Your Dynabook USB-C Dock (model part number PA5356*) may intermittently disconnect and reconnect. Furthermore, you may potentially lose or terminate your LAN connection or face issues with the external monitor output.

When this happens:

• You repeatedly hear the device disconnect and reconnect sound
• USB-C dock LAN connection can be lost or terminated, which result in LAN disconnectivity and other issues

In order to resolve the described issue, please apply the below USB-C dock firmware package v1.0.5.0 and the Realtek LAN driver for USB.
The firmware update tool and the Realtek LAN driver for USB can be found below.

Furthermore,  Dynabook strongly recommend applying the Realtek LAN driver for USB update package (can be found below) as well as the Computers BIOS and graphics card driver to the latest available versions.
Click here to open our Extranet to obtain the latest available version of BIOS and graphics card driver.
https://extranet.support.emea.dynabook.com/login

WARNING INSTRUCTION:

Please read these instructions carefully before applying the USB-C dock firmware update packages.

• Plug the AC adaptor to the dock and connect dock to Computer with USB-C cable. Make sure the dock is detected by the Computer.
• Please make sure the dock remains plugged into the Computer during firmware flashing, disconnecting the dock during flashing may cause dock hardware failure.
• Ensure the PC is in normal working mode during firmware updating. Do not power off or enter sleep mode.
• Please remove any USB devices before executing the firmware update.
  
  

DYNABOOK USB-C DOCK PA5356

Firmware  1.0.5.0 

Change Note:
1.) Resolving potential USB-C dock LAN connection issues and others

USB-C Dock (PA5356) Firmware Update Tool Version: 1.0.5.0

File Download: 

REALTEK LAN DRIVER FOR USB

Windows10

Driver Version: v10.54.0608.2022   |   Supported OS:  Windows 10 x64

File Download:

Windows11

Driver Version: v1153.8.0608.2022   |   Supported OS: Windows 11 x64

File Download: