Hello, On Thu, 22 Apr 2021 07:49:38 +0200 Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> wrote: > Not a bug, this is how USB works. Your first hub really does not have > enough bandwidth for that device. Well, we think it doesn't, the > calculation for that is really really tricky and we error on the side of > "let's not take the risk and just disable the device to be safe". > > Get a better hub :) But why the calculation is different when the hub is plugged into the onboard USB 2.0 controller -- and there it works? I hope you don't take this as a bug report to make it stop working there as well. :) If it's because the Etron controller is USB 3.0, and the higher speeds are somehow accounted for in the bandwidth calculation, that doesn't seem right, since both of the plugged in downstream hubs are 1.1/2.0-only. -- With respect, Roman
