Il 02:37, venerd́ 6 dicembre 2002, Johannes Erdfelt ha scritto: > On Fri, Dec 06, 2002, Luca Rota <[EMAIL PROTECTED]> wrote: > > > Is this a self powered or a bus powered hub? > > > > Both of them. And It always gives the same problem. > > It's likely you're trying to draw too much power from the hub. The ADSL > modem requires 500ma according to the descriptors.
The root hub? The modem is connected directly to the pc (it has 2 ports). And if I connect the keyboard and the modem on root hub all it's ok. If I connect the keyboard to the 4 ports hub (without the modem) all again it's ok. But when I connect the modem (either to root hub or to 4 ports hub) I've th problem. > > This is the maximum amount of power per port, but it may only have 500ma > for all of the ports. > > Hmm, I wonder where the hub descriptor dump went. Here there's a cut from /proc/bus/usb/devices: Root Hub T: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=12 MxCh= 2 B: Alloc=236/900 us (26%), #Int= 2, #Iso= 0 D: Ver= 1.00 Cls=09(hub ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1 P: Vendor=0000 ProdID=0000 Rev= 0.00 S: Product=USB UHCI Root Hub S: SerialNumber=e400 C:* #Ifs= 1 Cfg#= 1 Atr=40 MxPwr= 0mA I: If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub E: Ad=81(I) Atr=03(Int.) MxPS= 8 Ivl=255ms Other hub: T: Bus=01 Lev=01 Prnt=01 Port=01 Cnt=02 Dev#= 52 Spd=12 MxCh= 4 D: Ver= 1.01 Cls=09(hub ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1 P: Vendor=05e3 ProdID=0604 Rev= 0.12 S: Product=USB Hub C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=100mA I: If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub E: Ad=81(I) Atr=03(Int.) MxPS= 1 Ivl=255ms Thank you, Luca ------------------------------------------------------- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
