[Solved] New MacOS Catalina breaks DisplayLink
 

I have installed the New Catalina MacOS however it appears to break the current release of DisplayLink

This is more of an FYI for others rather than a cry for help I can live without it until DisplayLink provide an update

Update:
When I say broken I mean I can see the mouse pointer but both external monitors are plank only my laptop screen is visible. Both network and mouse and keyboard all work without issue.

Update2:

I think I have fixed my problem under System Preferences / Security & Privacy / Screen Recording put a tick in the DisplayLinkUserAgent.app

This seem to solve my problem

I don't have the DisplayLinkUserAgent in the ScreenRecording tab.

In terminal :
This will popup a message that Terminal wants to screenrecord.

Driver tested : 5.1.1

I tried the suggestion, but it didn't work for me. I also onl . installed the display link driver after I upgraded. We moved offices yesterday and we are using display link docks. Anything that might make it work?

Thnx! This fixed it for me!

For me broken means the monitors don't recognize the MacBook Pro at all; they just go to sleep. I don't have a Screen Recorder option in Settings to enable.

So right now I'm just looking at 2 dead monitors next to my Laptop until a new driver is released that supports Catalina.

I would suggest you look under every option in the Privacy tab under "Security & Privacy" in System Preferences look for DisplayLinkUserAgent.app it appears in two places for me Screen Recording and Accessibility

Also if this was the first time you installed the driver you will need to click allow under the General Tab Its been a while since I read the install notes on the readme but I think that requirement is detailed there

Fixed it.

My issue is I wasn't running v5.1.1. Once I installed the latest version, and enabled Screen Recording, both of my external monitors worked.

Dude that saved me hours of investigation. Worked perfectly (after reboot)

Thanks!!!

In addition to the security settings solution, I had to change my refresh rate.
 

I don't know if this is monitor specific, but with Mojave I had my two external monitors set to 60 Hertz and all was good but with the Catalina install, the refresh on the external monitor was lagging severely. Changing the refresh rate to 59.88 Hertz (NTSC) fixed this for me.

This worked.

Stupid question, but now the display link user agent is now allowed to record our screen? Is this a privacy issue?

Hi raym,

The new permission is required to be able to use an interface of the O/S that allows the driver to get pixels that are supposed to be displayed on screens connected to DisplayLink devices.

Similarly, on Catalina, you probably noticed you are now being asked to grant permissions for various apps trying to access files in various locations on your disk that are potentially sensitive. (DisplayLink driver does not need any of that in order to work)

Both examples are part of the improved security mechanisms Catalina brings - giving more control to users.

Kind regards,
Michal

Thank you Michal. This makes sense

I got both my monitors working when I boot up but as soon as I undock my macbook and then plug it back in neither external monitor will reconnect, even if I log out and back in it doesn't work. Has to be a full reboot. Any ideas? I have the boxes ticked in both Accessibility and Screen Recording.

I know the subject says Solved, but it's not.

Running a 2018 MBP 15", Catalina 10.15, connecting via USB C. Got an ASUS ZenScreen, installed drivers 5.2 from DisplayLink. Install went fine, I approved the kext, and allowed the screen recording DisplayLinkUserAgent. Rebooted. Doesn't work. The display gives the error: "DisplayPort NO SIGNAL". When connected, the mouse cursor using the touchpad "sticks" every second and then catches up. Tried uninstalling, rebooting, re-installing - 3 times. Same exact thing. So it's definitely still broken. Anyone know when a fix will be coming or any other workaround?

(The only workaround I've found is to use a USB-C to USB-A adapter on the MBP t o convert the USB-C to A - that works... it's obviously not DisplayPort over USB-C anymore, but it does work. But using an adapter is a bad solution when it should just be fixed in software to make USB-C work.)

SysInfo reports:
Version: 5.2 (15)
Last Modified: 8/13/19, 7:34 PM
Bundle ID: com.displaylink.driver.DisplayLinkDriver
Notarized: Yes
Loaded: Yes
Get Info String: DisplayLink Driver 5.2.15 - Copyright © 2003 - 2019 DisplayLink (UK) Ltd. All rights reserved.
Obtained from: Identified Developer
Kind: Intel
Architectures: x86_64
64-Bit (Intel): Yes
Location: /Library/Extensions/DisplayLinkDriver.kext
Kext Version: 5.2 (15)
Load Address: 18446743521823678000
Loadable: Yes
Dependencies: Satisfied
Signed by: Developer ID Application: DisplayLink Corp (73YQY62QM3), Developer ID Certification Authority, Apple Root CA

Tried it all but it still does not work
 

I have ticked it in privacy tab, did it in accessibility tab, but still does not work, the screen is still black, any other options have worked for others?

