you
can cause the entire supply to shut down, even though the HD and all of
its inrush only taxed the rail a few more watts. It can also happen
merely adding a CD or DVD reader as well. It is the change it senses,
even if well below its max capacity.

Hot swap supplies do not do this function. ATX supplies do. That is
why they are so hard to use as a bench supply.

but if a laptop
is on the edge of the maximum current from a PSU, then it could shut
down intermittently or have other problems, the cause of which may not
be clear to the user.

Hardly a difference one would experience in your example of a mere 0.5
amp differential. Now try to move the goal posts again.

You're clearly after an argument. I'm just suggesting the way that a
standard for laptop power connectors could be implemented, bringing
up largely irrelevant points isn't going to get anywhere whether
they're right or not.

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