On Thu, 17 Mar 2005, Bob Lockie wrote: > 4 port PCI USB2 card with 4 port hub connected: > > bash-2.05b# lsusb > Bus 003 Device 001: ID 0000:0000 > Bus 002 Device 001: ID 0000:0000 > Bus 001 Device 004: ID 05e3:0605 Genesys Logic, Inc. > Bus 001 Device 001: ID 0000:0000 > > 4 port PCI USB2 card without hub: > bash-2.05b# lsusb > Bus 003 Device 001: ID 0000:0000 > Bus 002 Device 001: ID 0000:0000 > Bus 001 Device 001: ID 0000:0000 > > Maybe some can explain why there are not 4 busses (1 for each port)?
Buses aren't the same thing as ports. Your card has 3 USB controllers (hence 3 buses). Probably one of them is high-speed and connects to all four ports, while the other two are full/low-speed and are attached to two ports each. It's a little confusing because high-speed buses are considered logically separate from full/low-speed buses, even though they communicate over the same cables and ports. Alan Stern ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
