Intermittent Keyboard Lag using Docking Station


2x22" monitors connected to the UD-3900 docking station. One is using onboard HDMI through a DVI to HDMI cable. Other is direct DVI to DVI.

Docking station has wired mouse (Logitech G402) and keyboard (Razer Ornata Chroma) connected through rear accessory ports. Docking station USB3.0 slot is connected to a Plugable USB 2 way switch (USB3-Switch2). A Thinkpad P52, running Win10 & P3200 Quadro card, is connected to one channel and a custom desktop also running, windows 10 and a GTX760, is connected to the other channel.

Trying to use the system so I can bring work laptop home and use desktop monitors with the laptop or the PC and interact with both using the same keyboard and mouse.

Mouse seems to work fine besides a slight lag noticable while gaming on PC.
Keyboard seems to work fine when on channel 1 to the PC but when connected to the laptop key strokes are missed or the key gets “Stuck” and fills the page with the last key stroke until you hit another key to interupt. (But have to be careful using delete because it will get stuck and delete all)

An alternative to this setup with Plugable components is close to $400 in KVM equipment and cables. Hoping to be able to use this system instead.

Hoping you can help!

Troubleshooting already complete:
Installed latest display link drivers from Plugable website
Tried keyboard plugged into front port as well as all back ports.
Power cycled the docking station.
All actions seem to work for a little bit and then get worse.

Hi Benjamin,

Thank you for contacting us! I am sorry things are not working as expected with your current setup and I would be happy to help.

Thank you as well for the excellent detail you provided and the troubleshooting you have already performed that is very much appreciated.

To help remove one element from the equation, if you have not already I would ask that you test the behavior with the UD-3900 dock directly connected to the Lenovo P52 laptop (by removing the Plugable USB 3.0 2-port switch) to see if that changes the result. Apologies if the suggestion appears in any way redundant, however doing so will help rule out the USB switch (or a specific port within the switch) as a potential contributor.

Should the behavior remain even when the laptop is directly connected to the dock, based on your description the laptop keyboard behavior sounds similar to a problem we have encountered in the past with certain systems that was resolved by applying this Dell update package →

The update will work on your Lenovo system (it is not specific to Dell systems), and it makes a small power management settings change.

Once the update has been applied, please reboot your Lenovo laptop and test the keyboard again to see if that changes the behavior.

Please let us know if that helps!

Plugable Technologies

Thanks for the quick reply Bob!

Testing now, will let you know!

Haven’t been able to test much in the past few days but it seems to be stable. Lets call it closed for now.

Thanks for the help!

Glad to hear it Benjamin, and you are most welcome for the help :slight_smile:

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