I am on a KVM between a WinXP and NASLite v2.03. I do NOT experience this problem with this particular KVM ( I use a built-in toggle switch to switch between systems (NOT a keyboard-stoke combination). However, I also have another (different type) KVM between two WinXP systems, and this type of "lockup" occassionally (not always) happens there. I believe it is a KVM (hardware) issue, but as
Grumpa questions ... it could also be dependent on motherboard (BIOS) and power state (S1, S2, etc).
Now to something really crazy: back to the first KVM (NASLite on one side, WinXP on the other). Last night I powered down the NAS (using front panel power switch) ... it shutdown normally ...
but the HDD cooler fans were still spinning

while everything else seemed to be "off". This system has no power-switch on the PSU ... so I pulled the power cord ... the fans were still spinning !!!!!

I let them run for a while (with the power cord unplugged) ... until I thought to pull the keyboard cable that runs from the KVM -- the fans stopped ! When I plugged that KVM keyboard cable back in, one pair of fans (a pair for each of the two HDD coolers) started up again, the pair started up after I manually "kick-started" them ... additional details: a] all connections are PS/2 (not USB); b] these HDD coolers are each on same 4-pin Molex as the respective HDD they serve, and the system fans (CPU and case fan) are on 3-pins direct from motherboard.
VERY ENTERTAINING ... I won't try to further analyze this ... but it amazes me that the power from the KVM (it DOES have an UNUSED wall-plug socket) coming from the other side (the WinXP machine, which still powers the KVM) running into the motherboard back into the PSU can power the 4-pin Molex sufficiently for these fans to be active. (One of these days I'll eliminate the KVM and experiment with the NAS some more ...)

Georg