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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