Can someone explain the output from lsusb here?

[PleegWat]

Colin Law wrote:
> 2009/7/2 Karl F. Larsen <klarsen1 at gmail.com>:
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>> Colin Law wrote:
>>> 2009/7/2 Karl F. Larsen <klarsen1 at gmail.com>:
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>>>> Karl Auer wrote:
>>>>> I'm puzzled because only two of supposedly 6 USB interfaces work on my
>>>>> new Dell Vostro 1720.
>>>>>
>>>>> This is the output from "lsusb" - the first line is the built-in webcam,
>>>>> the mouse is, well, the mouse :-) and I don't understand the rest.
>>>>>
>>>>> Would some kind soul care to explain?
>>>>>
>>>>> The four interfaces that don't work - at least not with my mouse - are
>>>>> noticeably stiffer to insert the USP plug into than the two that do
>>>>> work.
>>>>>
>>>>> Regards, K.
>>>>>
>>>>> Bus 002 Device 002: ID 0c45:63e0 Microdia
>>>>> Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
>>>>> Bus 008 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
>>>>> Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
>>>>> Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
>>>>> Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
>>>>> Bus 005 Device 004: ID 045e:0039 Microsoft Corp. IntelliMouse Optical
>>>>> Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
>>>>> Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
>>>>> Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
>>>>>
>>>>>
>>>> Â  Â  Â  Â The place to check USB is in the BIOS. My guess is your BIOS has turned
>>>> off the USB devises OR your new computer is broke.
>>>>
>>> I think the OP was hoping for an explanation of the output from lsusb,
>>> I was looking forward to that also.  man usb is not particularly
>>> helpful.  Can anyone help?
>>>
>>> If the bios had disabled the usb port I would have thought that would
>>> have been clear from the lsusb output.
>>>
>>> Colin
>>>
>>        Well if he wants that do this:
>>
>> karl at karl-hardy:~$ sudo lsusb -vv
>> [sudo] password for karl:
>>
>> Bus 002 Device 002: ID 058f:6362 Alcor Micro Corp. Hi-Speed 21-in-1
>> Flash Card Reader/Writer (Internal/External)
>> ...
> 
> No, still not answering the question I am afraid.  To repeat, what we
> are looking for is an explanation of the output of lsusb, not how to
> get even more information that we do not understand.
> In other words, since I am apparently not explaining myself clearly, what does
> Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
> mean?
> 
> Also Karl please do not reply to me directly, just send it to the
> list, I do not need multiple copies of the email, and if I just reply
> to your personal email then it goes to you rather than the list.
> 
> Colin
> 

Just what I make of it offhand and from memory:

Bus 2: usb controller number. Apparently you have 8 usb controllers. 
Generally one usb controller has two ports next to each other on (or 
inside) the case.
Device 4: Sequence number of the device on the bus. These will be unique 
  on one bus.

1d6b:0002: Vendor and product ID. These are respectively 'Linux 
Foundation' and '2.0 root hub'. The former looks strange to me: I'd 
expect this ID to be hardware-bound, but maybe general-purpose devices 
like hubs don't have their own vendor ID.

After that follows the readable-string version of the vendor/product ID.


This output is especially interesting to see if something comes up. Try 
plugging your mouse into one of the ports that it doesn't work in, and 
check 'lsusb' again.
If the mouse doesn't show up there, it's likely a bios/hardware issue.
If it does, it is probably software. Checking your xorg.conf may be 
worthwhile in this case.

PleegWat