Cort@lemmy.world 1 day ago
noting that the USB-PD standard did not emerge yet
Doesn’t even matter. Asus still pulls this shit on their USB PD laptops and tablets. At the very least they do allow 65w instead of the full 100w if you use another brand’s USB PD charger.
daveyOsborn@infosec.pub 1 day ago
I’m not grasping what you’re saying. What is it that asus is doing on their USB PD laptops and tablets?
Cort@lemmy.world 1 day ago
Reduced amp draw on non Asus power supplies
daveyOsborn@infosec.pub 1 day ago
Oh, so to be clear, an asus laptop that expects a USB PD supply can still detect whether or not it’s an OEM charger? And when it’s non-asus, it distrusts the capability and only draws 65w even if the PSU can do 100w?
IIUC, that’s a bit fucked up. I’ve read claims that either USB PD or the proprietary 3-pin predecessors are supposed to be smart enough so appliances can go easy on PSUs that are not up to the full load, but I was expecting USB PD to not have vendor favoritism problems like that. I appreciate the tip. Seems like another gotcha that can even burn above average consumers who know to a reasonable extent what they are doing.
Cort@lemmy.world 22 hours ago
Yes, I believe you understand correctly.
And yes Asus laptops/tablets reject full power charging on any non Asus USB PD PSU, even when the alternative brand is better. I’ve tried a couple including the 180w framework