I have the same problems and resolved it just by booting with the latest but one kernel that was automatically installed during the update from Edgy to Feisty. Obviously, the latest but one kerne was not compiled with the USB_SUSPEND-option. Now my Lide 20 works fine again.
If you do not need a kernel feature that is only available in the latest kernel, just boot the latest but one distributed by Ubuntu - no need to recompile your own kernel.
I have the same problems and resolved it just by booting with the latest but one kernel that was automatically installed during the update from Edgy to Feisty. Obviously, the latest but one kerne was not compiled with the USB_SUSPEND-option. Now my Lide 20 works fine again.
If you do not need a kernel feature that is only available in the latest kernel, just boot the latest but one distributed by Ubuntu - no need to recompile your own kernel.
Jens