• You repeatedly hear the device disconnect and reconnect chime
• Your attached monitor will repeatedly flash off and on again
• Or your DisplayLink display freezes or locks up, while directly connected screens, eg the built in laptop screen, continue to work.

1. Check if you have the latest DisplayLink software installed
2. Check if you have the latest USB 3.0 host controller driver installed on your PC
3. Check if you have the latest BIOS version installed on your PC
4. Check if the same behaviour is seen when connected to a USB 2.0 port on your PC (or if none is available with a USB 2.0 cable)
5. Check if the same behaviour is observed with a different USB cable or USB port
6. Try a USB 'Y' cable (if you are using a USB powered monitor product)
7. Try connecting your product through an external mains powered USB hub
8. Disable USB selective suspend
9. Check for error codes in Device Manager
10. Update the dock manufacturer firmware
11. Check PCIe Active State Power Management (ASPM) settings

1. Check if you have the latest DisplayLink software installed

2. Check if you have the latest USB 3.0 host controller driver installed on your PC

3. Check if you have the latest BIOS version installed on your PC

4. Check if the same behaviour is seen when connected to a USB 2.0 port on your PC (or if none is available with a USB 2.0 cable)

5. Check if the same behaviour is observed with a different USB cable or USB port

6. Try a USB 'Y' cable (if you are using a USB powered monitor product)

7. Try connecting your product through an external mains powered USB hub

8. Disable USB selective suspend

1. Open the Control Panel on your PC
2. Select Hardware and Sound
3. Select Power Options
4. Select Change plan settings against your preferred power plan
5. Select Change advanced power settings
6. In the Power Options dialog that opens select USB settings
7. Select the USB selective suspend setting
8. Change the Setting to Disabled

9. Check for error codes in Device Manager

• Unplug your DisplayLink device and restart you laptop
• If the error still shows when you plug the device back, try updating the driver. You can find our latest Windows driver from DisplayLink download section
• We also recommend running a DisplayLink Installation Cleaner first
• Update the computer's BIOS/UEFI with the appropriate file from your system/motherboard manufacturer.

Up until 2009, a few devices based on DisplayLink technology included an auto install driver feature. This required the DisplayLink USB driver to switch the device from being a mass storage device to a video device. On Windows 10, we use the Microsoft USB driver, and this does not support the switching between a mass storage device and a video device.
Therefore it is not possible to support these DisplayLink enabled devices on Windows 10.

Examples for affected devices are:

• LG L206WU USB monitor
• Samsung 940UX USB monitor
• First generation HP USB 2.0 Dock Station (Model number: HSTNN-S01X)
• InFocus IN1100 Projector

10. Update the dock manufacturer firmware

There may have been firmware updates to some of the components not provided by DisplayLink in some docking stations. The firmware updates cover the USB hub on the dock and comes from the manufacturer.

Examples of firmware updates:

• Dell Universal Dock D6000
• HP USB-C/A Universal Dock G2

11. Check PCIe Active State Power Management (ASPM) settings

There have been some compatibility problems reported between various USB devices and some modern, Thunderbolt equipped platforms due to the ASPM settings. We recommend trying disabling ASPM.

TO DISABLE PCIe ASPM

1. Open Control Panel,
2. Search for Power Options,
3. Choose "Change plan settings" and then "Change advanced power settings",
4. In Power Options window scroll down and expand PCI Express,
5. Expand Link State Power Management,
6. Under Settings On battery and Plugged in,
7. Open the drop down menu,
8. Select Off,
9. Click on OK.

IF THE SETTING DOESN'T SHOW

Alternatively you can run this script that will turn the ASPM off.

OR

Run this command that will change the settings via Registry change.

TO REENABLE PCIe ASPM

1. Under Settings On battery and Plugged in,
2. Open the drop down menu,
3. Select either Moderate power savings or Maximum power savings (difference explained below),
4. Click on OK.

There are two levels of power management in the PCIe options. The difference between them are the power savings versus the latency (time to recover from the sleep state).

• If you select Off, there are no power savings, and the current will run regardless of what state the laptop is in. (depending on if your laptop is plugged in or not).

On battery: Off = PCI Express will communicate even when using battery power.

Plugged in: Off = PCI Express will communicate when plugged in as well.

• If you select Moderate Power Savings, the power savings are less, but the time to recover from the Sleep state (latency) is much shorter.
• If you select Maximum Power Savings, the power savings are greater, but the time to recover from the Sleep state (latency) is much longer.

FOR IT MANAGERS

You can disable PCIe ASPM for all of your users using the steps above or by running the command below:

Press Win+R, and type in

powercfg /setacvalueindex SCHEME_CURRENT 501a4d13-42af-4429-9fd1-a8218c268e20 ee12f906-d277-404b-b6da-e5fa1a576df5 0

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