I have a server that seems to have a problem with USB devices. At first I thought it was the USB3 controller (v0.96 of USB3 spec or something like that - see previous thread) but I'm getting the same sort of problem with USB2 devices on the on-board controller. It's a HP ML380G5 server and has performed flawless for a few years now so I'm reluctant to point the finger at that... more likely to be a glitch in Linux. The error I'm getting is "usb 1-6: usb_sg_cancel, unlink --> -43", and google shows no results for "usb_sg_cancel, unlink --> -43" (in quotes) which is not what I would have expected if there was a known regression in the USB code. I'm running Debian kernel linux-image-3.2.0-2-amd64 - 3.2.12-1. I've already upgraded once when this happened last time but it's not a server I can reboot lightly. Any suggestions? The same USB devices seem to work fine in other computers. And the USB3 controller I thought was bad worked fine in another HP server (low end server though - ML110G6) Thanks James