[Solved] New MacOS Catalina breaks DisplayLink

[swiip]

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

[alexmarioru]

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

sudo kextload -b com.displaylink.driver.DisplayLinkDriver

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

[charliekelly]

Originally Posted by alexmarioru

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.

[silverscreen]

Originally Posted by alexmarioru

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.

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

com.displaylink.driver.DisplayLinkDriver failed to load - (libkern/kext) different version/uuid already loaded; check the system/kernel logs for errors or try kextutil(8).

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?

[lspintzyk]

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

[silverscreen]

Originally Posted by lspintzyk

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:

kextstat | grep DisplayLink
43 0 0xffffff7f8276c000 0x10000 0x10000 com.displaylink.driver.DisplayLinkDriver (4.3 (124)) 21BA08D2-055E-380E-B526-1798079CF68D <42 13 6 5 3>

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

[lspintzyk]

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.

[silverscreen]

Originally Posted by lspintzyk

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.

[ver0n]

Originally Posted by lspintzyk

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.

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

Thanks you

[Bartonyn]

Originally Posted by lspintzyk

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.

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