For me this is also NOT solved. I checked the appropriate boxes in the security settings but the third screen stays black. It is shown in System Preferences -> Monitors, but thats all, nothing is visible on the screen.
I have tried installing the older driver again, uninstalling and installing 5.2.1, nothing seems to helps.

MacBook Air (Beginning of 2015, 2.2GHz i7)

Now, again, after the desaster with MacOS 10.13, I am left with a missing screen in my working environment...

Not solved!
 

I've reinstalled the driver + Checked screen recording box + Reboot several times without succes. The displays show up in preferences, but they remain black. First install cursor was visible, now nothing.

Please fix this.

:mad:

MacBook Pro (13-inch, 2017) with Dell U2717D external monitor.

After the upgrade, I simply missed the checkbox in System Preferences / Security & Privacy / Screen Recording. Made the mistake of installing the beta 2 driver, which did not work. Downgrading back to 5.1.1 and making sure the box was checked and bingo, I have my external monitor back.

Thanks man! With 5.1.1 it is working again. I just tried 5.2.0...

MacBook Air (13-inch, Early 2015)

After struggling to find the solution, I installed 5.1.1 and it is now working again with the permissions checked to record screen.

https://www.displaylink.com/downloads/file?id=1334 is where 5.1.1 can be found.

Hi.

First of all. There is new macOS DisplayLink 5.2.1 beta 2 driver. Please make sure to have it installed: https://www.displaylink.com/downloads/file?id=1433

Secondly, Can you please follow that instructions? Does any of them helps you?
https://support.displaylink.com/know...ing-permission
https://support.displaylink.com/know...lay-is-working
https://support.displaylink.com/know...-functionality


If you still have issues please gather diagnostic information and attach them in the post.
Please use our support tool:
https://www.displaylink.com/downloads/file?d=66

I would be grateful for output of terminal command:
sudo kextstat | grep DisplayLink

Still not working
 

I tried uninstalling the driver than reinstalling but now I don't get the message to approve in Systems Preferences > Security & Privacy > General tab. It installs with no problem, I have the Screen Recording Agent appearing and checked but I still cannot get my monitor to work. Any ideas?

DisplayLinkDriver:

Version: 5.2 (48)
Last Modified: 08/10/19 18:25
Bundle ID: com.displaylink.driver.DisplayLinkDriver
Notarized: Yes
Loaded: No
Get Info String: DisplayLink Driver 5.2.48 - Copyright © 2003 - 2019 DisplayLink (UK) Ltd. All rights reserved.
Obtained from: Identified Developer
Kind: Intel
Architectures: x86_64
64-Bit (Intel): Yes
Location: /Library/Extensions/DisplayLinkDriver.kext
Kext Version: 5.2 (48)
Loadable: Yes
Dependencies: Satisfied
Signed by: Developer ID Application: DisplayLink Corp (73YQY62QM3), Developer ID Certification Authority, Apple Root CA

This works for me (Macbook Air Early 2015)
 

I installed the 5.1.1 version that a previous poster provided and it worked for me. The beta release 5.2.1 beta 2 released on the site as of October 8th doesn't work for me. I have a macbook air early 2015 13-inch with the ASUS 169B+ monitor. Thank you so much thethornley! Your tip saved my day :)

5.1.2 beta to 5.1.1 solved it for me
 

After Catalina and DisplayLink 5.1.2 beta software (as suggested), my screens still did not work (MBP screen flashes when plugging in the dock, other screens remain in sleep mode). Permissions to record screen were given and I tried installing/re-installing multiple times.

Downgrading from 5.1.2 beta to 5.1.1 (which works fine with Catalina for now) solved it for me.

I originally thought that 5.1.2 did not work because the kernel was not loaded (Loadable: Yes, Loaded: No), but it's working with 5.1.1 and it still says not loaded (see below). Hope the devs can provide smoother solutions with the next upgrades.

