Comment by avian
7 hours ago
> In theory we could have a popup box that tells you that both your computer and other device support higher speeds/more power, but your cable is limiting it.
I'm pretty sure my old Dell XPS laptop with Windows 10 had pop-ups just like this.
"This device can run faster" or something.
AFAIK that's just when plugging in a USB 3 device into a USB 2 port or using a USB 2 cable.
I wonder if it's possible for a regular machine with two high speed ports to do a cable test by itself. Maybe it can't test all the attributes but could it at least verify speed claims in software?
There would be too many factors involved for a proper test. Many laptop USB controllers would probably not even have the capacity to run two ports at full speed simultaneously.
I strongly suspected my old xps had nonstandard things going on with its USB C charger
Even Apple now has one of those, when you plug something into the USB 2 port on the MacBook Neo.
There’s still nothing when you plug a usb3 device in using a usb2 cable.