I have recently acquired an Encore USB KVM switch to handle both my desktop and laptop computers. Both computers are dual boots (Ubuntu 12.04/Windows 7 and Ubuntu 12.10/Windows 8). I have connected to the KVM USB ports my Microsoft Natural Ergonomics 4000 keyboard and my Microsoft Wireless Mouse 5000 mouse. The mouse works OK and for the most part the keyboard works too, except that all of the advanced keys (multimedia, home, mail, etc.) and, more important, the Fn keys, don't work. They do work if I connect my keyboard directly to any of the independent PCs.
This issue of non working keys also happens if I boot the PC's in Windows. Not having the Fn keys is a deal breaker for me :-(
Any solution for this?