bjoernvold.com

Posted: **23 Nov 2010, 02:51**

It appears that my front two usb ports are out - yet lshw is finding them. Everything I plug into them, it acts as if isn't even there.

When I run lshw, I get this for the usb (there are indeed a total of four usb ports on this thing, two front, and two back):

Code: Select all

        *-usb:0
             description: USB Controller
             product: 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #1
             vendor: Intel Corporation
             physical id: 1d
             bus info: pci@0000:00:1d.0
             version: 02
             width: 32 bits
             clock: 33MHz
             capabilities: uhci bus_master
             configuration: driver=uhci_hcd latency=0
             resources: irq:16 ioport:e800(size=32)
        *-usb:1
             description: USB Controller
             product: 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #2
             vendor: Intel Corporation
             physical id: 1d.1
             bus info: pci@0000:00:1d.1
             version: 02
             width: 32 bits
             clock: 33MHz
             capabilities: uhci bus_master
             configuration: driver=uhci_hcd latency=0
             resources: irq:19 ioport:e880(size=32)
        *-usb:2
             description: USB Controller
             product: 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #3
             vendor: Intel Corporation
             physical id: 1d.2
             bus info: pci@0000:00:1d.2
             version: 02
             width: 32 bits
             clock: 33MHz
             capabilities: uhci bus_master
             configuration: driver=uhci_hcd latency=0
             resources: irq:18 ioport:ec00(size=32)
        *-usb:3
             description: USB Controller
             product: 82801DB/DBM (ICH4/ICH4-M) USB2 EHCI Controller
             vendor: Intel Corporation
             physical id: 1d.7
             bus info: pci@0000:00:1d.7
             version: 02
             width: 32 bits
             clock: 33MHz
             capabilities: pm debug ehci bus_master cap_list
             configuration: driver=ehci_hcd latency=0
             resources: irq:23 memory:febffc00-febfffff

How do I diagnose why the front two ports aren't working (or even if technically they indeed are or are not)?

Thanks.

Posted: **23 Nov 2010, 16:19**

Pin Number Cable Colour Function
1 Red VBUS (5 volts)
2 White D-
3 Green D+
4 Black Ground
here is the pin out configuration of a usb port and cable

of any of these pins are failing to make a good contact the connection will be flaky at best if it works at all.
usually with cables substitution is the fastest way to find the issue and close inspection of the contacts can reveal a lot more.
your usb controller is on the board so if your front usb is out your connector may be faulty or reversed (some connectors did not have an index pin but relied on proper position on the board)

the numbers on the board required a magnifying glass and a lot of light to see (if they were shown on the board at all)
the number 1 pin should be marked in any case.

hope this helped! :mrgreen:

Posted: **23 Nov 2010, 17:42**

Okay I'll check it out then soon as I can shut down. Thank you!

bjoernvold.com

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