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unable to enumerate USB device: APCUSBD

I have a APC 750 with the usb port connected to a 12.04 Unbutu
system.

After about a day of operation I start getting the following error:

Aug 31 23:13:57 ubuntu3 kernel: [128564.632031] hub 2-0:1.0:
unable to enumerate USB device on port 3

Checking the syslog I find the following repeated over and over,
with the device number going up by one each time:

Aug 31 23:13:25 ubuntu3 kernel: [128532.951308] hub 2-0:1.0: port
3 disabled by hub (EMI?), re-enabling...
Aug 31 23:13:25 ubuntu3 kernel: [128532.952063] usb 2-3: USB
disconnect, device number 110
Aug 31 23:13:25 ubuntu3 kernel: [128532.952267] usb 2-3: ctrl urb
status -62 received
Aug 31 23:13:25 ubuntu3 kernel: [128533.260039] usb 2-3: new
low-speed USB device number 111 using ohci_hcd
...
Aug 31 23:13:27 ubuntu3 kernel: [128534.796543] generic-usb
0003:051D:0002.006F: hiddev0,hidraw2: USB HID v1.10 Device
[American Power Conversion Smart-UPS 750 FW:651.13.D USB FW:7.3]
on usb-0000:00:02.0-3/input0
Aug 31 23:13:33 ubuntu3 apcupsd[4213]: Communications with UPS
restored.
...
Aug 31 23:13:56 ubuntu3 kernel: [128563.596881] hub 2-0:1.0: port
3 disabled by hub (EMI?), re-enabling...
Aug 31 23:13:56 ubuntu3 kernel: [128563.597605] usb 2-3: USB
disconnect, device number 111
Aug 31 23:13:56 ubuntu3 kernel: [128563.597838] usb 2-3: ctrl urb
status -62 received
Aug 31 23:13:56 ubuntu3 kernel: [128563.900049] usb 2-3: new
low-speed USB device number 112 using ohci_hcd
Aug 31 23:13:56 ubuntu3 kernel: [128564.137852] usb 2-3: can't
set config #1, error -62
Aug 31 23:13:56 ubuntu3 kernel: [128564.138747] hub 2-0:1.0: port
3 disabled by hub (EMI?), re-enabling...
Aug 31 23:13:56 ubuntu3 kernel: [128564.139398] usb 2-3: USB
disconnect, device number 112

until it reverts to this error message

Aug 31 23:13:56 ubuntu3 kernel: [128564.384041] hub 2-0:1.0:
unable to enumerate USB device on port 3
Aug 31 23:13:57 ubuntu3 kernel: [128564.632031] hub 2-0:1.0:
unable to enumerate USB device on port 3
Aug 31 2

with the last message repeated 3 times a second after that.

Does this suggest a problem with the APC unit ? (it is directly
connected to the computer port) or a ubuntu issue ?

bill

Comments

Re: unable to enumerate USB device: APCUSBD

By Tommy Trussell at 09/05/2012 - 12:32

On Sat, Sep 1, 2012 at 9:12 AM, william drescher < ... at techservsys dot com>wrote:

I was curious about your question so I did a couple of Google searches and
found a lot of reports of similar issues. I also have an APC UPS but I
don't have anything connected to its USB port.

1) Was your Ubuntu 12.04 system upgraded from a previous version or a new
install? A few of the reports indicated a problem with an old unsupported
driver that could be disabled to eliminate the error.

2) For diagnostic purposes, you might try connecting the UPS via a USB hub
to see if the error messages go away. You might also try connecting a USB
keyboard or mouse to the system (if you aren't using them already) to see
if you get a similar message. Some hardware apparently has trouble
supporting old slow USB devices.

3) Since you have the UPS connected to the USB port, do you also have some
special software that is monitoring it, or does the UPS port send a
generic "power down" message after a period of time? If you are running
some special software you might check to make sure it is compatible with
Ubuntu 12.04. Have you recently tested the UPS shutdown by pulling the plug?

I don't have answers that might fix your issues, but I hope those questions
(plus some searches of your own) get you closer to the answer.