I have dell E6520 laptop with latest ubuntu 12.04. I also have the EC (ExpressCard) with the USB3.0 ports. The card is recognized by ubuntu (I can see in in lspci), but when I plug in the external USB3.0 HDD into the slot nothing happens - hot-plugging the drive does not work.
The same drive works as hot-plug into the USB2.0 port (built-in); it also works as USB3.0 if I plug it in before boot and boot with it plugged in.
How can I sort out this hot-plugging issue with USB3.0 ?
NOTE: when firstly installing ubuntu 12.04 the hot-plugging the same USB3.0 into the same EC car did work! It stopped working after upgrade to a new kernel.