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




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