I've run into two issues with Lantronix based KVMs on various servers and here's how I solved them (with that said I like these units as they are Java based and OS independent and work very well, unike some other models like Startech).
1.) If you are connected by USB only and you're sure USB support from the BIOS is enabled, you just need to click the following in Lantronix
Interfaces -> Keyboard/Mouse
Check "Force USB Full Speed Mode", this fixed the issue for me and I was able to access the BIOS and select OS boot options etc..
*Save Settings
2.) If you are connected by USB but dont' have BIOS support for USB and if you have PS2 connected go to:
Interfaces -> Keyboard/Mouse
Change -> "Host Interface" to "PS/2"
*Save Settings
I hope this helps someone as it can be a waste of time for both the customer and datacenter when this happens by preventing unnecessary work and troubleshooting.
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