Re: Problem with cheapo USB hub

From: Andrew Perrin <clists(at)perrin.socsci.unc.edu>
Date: Thu Nov 29 2007 - 13:13:40 EST

On Thu, 29 Nov 2007, Andrew Sackville-West wrote:

> On Wed, Nov 28, 2007 at 03:14:06PM -0500, Andrew Perrin wrote:
>> Has anyone run across this one? I bought some cheapo USB hubs; they're
>> no-name branded 7-port USB hubs. When I plug them in, they go through
>> repeated cycles of connect-disconnect, with no devices actually appearing:
>>
>> Nov 28 11:23:15 joehill kernel: usb 1-1: new full speed USB device using ohci_hcd and address 41
>> Nov 28 11:23:15 joehill kernel: usb 1-1: configuration #1 chosen from 1 choice
>> Nov 28 11:23:15 joehill kernel: hub 1-1:1.0: USB hub found
>> Nov 28 11:23:15 joehill kernel: hub 1-1:1.0: 4 ports detected
>> Nov 28 11:23:20 joehill kernel: usb 1-1: USB disconnect, address 41
>
> ...
>
>
> might be a power issue. How many devices plugged in there? are they
> self-powered or pulling from USB? SOme of the hubs have a location to
> provide power to the hub, but don't come with a brick for it :(
>
> just a thought though.
>
> A
>

And a good one, but not immediately correct. Interestingly: this comes with a brick. When the brick is *not* plugged in, I get no errors when plugging the hub in; when the brick is plugged in, I do:

Nov 29 12:53:43 joehill kernel: hub 1-0:1.0: port 3 disabled by hub (EMI?), re-enabling...
Nov 29 12:53:43 joehill kernel: usb 1-3: USB disconnect, address 86
Nov 29 12:53:43 joehill kernel: usb 1-3: new low speed USB device using ohci_hcd and address 90
Nov 29 12:53:43 joehill kernel: usb 1-3: configuration #1 chosen from 1 choice
Nov 29 12:53:43 joehill kernel: input: Logitech Trackball as /class/input/input4
Nov 29 12:53:43 joehill kernel: input: USB HID v1.10 Mouse [Logitech Trackball] on usb-0000:00:0b.0-3
Nov 29 12:53:43 joehill kernel: usb 1-6: new full speed USB device using ohci_hcd and address 91
Nov 29 12:53:44 joehill kernel: usb 1-6: configuration #1 chosen from 1 choice
Nov 29 12:53:44 joehill kernel: hub 1-6:1.0: USB hub found
Nov 29 12:53:44 joehill kernel: hub 1-6:1.0: 4 ports detected
Nov 29 12:53:44 joehill kernel: usb 1-6.3: new full speed USB device using ohci_hcd and address 92
Nov 29 12:53:44 joehill kernel: usb 1-6.3: configuration #1 chosen from 1 choice
Nov 29 12:53:44 joehill kernel: hub 1-6.3:1.0: USB hub found
Nov 29 12:53:44 joehill kernel: hub 1-6.3:1.0: 4 ports detected
Nov 29 12:53:54 joehill kernel: usb 1-6.3: reset full speed USB device using ohci_hcd and address 92
Nov 29 12:53:54 joehill kernel: usb 1-6.3: device not accepting address 92, error -110
Nov 29 12:53:54 joehill kernel: usb 1-6.3: reset full speed USB device using ohci_hcd and address 92
Nov 29 12:54:05 joehill kernel: usb 1-6.3: reset full speed USB device using ohci_hcd and address 92
Nov 29 12:54:05 joehill kernel: hub 1-6.3:1.0: hub_hub_status failed (err = -110)
Nov 29 12:54:05 joehill kernel: hub 1-6.3:1.0: get_hub_status failed

----------------------------------------------------------------------

Andrew J Perrin - andrew_perrin (at) unc.edu - http://perrin.socsci.unc.edu Associate Professor of Sociology; Book Review Editor, _Social Forces_ University of North Carolina - CB#3210, Chapel Hill, NC 27599-3210 USA

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Received on Thu Nov 29 13:14:37 2007