[Solved] New MacOS Catalina breaks DisplayLink

steelvoltage · 10-10-2019, 11:29 AM

I was able to fix the issue this morning.

Steps that I took:

Uninstalled the displaylink driver.
Shutdown my mac and entered recovery mode.
Opened up the terminal and ran:

Code:

kextcache -i /Volumes/Local

Note: Local is the name of my disk. Yours may vary.
The command returned a string/id/guid (not sure what it entails), but there was no error message.

Code:

reboot

After it booted back up, I opened up terminal again.

Code:

kextcache | grep DisplayLink

The grep returned nothing, which now I knew the driver was gone completely. Grep is a regular expression search, meaning it returning nothing is what we want here as we cleared the cache.

I installed the beta driver and it rebooted.

Afterward, success!

ElKekoTopo · 10-10-2019, 04:02 PM

I tried above solution, after it booted back up, I opened up terminal again. I type kextcache | grep DisplayLink and that's what I get, idk if this is good or not (or should I type that code in recovery mode?). I attached my output logs.

EDIT: Added screenshot of kextstat | grep DisplayLink. It returned nothing so the driver was gone?

EDIT2: Added screenshot of kextstat | grep DisplayLink in recovery mode because I don't knot where I should type this. It retuned command not found.

NancyV · 10-10-2019, 04:50 PM

thanks for your post steelvoltage, it gave me some progress towards a solution

Quote:

Originally Posted by steelvoltage

I was able to fix the issue this morning.

Steps that I took:

Uninstalled the displaylink driver.
Shutdown my mac and entered recovery mode.
Opened up the terminal and ran:

Code:

kextcache -i /Volumes/Local

Note: Local is the name of my disk. Yours may vary.
The command returned a string/id/guid (not sure what it entails), but there was no error message.

Code:

reboot

After it booted back up, I opened up terminal again.

Code:

kextcache | grep DisplayLink

The grep returned nothing, which now I knew the driver was gone completely. Grep is a regular expression search, meaning it returning nothing is what we want here as we cleared the cache.

I installed the beta driver and it rebooted.

Afterward, success!

this solution got output to my 2 DisplayLink driven external monitors, but required some extra work in the system preferences.
reboot broke it all again

Steps:
1. uninstalled DisplayLink driver
2. rebooted and checked the kextcache to verify it was cleared and verified DisplayLink software no longer installed
3. reinstalled DisplayLink driver v5.2(15)
4. rebooted

Results: 2 external DisplayLink monitors are recognized by the OS (cursor displays on each) but only shows black screen. app windows moved to the monitors do not display, nor does the desktop background image

5. Opened System/Preferences/Displays
Selected: Arrangement Mirror Displays
all external monitors display everything perfectly
deselecting 'mirror...' and the DL monitors go back to black, but clicking on each monitor in the arrangement display shows the thin red line indicating another monitor adjacent to the main display
Selected each of the external monitors in turn and selected "Optimize for display"
Unselected 'Mirror Displays" and all are working as expected

6. Rebooting computer - external DisplayLink monitors return to black w/ cursor state.

any other thoughts or suggestions welcome ... I'll try anything at this point. this is my work computer.

Thanks, All!

MGI · 10-11-2019, 07:50 AM

Quote:

Originally Posted by NancyV

thanks for your post steelvoltage, it gave me some progress towards a solution

this solution got output to my 2 DisplayLink driven external monitors, but required some extra work in the system preferences.
reboot broke it all again

Steps:
1. uninstalled DisplayLink driver
2. rebooted and checked the kextcache to verify it was cleared and verified DisplayLink software no longer installed
3. reinstalled DisplayLink driver v5.2(15)
4. rebooted

Results: 2 external DisplayLink monitors are recognized by the OS (cursor displays on each) but only shows black screen. app windows moved to the monitors do not display, nor does the desktop background image

5. Opened System/Preferences/Displays
Selected: Arrangement Mirror Displays
all external monitors display everything perfectly
deselecting 'mirror...' and the DL monitors go back to black, but clicking on each monitor in the arrangement display shows the thin red line indicating another monitor adjacent to the main display
Selected each of the external monitors in turn and selected "Optimize for display"
Unselected 'Mirror Displays" and all are working as expected

6. Rebooting computer - external DisplayLink monitors return to black w/ cursor state.

any other thoughts or suggestions welcome ... I'll try anything at this point. this is my work computer.

Thanks, All!

Same here !
We still wait for a working solution Displaylink !

Please delete [Solved] from the post suject !

NancyV · 10-11-2019, 02:56 PM

MGI quoted [Please delete [Solved] from the post suject]

would if I could, not forum savvy :-(

ElKekoTopo · 10-11-2019, 03:38 PM

Ok I tried everything you Guys post here and still my Mac OS don't give my external display permission to screen recording.

fabietto.re · 10-13-2019, 12:45 PM

Problems here as well. I just updated to Catalina my Mac Mini (late 2012), installed the new beta drivers and provided the required screen recording authorisation. The DisplayLink screen is correctly recognised by the OS and seems to be active (windows can be moved to there), although it is completely blank (not even the mouse pointer can be seen).

