USB devices cause wakeup by being connected or disconnected

[e64]

For some reason, on my hack, disconnecting or connecting USB devices causes the machine to wake from sleep. I've tested it with a printer and multiple flash drives, meanwhile my real Macbook does not wake for such an event.

For example, if I unplug a USB flash drive while it is sleeping, the logs contain:

Jun 29 22:32:42 iMac kernel[0]: USB (XHCI Root Hub USB 2.0 Simulation):Port 1 on bus 0xa connected or disconnected: portSC(0xe0202a0)
Jun 29 22:32:42 iMac kernel[0]: Wake reason: XHC
Jun 29 22:32:42 iMac kernel[0]: The USB device v125w (Port 1 of Hub at 0x14000000) may have caused a wake by being disconnected

I have checked in the BIOS for any options related to the USB configuration or power management, nothing seems to help.

Any ideas?

 

[e64]

Anybody have any ideas here?

 

[lieder1987]

This happens with my real mac as well so I assume it is just part of OSX.