DisplayLinkDriver:

Version: 5.1 (40)
Last Modified: 09.10.19, 09:39
Bundle ID: com.displaylink.driver.DisplayLinkDriver
Notarised: Yes
Loaded: No
Get Info String: DisplayLink Driver 5.1.40 - Copyright © 2003 - 2019 DisplayLink (UK) Ltd. All rights reserved.
Obtained from: Identified Developer
Kind: Intel
Architectures: x86_64
64-Bit (Intel): Yes
Location: /Library/Extensions/DisplayLinkDriver.kext
Kext Version: 5.1 (40)
Loadable: Yes
Dependencies: Satisfied
Signed by: Developer ID Application: DisplayLink Corp (73YQY62QM3), Developer ID Certification Authority, Apple Root CA

Worked for me
 

It seems that the DisplayLink extension it doesn't load (Loaded: No). So i found a solution to start it using the Bundle ID:

For me it works. I'm also using last beta version of DisplayLink driver.

This works for me too, also using the latest driver.

When executing this command I'm getting the following message:

The display link extension is not loaded. I have installed the latest beta 2 version multiple times. However I'm not getting the System Extension Blocked message as suggested in the knowledge base.

Any suggestions?

Hi, silverscreen

We experience macOS kernel cache issues. Most likely old incompatible kernel extension is still loaded.
Can you help us to verify our suspicion?

Please do following experiment:
- Uninstall DisplayLink software
- Reboot
- What is the output of command(empty output means it is OK):
kextstat | grep DisplayLink

Give us an update, and follow that article if "kextstat | grep DisplayLink" returns non empty output.
2. Please follow steps from that article:
https://support.displaylink.com/know...lay-is-working

After uninstalling and a restart, the output is not empty:

It seems indeed to be a cache issue. How to burst the cache?

Great!

You need to follow the article:
https://support.displaylink.com/know...lay-is-working

tl.dr
1. Uninstall DisplayLink driver first
2. go to recovery mode
3. invoke kextcache command as described in that article.

Based on the title I thought this KB article was not relevant, but it fixed the first problem. The extension is now loaded and I have a mirror of my main monitor.

How to switch this from a mirror to a extended screen (as I had before)? Reconnecting the USB doesn't fix the issue. The Airplay icon is not visible and the only option for AirPlay Display is Off.

Do you have latest 5.2.1 DisplayLink driver installed?
https://www.displaylink.com/downloads/file?id=1433

You can easily switch to extend mode in "System Preferences->Displays->Arrangement" where you have to untick "Mirror Displays" option.

At first the new beta driver did not work, but after doing the kextcache, now 5.2.1 beta works :)

Thanks you

I did a couple of uninstall / installs with 5.2.1 beta 2. Mirror displays is unchecked. AirPlay Display says only off in the select list. I see the Air Play icon and that also says off.

I see the two displays extended (directly connected) and the third (DisplayLink) as mirror. No option to extend the DisplayLink monitor.

I have the following setup: 1-2-3. Where 1 is the display link and 2 and 3 are connected to the Mac Mini. Playing around on the arrangement tab:

• When the menubar is on 1, then all displays are extended.
• When the menubar is on 2, then 1 is a mirror of 2.
• When the menubar is on 3, then 1 is a mirror of 3.

I also noticed that I can move my mouse cursor around on the mirrored screen, like it's a actual extended display, but I cannot click on anything! I want the menubar on 2 because this one is directly on front of me.

Any idea?

I also tried 5.1.1, unfortunately it does not work.

Tried to do it this way, but terminal command is not available in recovery mode on my mac which runs catalina.

After the unsuccessful messing with the recovery mode, decided to delete again the software and download again and reinstall, this will be like the 5 time reinstalling last version, and for some reason it works, finally. Nothing I have tried worked, but uninstalling and installing the software did the trick I guess, and that is the latest version available for display link.

I attached an image.

Upgraded to catalina this morning. At first neither of my monitors were working. I followed the steps on the KB articles that have been linked and got it working... well kinda of. My second monitor (which is connected via displayport to my dock) is having some major issues with with distortion, as the picture shows.


Works fine on my windows PC.

Still not working
 

Hi,

I followed the above suggestions, but everything is still not working. I tried uninstalling and re-installing beta driver, trying to install an older driver as suggested in some of the posts, and the kextcache command didn't seem to do anything other than below:

This is the output of the kextcache -I /Volumes/MyDisk command (I renamed my disk to MyDisk for simplicity):

Error returned: <error:0x1076e5060> {count = 1, transaction: 0, voucher = 0x0, contents = "XPCErrorDescription" => <string:0x1076e51c8> { length = 18, contents = "Connection invalid" }
}
KernelCache ID: D5B91AEB124007B9951B6D7FB9F9AEF1

Any further suggestions?