Noodles · 10-14-2019, 01:09 PM

I think the root cause of this problem is the same as posted here. Gives more details of what the issue is and how to work around it:

https://blog.obdev.at/how-kernel-pre...acos-catalina/

CherieHere · 10-24-2019, 06:59 AM

I am having same problem where DisplayLink is not in the screen recording window.

Yes I have done everything else suggested in the forum - uninstall, clear cache, reinstall i it is loaded etc. Just not in the screen record list....

Any ideas?

agtcovert · 10-24-2019, 06:53 PM

When I attempt to download the fix script I get (as of 10/23/2019 2:50PM EDT):

This XML file does not appear to have any style information associated with it. The document tree is shown below.
<Error>
<Code>NoSuchKey</Code>
<Message>The specified key does not exist.</Message>
<Key>
live/downloads/software/f1437_KEXT Cache Update Re-installer Script 0.1.zip
</Key>
<RequestId>1E29FB38B4E5F76D</RequestId>
<HostId>
lAMvkkfwN3wusqfPYgiLeqmy/hdxNwHzv53tOWuoPetZggZC/rjwDpBzBYLazxIzQwf8rZrqU1M=
</HostId>
</Error>

I have uninstalled, ran recovery mode with kextcache command, reinstalled using the latest beta3 driver, and the dock/DisplayLink does not work at all. Screens don't even power on. Not seeing how this is resolved.

10-10-2019, 11:29 AM	#1
steelvoltage Junior Member Join Date: Oct 2019 Posts: 2	I was able to fix the issue this morning. Steps that I took: Uninstalled the displaylink driver. Shutdown my mac and entered recovery mode. Opened up the terminal and ran: Code: kextcache -i /Volumes/Local Note: Local is the name of my disk. Yours may vary. The command returned a string/id/guid (not sure what it entails), but there was no error message. Code: reboot After it booted back up, I opened up terminal again. Code: kextcache \| grep DisplayLink The grep returned nothing, which now I knew the driver was gone completely. Grep is a regular expression search, meaning it returning nothing is what we want here as we cleared the cache. I installed the beta driver and it rebooted. Afterward, success! Last edited by steelvoltage; 10-10-2019 at 11:34 AM.

10-24-2019, 06:59 AM	#9
CherieHere Junior Member Join Date: Oct 2019 Posts: 1	DisplayLink not in Screen Recording I am having same problem where DisplayLink is not in the screen recording window. Yes I have done everything else suggested in the forum - uninstall, clear cache, reinstall i it is loaded etc. Just not in the screen record list.... Any ideas?

10-24-2019, 06:53 PM	#10
agtcovert Junior Member Join Date: Oct 2019 Posts: 1	Link for fix script doesn't work...displays don't work When I attempt to download the fix script I get (as of 10/23/2019 2:50PM EDT): This XML file does not appear to have any style information associated with it. The document tree is shown below. <Error> <Code>NoSuchKey</Code> <Message>The specified key does not exist.</Message> <Key> live/downloads/software/f1437_KEXT Cache Update Re-installer Script 0.1.zip </Key> <RequestId>1E29FB38B4E5F76D</RequestId> <HostId> lAMvkkfwN3wusqfPYgiLeqmy/hdxNwHzv53tOWuoPetZggZC/rjwDpBzBYLazxIzQwf8rZrqU1M= </HostId> </Error> I have uninstalled, ran recovery mode with kextcache command, reinstalled using the latest beta3 driver, and the dock/DisplayLink does not work at all. Screens don't even power on. Not seeing how this is resolved.

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10-11-2019, 02:56 PM	#5
NancyV Junior Member Join Date: Sep 2019 Posts: 6	MGI quoted [Please delete [Solved] from the post suject] would if I could, not forum savvy :-(

10-11-2019, 03:38 PM	#6
ElKekoTopo Junior Member Join Date: Oct 2019 Posts: 4	Ok I tried everything you Guys post here and still my Mac OS don't give my external display permission to screen recording.

10-13-2019, 12:45 PM	#7
fabietto.re Junior Member Join Date: Oct 2019 Posts: 1	Problems here as well. I just updated to Catalina my Mac Mini (late 2012), installed the new beta drivers and provided the required screen recording authorisation. The DisplayLink screen is correctly recognised by the OS and seems to be active (windows can be moved to there), although it is completely blank (not even the mouse pointer can be seen).

10-14-2019, 01:09 PM	#8
Noodles Junior Member Join Date: May 2015 Posts: 2	I think the root cause of this problem is the same as posted here. Gives more details of what the issue is and how to work around it: https://blog.obdev.at/how-kernel-pre...acos-catalina/