USB hub - OpenSUSE 11.0; intermittent visibility

Hi,

I’ve installed OpenSUSE 11.0 on an Acer 5315 laptop for my wife.

Because there aren’t enough USB ports, I have a USB hub which lsusb identifies as being from Alcor Micro Corp.

When installed on the OpenSUSE 11.0 machine, the hub (and any devices connected to it) is only intermittently visible: it drops out without warning (or any particular reason I can see).

On my machine - also an Acer 5315 but running 10.3 - there’s no problem.

I realise I need to get more diagnostic info, but where should I start?

Thanks