AA1 won't see USB printer unless its connected at power up

Hi Folks,

I have setup an HP DJ 5650 printer on the AA1 and it works fine PROVIDED that I boot with the USB lead/printer plugged in. Coming out of hibernation or plugging in the printer post-boot it's not detected. I have loaded the HP GUI-based setup utilities but they also show the printer as 'not detected' unless I reboot.

Any thoughts on how to kick a rescan of the USB bus, or make the AA1 aware of the printer when it's hot plugged or the unit comes out of hibernation? I also have an MS USB mouse and this is always detected whenever I plug it in.

At the moment, if the printer doesn't work I have to reboot and then any queued print jobs spring into life. I have tried all the USB ports and also moving the printer from one to another but this makes no difference.

Thanks