Not sure if this is the answer, but it may help....=20
Is this a passive switch?  I know that Win2k and its relatives freak out =
if=20
the keyboard or mouse is removed and then reconnected during operation, s=
o=20
passive switches are a no-no.  An "active" switch will hold the lines on =
the=20
disconnected system such that the computer thinks they're still connected=
,=20
though no movement/key signals are possible.  So perhaps some corrupt sig=
nal=20
during the transistion/switch is freaking out the machine?

Cheers,
-Neil.



On Wednesday 20 August 2003 16:37, Jan-Erik Soderholm XA (TN/PAC) scribbl=
ed:
> Hi all.
> Just a quick check to see if anyone out there
> have had the same kind of troubles with
> a KVM (Keyboard-Video-Mouse) switch as I'm having
> right now.
>
> Scenario :
> - One 4 port KVM switch (electronic, budget model, "LinkCel PS-104").
> - One Compaq Armada M700 laptop computer running Win2000.
> - One "noname" fairly standard minitower P-III PC running Win2000.
> - A common keyboard and mouse (Microsoft original).
> - One Samtron 17" LCD screen.
>
> Now, the standard PC works just fine.
>
> But the Compaq Laptop is having a number of different problems,
> such as :
>
> - The mouse "clicks" by itself. Different things happens
>   depending on where the mouse pointer happens to be on screen.
>
> - The keyboard double types characters in random.
>
> - The keybaord gets into "shift lock" by itself.
>
> - The right shift key can not be used together with the
>   arrows to "select" text. (The left shift key works OK.)
>
> - When moving the cursor by holding one of the arrow keys
>   pressed, and random "4" or "6" might be "typed". The actual
>   character seems to be depending on what arrow key is pressed.
>
> Now, I have been in contact with the support dept. at the
> distributor, and they says that "yes, there might be some
> trouble on some laptops". They also claim the cause to be
> "to low levels".
>
> I have monitored the PS/2 lines with oscope, and the levels
> are 0-5 volt on both systems. I can not "see" any other major
> difference. I'v not been able to "listen" to the lines to see
> if there is any difference in the character streems sent.
>
> Well, that's more or less all.
>
> Now, has anyone seen similar problems with KVM switches and
> laptops ? And is there any reason a laptop should have
> different signals on it's keybord and mouse ports ?
>
> Jan-Erik.

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