This only means that no interrup transfers have been made.
Yes, it is strange since the hubs generate an interrupt
transfer when a device comes or goes.  So maybe your host
controllers needs some prodding to behave correctly.

	-- Lennart

Chris Tribo wrote:
> I'm working remotely and I can't plug or unplug anything right now, but 
> this looks strange.
> 
> -bash-3.00# usbstats
> Controller /dev/usb0:
>         34 control
>          0 isochronous
>          0 bulk
>          0 interrupt
> Controller /dev/usb1:
>         93 control
>          0 isochronous
>          0 bulk
>         27 interrupt
> Controller /dev/usb2:
>         34 control
>          0 isochronous
>          0 bulk
>          0 interrupt
> Controller /dev/usb3:
>         34 control
>          0 isochronous
>          0 bulk
>          0 interrupt
> Controller /dev/usb4:
>         49 control
>          0 isochronous
>          0 bulk
>          0 interrupt
> 
> Looks like interrupts are only firing for the one controller that 
> consistently attaches devices. There are devices attached to at least 
> one port on every hub.
> 
> 
> 
> On Feb 4, 2005, at 5:23 PM, Lennart Augustsson wrote:
> 
>> Compile with USB_DEBUG and try turning on some debugging.
>>
>> Chris Tribo wrote:
>>
>>> I just tried plugging a keyboard, usb flash drive, and mouse into 
>>> some of
>>> the ports and leaving them there for at least two minutes, nothing.
>>> There's no brief flash of the LEDs in the mouse that normally happens
>>> when you plug it in even if it's not enabled. Should I bring in a multi
>>> meter and see if the port power is just plain off?
>>> right now there are five device connected but only two have attached.
>>> addr 1: full speed, self powered, config 1, UHCI root hub(0x0000),
>>> Intel(0x8086), rev 1.00
>>>  port 1 powered
>>>  port 2 powered
>>> Controller /dev/usb1:
>>> addr 1: full speed, self powered, config 1, UHCI root hub(0x0000),
>>> Intel(0x8086), rev 1.00
>>>  port 1 addr 2: low speed, power 100 mA, config 1, DELL USB
>>> Keyboard(0x2003), DELL(0x413c), rev 1.00
>>>  port 2 addr 3: low speed, power 40 mA, config 1, product 
>>> 0x4d09(0x4d09),
>>> Primax Electronics(0x0461), rev 0.10
>>> Controller /dev/usb2:
>>> addr 1: full speed, self powered, config 1, UHCI root hub(0x0000),
>>> Intel(0x8086), rev 1.00
>>>  port 1 powered
>>>  port 2 powered
>>> Controller /dev/usb3:
>>> addr 1: full speed, self powered, config 1, UHCI root hub(0x0000),
>>> Intel(0x8086), rev 1.00
>>>  port 1 powered
>>>  port 2 powered
>>> Controller /dev/usb4:
>>> addr 1: high speed, self powered, config 1, EHCI root hub(0x0000),
>>> Intel(0x8086), rev 1.00
>>>  port 1 powered
>>>  port 2 powered
>>>  port 3 powered
>>>  port 4 powered
>>>  port 5 powered
>>>  port 6 powered
>>>  port 7 powered
>>>  port 8 powered
> 
>