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PG34WCDM usb-c audio and video connection drops

dbobylev
Level 7

Hey!

I'm connecting: keyboard + mouse + audio interface to monitor via usb, then usb-b + displayport goes to PC, usb-c goes to mac mini

PC works great, since its using usb and video separately. Mac setup have some issues:

Using usb-c cable that came with the monitor I'm observing sound and video drops (sound/ stops for a second or two at random intervals, or screen goes black for a second or two)

I've had some luck with different usb-c cables - like Rode SC27 (rated for 5GBPS) - no issues with sound, however it still drops video sometimes, other random usb-c cables - it's going to be either sound or video drop at random intervals

I've bought apple thunderbolt 5 cable and will check if it will help the issue.

If I connect monitor to mac with hdmi + usb-c it works almost fine, however there's no way to disable video through usb-c, which means mac detects both connections, and auto selecting input source on monitor prefers usb-c connection, so if its coming out of sleep it will always go to USB-C connection.

It would be a great help if there was a menu option to disable video through usb-c and just use it as a kvm downstream, like usb-b for pc.

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1 REPLY 1

Aureliannn_ROG
Customer Service Agent

Hi @dbobylev ,

Thank you for reaching out to us. 

To effectively troubleshoot the intermittent connection issue between your macOS system and ASUS PG34WCDM monitor, we'd like to gather some more information:

Please verify the following:

  1. System updates: Ensure that your macOS system, monitor firmware, and graphics drivers are up-to-date.
  2. USB-C connection:
    Does the issue occur exclusively when connecting the Mac Mini and ASUS PG34WCDM via USB-C?
    If you connect the USB-C cable to other devices, does the problem persist?
  3. Smart KVM function: Check your monitor's settings to see if the Smart KVM function is enabled. Try toggling this setting to see if it resolves the issue.
  4. Display arrangement: In "System Preferences" > "Displays", adjust the display arrangement and ensure the primary display is set correctly.
  5. We'd like to understand your current setup. Are you currently connecting your Mac Mini and PG34WCDM monitor using both HDMI and USB-C cables simultaneously? If so, could you please share the reason for this setup? This information will help me better understand your needs.

To expedite the troubleshooting process, please provide the following information:

  • Mac Mini model:
  • macOS version:
  • ASUS PG34WCDM monitor firmware version:
  • Any on-screen messages when the connection drops: (If applicable, please provide a photo or video)
  • Your product serial number: (Please send us a private message)

[LCD Monitor] KVM switch support setting introduction | Official Support | ASUS Global

Thank you.

Please note that response times may be delayed due to upcoming regional holidays. For urgent inquiries, please contact your local service center. Thank you for your patience.