Hello, i use speakup and brltty with a optelec voyager 44 on grml linux. If i plug in the voyager brailledisplay directly in into my netbook, all works well. If i plug in the brailledisplay into a usb-hub with a extra poweradapter, the brailledisplay works, but the keys of the voyager wil not work. What can i do, so that the brailledisplay works correctly. Regards. Dietmar