On Sat, 16 Apr 2011, Marcel wrote: > I hooked up the analyzer between the G45 and HUB. While not communnicating > with the devices, the HUB disconnects and the analyzer shows one bad Frame > Length error. What direction is the packet that gets the error? Is it OUT from the G45 to the hub? > This is all I see. After this the HUB reconnects. Everytime this > happens I see a bad frame length error. > This doesn't really sound very hopeful to me :-( The reconnect is more or less, once a disconnect occurs. The reason for the disconnect isn't clear. The upstream port on a high-speed link tells when the downstream port has disconnected by monitoring the signal amplitudes on the data lines; the change in impedance when the downstream port's high-speed terminations are removed causes them to change. This is explained in detail in section 7.1.7.3 of the USB-2.0 specification. 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
