YOJOCK USB C Tester USB Power Meter 2 in 1 Digital Multimeter 3.6-32V 0-8.0A Voltage and Current Tester, Type C Voltmeter Battery Capacity Volt Ammeter Power Bank USB Cable Charger Detector

Never had a hub not work for me. They don't even have drivers, the only indication that they're attached is via lsusb. The only reasons I can think of is; Faulty hub There's not enough power to run it and the devices or voltage is too low. There's a issue with the host port, watch "dmesg -w" for errors as you're plugging things in. Get you one of these... https://www.amazon.com/YOJOCK-Multimeter-Voltmeter-Capacity-Detector/dp/B09T3KHBFL That'll help you troubleshoot USB problems by watching voltage and current draw for dips and surges. USB shouldn't drop below 4.8v for proper operation and the port's current limits varies depending on the generation and what not. Typically 500ma for USB 2 and 1amp for USB 3 on a computer's ports.

Yeah, it's normal. That's what these smart chargers do now. Figure out the power equation stuff. I have 4 different Smart Chargers, Anker, Iniu, Monster, Topadre and they all do that. The high / er powered USB cables have the E-Marker Chip that talks to and communicates ( i.e. Handshake 🤝 ) with the charger and it takes a few moments for the charger power control / delivery components and software to figure it all out and come up with and deliver a solution ( the charging of the device ). 🤣🤣🤣 ​If the handshake 🤝 fails or the chips disagree, the devices usually fall back to standard USB BC 1.2 (Basic Charging) to maintain safety, which is why your device might sometimes show "Slow Charging" if the E-Marker is faulty, incompatible, or the cable is of poor quality. So, if you get a slow charge warning on your device, make sure you have quality cables and that they have that E-Marker chip in them. Or check with a known "Good" cable or cable testing device. https://a.co/d/0i4dbEOE https://a.co/d/07xM8kJk ✌🏽✌🏽✌🏽