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I got a second hand Zonet KVM3322 (USB switcher). There's supposed to be a keyboard hotkey combination that can be used to switch between the two attached computers (instead of manually click on the appropriate button on the device). I cannot find the manual online that would tell me what the hotkey combination is.

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Have you tried the "default" ones? Scroll lock is one, ctrl is another. Both of them requires double tap, eventually combined with a press on either of the arrows. – Frederik Nielsen Jul 26 '12 at 17:20
Double Scroll Lock did the trick! I'd be happy to accept your answer if you want to write it up as an answer rather than a comment. Thx! – Philipp Schmid Jul 27 '12 at 2:24
up vote 1 down vote accepted

The default button for many KVM switches is double tap scroll lock

An alternative can be double tap ctrl, but I haven't seen that been used that many places.

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