On Aug 11, 2009, at 4:37 AM, Antoine Gatineau wrote:
On the machine connected to a MGE Evolutipn 1250, I got this message
during
the night :
Aug 10 23:44:17 localhost kernel: hub 3-0:1.0: port 2 disabled by hub
(EMI?), re-enabling...
Aug 10 23:44:17 localhost kernel: usb 3-2: USB disconnect, address 14
Aug 10 23:44:26 localhost kernel: usb 3-2: new low speed USB device
using
address 16
It doesn't really bother me because it is reconnected in 10 seconds
but
isn't there some issue here?
It is the kernel that disconnects the device but I wonder why...
The kernel is disconnecting it, but that is based on a signal from the
root hub hardware (probably on your motherboard).
The EMI is likely caused by insufficient isolation between the USB
hardware and the power switching circuitry in the UPS.
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