On Wed, 21 Mar 2012, Pham Ngoc Hai wrote: > Hi, > > I have a Samsung galaxy S2 with an OTG cable, I have disable all the white-list features of the kernel. Now > when I connect the slow USB� mouse to the OTG cable, the phone can > detect the mouse and I can use the mouse, but if I connect a powered hub to� the OTG cable and then connect the mouse to the hub, the phone cannot detect the mouse anymore. > > Phone - OTG cable - Mouse�� < works� (1) > > Phone - OTG cable - USB2.0 Thumb Driver � < works > > Phone - OTG cable - USB2.0 Powered hub -� Mouse� < DOES NOT work (2) > > Phone - OTG cable - USB2.0 Powered hub -� USB2.0 Thumb Driver < works Judging by the logs you provided, it looks like your hub doesn't work well with low-speed devices. Or maybe it just doesn't work with that particular mouse. Try a different brand of hub. Incidentally, all those lines like > e263d180 2427795268 C Ii:2:002:1 0:2048 1 = 10 > e263d180 2427795275 S Ii:2:002:1 -115:2048 1 < in your log indicate there's a bug somewhere on your system. Maybe in the host controller driver or maybe in the hub's descriptors. What does "lsusb -v" show? Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
