Locate the affected pair precisely

If only two USB ports on a TBT3-UDV stop working, their location matters. Plugable identifies the two lower rear ports nearest Ethernet as using an ASMedia ASM1042A controller. The two upper rear ports and the front USB port use a separate Fresco Logic controller. This arrangement explains how one part of the dock can work while another pair is not detected correctly. Check each position and record the result before assuming that the whole dock has failed. The source applies specifically to this discontinued model on certain Windows 10 and Windows 11 systems, rather than every dock with neighboring USB sockets.

Use the driver intended for that controller

Plugable recommends its provided ASMedia USB host controller driver for the described Windows issue. Keep the dock connected during installation, download the package from the current support article and extract it if needed before running the installer. Follow the prompts and restart the computer afterwards. The requirement to remain connected is specific to this procedure; it should not be replaced with the disconnect sequence used in a different DisplayLink cleanup guide. Matching the instructions to the actual fault and controller avoids mixing several valid but unrelated troubleshooting methods into one uncertain process.

Verify the same ports after restarting

Return to the lower rear pair after Windows restarts and test the behavior that originally failed. If the ports remain unavailable, provide support with the computer model, Windows version and a description of which sockets work. Plugable also requests diagnostic output from its supported utility where appropriate. The article notes that this particular Windows driver issue does not apply to macOS and does not require a separate ASMedia driver there. Keep that platform boundary clear. A targeted controller fix can address the documented symptom without establishing that every partial USB failure has the same cause.

Describe the failing sockets by their actual positions

The TBT3-UDV contains separate USB controllers serving different physical groups. Identify whether the lower rear pair nearest Ethernet is affected while the upper rear and front ports work. This location-specific observation matters more than a general report that USB on the dock is unreliable, because the source’s driver explanation concerns that particular controller group.

Confirm the discontinued dock model and the Windows version before applying the procedure. The guide addresses certain Windows 10 and Windows 11 systems and explicitly separates macOS behavior. A partial failure on another dock or operating system is not automatically evidence of the same controller issue, even if two adjacent sockets happen to be involved. Preserve those applicability conditions when explaining the recommendation.

Follow the controller-specific installation sequence

Keep the dock connected as this guide directs while installing the Plugable-provided ASMedia package. That requirement differs from a clean DisplayLink reinstall that begins by disconnecting hardware. Both can be valid within their own procedures; combining pieces from them creates an uncertain sequence that no longer matches the documented controller fix.

Obtain the intended driver through the current product-support route, extract the package where necessary and follow its installer prompts. Restart afterward before judging the result. The installation targets the ASMedia USB host controller, not the graphics software or the separate Fresco Logic group. Keep that scope explicit so that a failure of one pair does not trigger unnecessary replacement of unrelated software serving working parts of the dock.

Retest the same pair and report the comparison

Use the original failed task on the two lower rear ports after restart, and compare with the sockets that already worked. Record whether the targeted group is now detected. If it remains unavailable, provide the computer model, Windows release, working and failing positions and requested diagnostic output to support. The source says this particular driver issue does not require a separate macOS ASMedia installation. A precise follow-up preserves that platform boundary and gives further investigation concrete evidence rather than treating every partial USB failure as a reason to repeat one controller fix.