Mouse / psm0 via D-Link KVM won't load on 5.4, does on 5.3

I've found that 5.4 as of today won't load the psm0 driver if the box is 
connected through a KVM instead of directly to the mouse.

When I plug the mouse directly into the box, 5.4 and 5.3 load psm0 no 
problem.

When I plug the mouse in via the KVM, 5.4 won't load psm0 but 5.3 will.

If I plug the mouse in directly at boot time under 5.4, so psm0 loads, then 
(don't do this at home) hot-unplug it and plug in the kvm-- the mouse works 
via the KVM.

Hope this helps

Sincerely

Harry Coin