Display Link Suddenly Stopped Working

ujwalm · 03-09-2026, 10:18 AM

Hello,

I have two USB devices - one is USB to HDMI CADYCE and the Other is USB C to HDMI CADYCE. Earlier both of these devices used to work well and I could use a second monitor on my Mac. However, since last week I am unable to do so.

I have already tried removing the software and reinstalling using the removal tool provided. However, no joy yet.

Please suggest.

ujwalm · 03-09-2026, 10:24 AM

For some reason I am unable to attach the logs. So the link to the logs is here.

Paul E · 03-09-2026, 12:33 PM

Since the overnight update of my MacBook to V. 26.3.1, Display Link stopped working.

Szymon · 03-09-2026, 02:38 PM

Hi ujwalm,

From the logs, I can see that one DisplayLink device was connected earlier, but it stopped appearing on Friday afternoon (2026‑03‑06). It’s also not detected by macOS anymore, as it doesn’t show up in the USB device list.

When you collected the logs, was the device connected via USB cable and powered on?

Regards,
Szymon

Szymon · 03-09-2026, 02:42 PM

Hi Paul,

Quote:

Originally Posted by Paul E

Since the overnight update of my MacBook to V. 26.3.1, Display Link stopped working.

Original problem discussed in this thread is not related to macOS version. The device worked after the upgrade to 26.3.

Could you elaborate more about your setup, (MacBoo, DisplayLink product and monitors)? Are you on DisplayLink Manager 15.1?

Regards,
Szymon

ujwalm · Yesterday, 04:28 AM

Quote:

Originally Posted by Szymon

When you collected the logs, was the device connected via USB cable and powered on?

Yes, this is CADYCE USB to HDMI. I also got a new USB C to HDMI.

Some observations:
1. System Report shows USB device connected as "Generic Billboard Device".
2. Privacy has Screen Recording Allowed.
3. Privacy has "Always Allow" set for accessories.

Szymon · Yesterday, 07:59 AM

I see Generic Billboard Device in the USB devices, but this is not a DisplayLink device. You can tell this by USB Vendor Id. All DisplayLink devices have id 0x17E9.

Regards,
Szymon

ujwalm · Yesterday, 09:36 AM

Thanks for your reply. Whenever I connect CADYCE the Generic Billboard Device is shown. When I remove it it is not shown in the USB. Please see this video..

Also, both of these used to work earlier using DisplayLink.

Quote:

Originally Posted by Szymon

I see Generic Billboard Device in the USB devices, but this is not a DisplayLink device. You can tell this by USB Vendor Id. All DisplayLink devices have id 0x17E9.

Regards,
Szymon

Szymon · Yesterday, 10:01 AM

This confirms CADYCE adapter is not a DisplayLink device. I believe it is a USB Alt-mode adapter. For further help wit this particular device I recommend contacting support of the product manufacturer.

Do you have any other device?

Regards,
Szymon

03-09-2026, 10:18 AM	#1
ujwalm Junior Member Join Date: Mar 2026 Posts: 4	Display Link Suddenly Stopped Working Hello, I have two USB devices - one is USB to HDMI CADYCE and the Other is USB C to HDMI CADYCE. Earlier both of these devices used to work well and I could use a second monitor on my Mac. However, since last week I am unable to do so. I have already tried removing the software and reinstalling using the removal tool provided. However, no joy yet. Please suggest.

03-09-2026, 10:24 AM	#2
ujwalm Junior Member Join Date: Mar 2026 Posts: 4	Support Tool Logs For some reason I am unable to attach the logs. So the link to the logs is here.

03-09-2026, 12:33 PM	#3
Paul E Junior Member Join Date: Mar 2026 Posts: 1	Mine stopped too Since the overnight update of my MacBook to V. 26.3.1, Display Link stopped working. Last edited by Paul E; 03-09-2026 at 12:41 PM.

Yesterday, 10:01 AM	#9
Szymon DisplayLink Tech Support Join Date: Feb 2010 Posts: 260	This confirms CADYCE adapter is not a DisplayLink device. I believe it is a USB Alt-mode adapter. For further help wit this particular device I recommend contacting support of the product manufacturer. Do you have any other device? Regards, Szymon Last edited by Szymon; Yesterday at 10:03 AM.

03-09-2026, 02:38 PM	#4
Szymon DisplayLink Tech Support Join Date: Feb 2010 Posts: 260	Hi ujwalm, From the logs, I can see that one DisplayLink device was connected earlier, but it stopped appearing on Friday afternoon (2026‑03‑06). It’s also not detected by macOS anymore, as it doesn’t show up in the USB device list. When you collected the logs, was the device connected via USB cable and powered on? Regards, Szymon

Yesterday, 07:59 AM	#7
Szymon DisplayLink Tech Support Join Date: Feb 2010 Posts: 260	I see Generic Billboard Device in the USB devices, but this is not a DisplayLink device. You can tell this by USB Vendor Id. All DisplayLink devices have id 0x17E9. Regards, Szymon