Two USB ports dissappeared...

Mikkel L. Ellertson mikkel at infinity-ltd.com
Fri Aug 7 00:47:17 UTC 2009


Steven P. Ulrick wrote:
> 
> Hello Jack
> Using the following command: "grep -i usb dmesg" I got the following:
> http://www.afolkey2.net/~steve/dmesg-20090806
> 
>  "grep -i hub dmesg" returned the following:
> hub 1-0:1.0: USB hub found
> hub 1-0:1.0: 6 ports detected
> hub 2-0:1.0: USB hub found
> hub 2-0:1.0: 6 ports detected
> hub 3-0:1.0: USB hub found
> hub 3-0:1.0: 2 ports detected
> hub 4-0:1.0: USB hub found
> hub 4-0:1.0: 2 ports detected
> hub 5-0:1.0: USB hub found
> hub 5-0:1.0: 2 ports detected
> hub 6-0:1.0: USB hub found
> hub 6-0:1.0: 2 ports detected
> hub 7-0:1.0: USB hub found
> hub 7-0:1.0: 2 ports detected
> hub 8-0:1.0: USB hub found
> hub 8-0:1.0: 2 ports detected
> 
> Anyone's help in interpreting all of this is greatly appreciated.
> 
> Steven P. Ulrick
> 
You really need the messages before the USB messages to tell what is
going on. Each USB port is usually connected to two hubs, One for
USB 1.1 and one for USB 2.0. I suspect that the 6 port hubs are USB
1.1, and the 2 port hubs are USB 2.0 because of the speed
difference. You can find out by running lsusb and comparing the bus
number with the USB number:

Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

You may also want to take a look at /proc/bus/usb/devices. You may
find it more readable then lsusb -v.

Mikkel
-- 

  Do not meddle in the affairs of dragons,
for thou art crunchy and taste good with Ketchup!

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