unable to enumerate USB device: APCUSBD

[william drescher]

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