@mwicharyMarcin Wichary @atomicbirdTom Harrington @DrwaveMichael B. Johnson I’ve encountered so many “USB-C” issues where the cable turned out to be the problem that I’ve bought these two devices to test cables:

BitTradeOne USB cable checker: https://bit-trade-one.co.jp/en/adusbcim/

ChargerLAB POWER-Z USB port tester: https://www.power-z.com/products/chargerlab-power-z-km003c

The first device shows me cable CONNECTIVITY—it’s shocking how many “USB-C” cables don’t have all their pins connected. It also shows you how much resistance the cable exhibits, which limits power application.

The second device displays various software queries. The most important is the cable’s E-Marker identifier, which tells you what protocols it supports. The device also lets you snoop on what’s going on in the cable when it is connected.

I went through my bucket of “USB-C” cables and threw out a bunch of them because they failed one test or another which made them booby traps for when I want to use them.

BONUS: the first device also tests adapters e.g. USB-A to C as well.