| Feature | Driver required? | |--------|------------------| | USB ports (flash drive, mouse, keyboard) | ❌ No (uses native OS drivers) | | HDMI / VGA output | ❌ No (uses Alt Mode or DisplayPort over USB-C) | | USB-C Power Delivery (charging) | ❌ No | | 3.5mm audio jack | ❌ No | | | ✅ Yes (Realtek or ASIX chip) | | Multiple extended displays (beyond 1 extra monitor) | ✅ Yes (needs DisplayLink driver) |
You will likely be prompted to grant . This is required for DisplayLink to mirror or extend your desktop to the monitors connected to the dock.
Open Device Manager. Under Network adapters , if you see “Realtek USB GbE Family Controller” with a yellow mark, install the driver from Realtek’s official site or use Windows Update > Optional updates. d3908-giq docking station driver
Use the DisplayLink update utility to fix bugs. Driver Conflicts
Regularly updating the driver is essential to ensure compatibility with the latest operating system updates and to fix any bugs or issues. To update the driver: | Feature | Driver required
Locate the file in your downloads folder and double-click it to run the installer.
: Dual or triple monitor support via HDMI and DisplayPort. Data Ports : Multiple USB 3.0 and USB-C ports. Open Device Manager
Open Device Manager → Network adapters → Look for Realtek USB GbE or ASIX AX88179 . No yellow exclamation mark.
2x HDMI (up to 2048x1152) and 1x VGA (1080p). Note that HDMI1 and VGA typically mirror the same display. Data Ports:
The D3908 does not provide power to your laptop via USB-C QGeeM manual . Ensure your laptop is plugged into its own charger, and that the dock itself is connected to its own power supply.
Even after installing the driver, you may encounter problems. Here’s how to solve them.