> > Also, some USB hubs may not provide the full spec of power to every port > on the hub if you happen to be using all of them. I'm using 5 of the 6 > available ports on my little powered Zonet USB2 hub (with transfer rate > to prove it!) but if I add my 2.5" external notebook hard drive to the > last available port, the drive doesn't get enough juice to power up and > make a connection. Directly connected to the computer, it works fine. > > If it's really a USB1 hub, it may not be providing enough power for > everything connected to the hub when you plugged your keyboard into? hello i had quite similar experiences with usb hubs and usb soundcards and also midi interfaces the usb sounddevice for instance, wanst working over a unpowered usb hub, and of course doing his job when connected directly. and some interfaces may not work correctly like described above. for instance the usb midisport 2x2. i coulnd get it working to provide midi signal out into old analog syntesizers ( i guess they are more sensitive or have more powerconsumption, i dont know, on the midi site ). i had to route it through powered midi i/o ports to get it working. so i gave that interface away. i dont know if this has anything todo with alsa, i dont think so. best m > > -- > David > gnome@xxxxxxxxxxxxx > authenticity, honesty, community > _______________________________________________ > Linux-audio-user mailing list > Linux-audio-user@xxxxxxxxxxxxxxxxxxxx > http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user > ----- End forwarded message ----- _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user
