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Short version:

ISY IPG 300 mouse, connected to Aten CS 692 KVM switch, stutters on both connected computers - cursor lags as if its position was refreshed only around four times per second. On different mouse, different switch, or with the same mouse but without switch everything works normally.

Slightly longer:

I have two computers (gaming beast and small linux box) setup. I use one monitor and set of input peripherials with a two-port KVM switch inbetween. Keyboard and mouse (mice) are all wired and on USB.

Lately I moved from Aten CS62US-A7 (2*USB + D-SUB) to Aten CS 692 (2*USB + HDMI) following an upgrade to gaming beast. After that, my gaming mouse became unusable. With ISY IPG 3000, cursor on both machines stutters visibly, especially when running any game where mouse movement changes camera position.

Attempts at debug:

  • without KVM at all: mouse works normally
  • with KVM and mouse connected directly to computer: works normally
  • changing DPI settings (physical switch on the mouse) has no effect
  • when mouse is swapped to old, cheap Logitech model it works normally both with and without KVM switch
  • when using old KVM switch, everything works normally (but that's not a solution as I no longer have a D-SUB port to spare)
  • 'lsusb' under linux shows me an Aten device and a Logitech one, regardless whether any mouse is connected at all. That's likely normal as the KVM uses one USB plug for both input devices (I am almost sure...)

Looks like the problem appears only when that specific mouse and that specific KVM are connected to each other. Reviews on the net point that this mouse is not the best quality, but since it used to work, I'd prefer to find a way to fix the problem rather than buy a new mouse.

Hypothesis: is there something that 'gaming-style' mice do internally, before sending input via usb, that plain-old 'office style' mice don't? Something I could turn off in a way working both in Ubuntu and under Windows 7?

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Aten's KVM switches are based on "emulated keyboard and emulated mouse" aged technology which impossible to emulate Gaming Mouse/keyboard today which can adjust DPI and with high-speed in mouse and keyboard engine.

The ONLY solution today for sharing gaming class keyboard and mouse is "DDM class" KVM switches. However, the old generation of "DDM class KVM switches" are limited to the hardware version, they can only work with limited number of gaming keyboard and gaming mouse. The new generation of "DDM class KVM switch" had been just released this week from ConnectPRO. However, currently, only a two port DVI daul-link version is available - (Model number: UD-12AP).

  • Oh, that's interesting. I worked around my problem by switching mouse. New model just... works. DPI is adjustable with a button on mouse body so even if there are missing features I don't really notice that. Still, the question on why one mouse works while other doesn't is a mystery to me. What's the 'high speed in mouse engine' part about? – zencodism Jul 19 '17 at 9:44
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I did run into the same problem. The solution: Use HSM+N to turn off the Keyboard emulation and all works.

  • Oh - Should have mentioned: I was talking about ATEN KVM's. – Mr. 4D Dec 17 '17 at 6:18
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    What's HSM+N? I suppose it should be obvious to someone with the KVM but it might potentially be on specific models and such – Journeyman Geek Dec 17 '17 at 7:30

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