I tried making my own USB Y cable. Here is what I have
Connection between Samsung USB Cable and USB Hub are connected on all 4 wires (red white green black). The connection from the Wall Charger is only connected on red and black.
My SGT charges fine, but won't recognize any device hooked into the Hub.
The Hub light also only lights up quickly when a device is plugged in or turned off, but it still seems to receive power. When I plug in my flash drive, it lights up bright for about 2 seconds then goes off. So maybe the Hub isn't seeing a data connection between it and the Tab?
Any suggestions? I'm also on slim's 2/20 build I think