dara <[EMAIL PROTECTED]> writes: > Hi, > > I just wanted to report that I get this behaviour also.
[...] > I had also noticed when I got the dongle initially about 3 months ago > that it worked when directly connencted to the laptop, but not when > connected to the hub. Hi Dara, It's been a while since you asked your question, but here's an answer anyways. Apparently using certain types of transfers on a high-speed hub with a low-speed device is still unsupported: http://www.linux-usb.org/usb2.html In terms of functionality, the latest driver: [...] * Has partial support for split transactions (full and low speed transfers) through USB 2.0 hubs: [...] o You can't (yet) use full speed isochronous transfers through USB 2.0 hubs. (At least without an experimental patch.) That means: don't hook up USB 1.1 webcams, speakers, etc. to high speed buses, they'll enumerate but you won't be able to use them otherwise. Eventually of course a dozen USB 1.1 webcams will easily coexist at full data rate on a single USB 2.0 bus, using USB 2.0 hubs. The "ehci-hcd" module provides support for high-speed USB 2.0. Removing it with rmmod makes everything run as low-speed USB 1.x, and that seems to solve the problem. I tested with the dongles I have: D-link DBT-120, Belkin F8T001, AmbiCom BT2000, and IOGear GBU211. I tested plugged directly in, plugged into a hub connected directly, and plugged into a hub connected to a hub connected to a hub connected directly. -----ScottG. ------------------------------------------------------- This SF.Net email is sponsored by: IntelliVIEW -- Interactive Reporting Tool for open source databases. Create drag-&-drop reports. Save time by over 75%! Publish reports on the web. Export to DOC, XLS, RTF, etc. Download a FREE copy at http://www.intelliview.com/go/osdn_nl _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
