unable to enumerate USB device

[Jim]

Robin Laing wrote:
> jack wallen wrote:
>> After an update (fedora 10) none of my USB devices are recognized. This
>> is what i get from dmesg:
>>
>> Jan 14 17:17:13 localhost kernel: usb 1-7: new full speed USB device
>> using ohci_hcd and address 20
>> Jan 14 17:17:13 localhost kernel: usb 1-7: device descriptor read/64,
>> error -62
>> Jan 14 17:17:14 localhost kernel: usb 1-7: device descriptor read/64,
>> error -62
>> Jan 14 17:17:14 localhost kernel: usb 1-7: new full speed USB device
>> using ohci_hcd and address 21
>> Jan 14 17:17:14 localhost kernel: usb 1-7: device descriptor read/64,
>> error -62
>> Jan 14 17:17:14 localhost kernel: usb 1-7: device descriptor read/64,
>> error -62
>> Jan 14 17:17:15 localhost kernel: usb 1-7: new full speed USB device
>> using ohci_hcd and address 22
>> Jan 14 17:17:15 localhost kernel: usb 1-7: device not accepting address
>> 22, error -62
>> Jan 14 17:17:15 localhost kernel: usb 1-7: new full speed USB device
>> using ohci_hcd and address 23
>> Jan 14 17:17:16 localhost kernel: usb 1-7: device not accepting address
>> 23, error -62
>> Jan 14 17:17:16 localhost kernel: hub 1-0:1.0: unable to enumerate USB
>> device on port 7
>>
>> I have googled the issue but am only finding instances where this causes
>> issue with booting but not an inability to mount usb devices.
>> Can anyone shed any light on this issue?
>>
>> Thank you.
>>
>> jack
>>
>
> Have you tried to plug directly into the computer?  Front and back 
> connectors?
>
> I have a few devices that don't want to work through a hub.  Just 
> something to test.
>
>
To get a hub to work with all devices, hubs must have their own power 
source externally.
Hubs that get there power source from the computer are the ones that 
give you problems, because of voltage drop across the cable to computer.